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Newtec DVB-S2 Calculator: Technical Training

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Newtec DVB-S2 Calculator: Technical Training

This is a technical training presentation on the renewed satcom Newtec DVB-S2 Calculator v2.17 and covers:

- DVB-S
- DVB-S2
- S2 Extensions

For all current Azimuth, Elevation and MDM series (both demods and modems) and includes Sat3Play terminals.

Officially launched beginning of June 2013, this DVB-S2 calculator replaces its widely spread predecessor (which had over 7,000 downloads).

To download the calculator: http://www.newtec.eu/services-training/dvb-s2-calculator

This is a technical training presentation on the renewed satcom Newtec DVB-S2 Calculator v2.17 and covers:

- DVB-S
- DVB-S2
- S2 Extensions

For all current Azimuth, Elevation and MDM series (both demods and modems) and includes Sat3Play terminals.

Officially launched beginning of June 2013, this DVB-S2 calculator replaces its widely spread predecessor (which had over 7,000 downloads).

To download the calculator: http://www.newtec.eu/services-training/dvb-s2-calculator

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Newtec DVB-S2 Calculator: Technical Training

  1. 1. Shaping the Future of Satellite CommunicationsNewtec Proprietary – External UseSales Support: DVB-S2 Calculator Training June 2013 for v2.17 Technical Training DVB-S2 CALCULATOR
  2. 2. Newtec Proprietary – External Use • What is it • Where to find it • How to use it • Input data • Output data • Performance specific data • How to determine the available resources in a transponder • Overhead • Rate information • Table overview • Some exercises Technical Training DVB-S2 CALCULATOR Sales Support: DVB-S2 Calculator Training
  3. 3. Newtec Proprietary – External Use • This BETA version is an addition to the well-know Newtec DVB-S2 calculator (which has over 7,000 downloads since launch) and covers: • DVB-S • DVB-S2 • S2 Extensions • For all current Azimuth, Elevation and MDM series of demods and modems • Includes Sat3Play terminals WHAT IS IT? Sales Support: DVB-S2 Calculator Training
  4. 4. Newtec Proprietary – External Use Will put you on the list to receive free updates REGISTER TO DOWNLOAD Sales Support: DVB-S2 Calculator Training
  5. 5. Newtec Proprietary – External Use INPUT DATA Sales Support: DVB-S2 Calculator Training
  6. 6. Newtec Proprietary – External Use Select the type of modulation. • DVB-S • DVB-S2 • S2 Extensions SYSTEM Sales Support: DVB-S2 Calculator Training
  7. 7. Newtec Proprietary – External Use • Select the hardware that is used as demodulator or modem. • This will determine the limitations and performance data according to the hardware that is being used. • Notice that only the demod-board performance is needed here, there is no notion of modulation equipment. DEMODULATOR HARDWARE Sales Support: DVB-S2 Calculator Training
  8. 8. Newtec Proprietary – External Use Select the transponder operating mode. This field will be used to determine the advised IBO and OBO plus associated degradation when operating in the non-linear region in saturation. • Multi-carrier • Single carrier • without predistortion • with predistortion • in linearized transponder with predistortion TRANSPONDER Sales Support: DVB-S2 Calculator Training
  9. 9. Newtec Proprietary – External Use Allows to enter the transponder spacing in MHz. Typically this is 80 MHz for 72 MHz transponders and 40 MHz for 36 MHz transponders. Consult the frequency planning of the satellite in case of doubt. TRANSPONDER SPACING Sales Support: DVB-S2 Calculator Training
  10. 10. Newtec Proprietary – External Use Select which data is to be used as input. • Allocated bandwidth • Baudrate • Info rate CARRIER INPUT MODE Sales Support: DVB-S2 Calculator Training
  11. 11. Newtec Proprietary – External Use • Select the modcod from the drop down that will be used on the carrier. Depending on the selected system and hardware the list will be updated to reflect only valid selections. • Remark that all possible MODCODs are present in this drop-down list. • However some MODCODs might be less efficient than higher MODCODs. For a selected list with only the optimal MODCODs, please refer to the table at the bottom of the sheet. MODCOD SELECTION Sales Support: DVB-S2 Calculator Training
  12. 12. Newtec Proprietary – External Use Intermezzo ABOUT LINEAR AND NON- LINEAR MODCODS Sales Support: DVB-S2 Calculator Training 64APSK non-linear 64APSK linear
  13. 13. Newtec Proprietary – External Use • Select the roll-off factor that is used on the carrier. The roll-off factor will determine the occupied bandwidth. • All DVB-S2 and CCT (Clean Channel Technology™) roll-off factors are supported. ROLL-OFF FACTOR (α) Sales Support: DVB-S2 Calculator Training
  14. 14. Newtec Proprietary – External Use • Select between normal and short frames. • Short frames have a slightly lower performance (- 0.1~0.2 dB) but have lower delay. • Typically short frames are only used in systems where the symbolrate is lower than 1 Mbaud and where delay becomes an issue. FRAME TYPE Sales Support: DVB-S2 Calculator Training
  15. 15. Newtec Proprietary – External Use • Select between pilot insertion on or off. • Pilots are additional synchronization symbols that are inserted at regular intervals in order to aid in carrier synchronization. • It is advised to enable pilots in VCM and ACM systems or in CCM systems that employ low FECs (for example DVB-S2 8PSK 3/5). PILOT INSERTION Sales Support: DVB-S2 Calculator Training
  16. 16. Newtec Proprietary – External Use • Depending on the system and hardware selected, a number of encapsulation methods become available. • For transport streams, select “none”. • This will be used to calculate the encapsulation overhead depending on the traffic type selected. IP ENCAPSULATOR Sales Support: DVB-S2 Calculator Training
  17. 17. Newtec Proprietary – External Use • GSE encapsulation supports addressing terminals by use of a label. • This label can be 3 bytes long or 6 bytes long. • Each terminal will then need to use its label to filter out the traffic for that terminal. • In small IP trunking networks, there is no need for these labels as terminals can be identified by means of the different ISI in the outbound carrier. GSE LABEL Sales Support: DVB-S2 Calculator Training
  18. 18. Newtec Proprietary – External Use • Defines which type of traffic is used over the modems. • The type of traffic will determine the average IP packet size which in term will determine the average encapsulation overhead. • iMix • TSoIP (including RTP) • TSoIP (excluding RTP) • Not applicable (in case of TS) TRAFFIC Sales Support: DVB-S2 Calculator Training
  19. 19. Newtec Proprietary – External Use For FER 1E-7 and 1E-3 OUTPUT DATA Sales Support: DVB-S2 Calculator Training Es/No (=C/(N+D) [dB] 8.09 C/(No+Do) [dBHz] 82.57 Eb/No [dB] 4.45 Info rate [Mbps] 64.786 Baudrate [Mbaud] 28.000 Bandwidth [MHz] 30.800 Efficiency [bits/baud] 2.314 [bits/Hz] 2.103 Frame length [ms] 0.596 Minimum baudrate [Mbaud] 1.000 Maximum baudrate [Mbaud] 72.000 Es/No (=C/(N+D) [dB] 7.94 C/N [dB] 9.03 Csat.pure.car/(No*Rs) [dB] 10.20 Csat.pure.car/(No*Alloc.bw) [dB] 9.78 Output data FER 1E-7 Output data FER 1E-3
  20. 20. Newtec Proprietary – External Use • Energy per symbol over the noise density. • This is the required Es/No threshold in dB for operation in the linear channel as listed on the datasheets. • This performance is measured in an RF loopback. • C/(N+D) is as indicated by the Newtec demod’s NoDE tool Es/No = C/(N+D) Sales Support: DVB-S2 Calculator Training
  21. 21. Newtec Proprietary – External Use • Total carrier power over the noise density • This is a measure for the required satellite resources • It is the product of the Es/No and the symbolrate and is calculated as C/No = Es/No + 10*log(SR) C/(No+Do) Sales Support: DVB-S2 Calculator Training
  22. 22. Newtec Proprietary – External Use • Energy per bit over the noise density. • This is the required Eb/No in dB. • It is calculated as Eb/No = Es/No – 10*log(n) with n = the spectral efficiency in bits/baud. • In case the Eb/No threshold is needed for single carrier per transponder operation, calculate the Eb/No back from C/N (see performance specific information) as this value includes the non-linear degradation. Eb/No Sales Support: DVB-S2 Calculator Training
  23. 23. Newtec Proprietary – External Use Inforate • The information rate (in Mbps) is the rate at the input of the modulator part of the modem (so after encapsulation by the interface part) Baudrate • The symbolrate of the carrier in Mbaud. In some programs referred to as noise bandwidth Bandwidth • This is the occupied bandwidth of the signal and is the symbolrate multiplied with the applied roll-off. • BW = SR *(1+α) with α = 0.05 to 0.35 INFORATE BAUDRATE BANDWIDTH Sales Support: DVB-S2 Calculator Training
  24. 24. Newtec Proprietary – External Use • Efficiency is displayed in • bits/baud (information rate divided by the symbolrate) • bits/Hz (information rate divided by the occupied bandwidth) taking into account the used roll-off factor.Bits/baud Bits/Hz EFFICIENCY Sales Support: DVB-S2 Calculator Training
  25. 25. Newtec Proprietary – External Use PERFORMANCE SPECIFIC INFORMATION Sales Support: DVB-S2 Calculator Training Csat.pure.car/(No*Rs) [dB] 21.45 Csat.pure.car/(No*Alloc.bw) [dB] 20.84 Csat.pure.car/(No*Txp) [dB] 20.28 C/N [dB] 20.93 IBO [dB] 0.50 OBO [dB] 0.53 C/D [dB] 23.82 Non-linear degradation [dB] 1.80 Performance specific information
  26. 26. Newtec Proprietary – External Use • This is calculated as Es/No + OBO + non-linear degradation. • It is a measure for the needed resources in the transponder in order to close the link. Csat.pure.car/(No*Rs) Sales Support: DVB-S2 Calculator Training
  27. 27. Newtec Proprietary – External Use • Knowing what the available resources in a transponder are will give you an idea on what C/N can be achieved in a given link. • A simple way of determining this is to uplink a pure carrier at full saturation. • When observing the transponder at that stage, one can see the carrier power and the noise present in the transponder. Csat.pure.car/(No*Rs) Intermezzo HOW TO DETERMINE THE AVAILABLE RESOURCES IN A TRANSPONDER Sales Support: DVB-S2 Calculator Training
  28. 28. Newtec Proprietary – External Use Csat.pure.car/(No*Rs) Intermezzo HOW TO DETERMINE THE AVAILABLE RESOURCES IN A TRANSPONDER Sales Support: DVB-S2 Calculator Training • Power of the carrier: Csat.pure.car = - 10 dBm • Noise power density: No = - 107.6 dBm/Hz -10 dBm -107.6 dBm/Hz
  29. 29. Newtec Proprietary – External Use Csat.pure.car/(No*Rs) Intermezzo HOW TO DETERMINE THE AVAILABLE RESOURCES IN A TRANSPONDER Sales Support: DVB-S2 Calculator Training • Density : Csat.pure.car/(Rs) = - 10 – 10 log(30E6) = -84.8 dB/Hz -84.8 dBm/Hz
  30. 30. Newtec Proprietary – External Use • If during the CW measurement the noise floor of the transponder is measured, we can now calculate the achievable C/N. • In this case • Csat.pure.car/(No*Rs) = -84.4 – (-107.6) = 23.2 dB • If the selected MOCOD requires a certain OBO value, this will have to be subtracted in order to obtain the achievable C/N. Csat.pure.car/(No*Rs) Intermezzo HOW TO DETERMINE THE AVAILABLE RESOURCES IN A TRANSPONDER Sales Support: DVB-S2 Calculator Training
  31. 31. Newtec Proprietary – External Use • If in our example the carrier is modulated with 32APSK 5/6, requiring 3.5 dB OBO, the available C/N is 23.2 – 3.5 = 19.7 dB. • Taking into account the 16.75 dB C/N (Es/N + non- linear degradation) that is needed, we can see that this link will have about 2 dB of link margin. • The amount of additional link margin will of course be determined by the availability that is targeted. Csat.pure.car/(No*Rs) Intermezzo HOW TO DETERMINE THE AVAILABLE RESOURCES IN A TRANSPONDER Sales Support: DVB-S2 Calculator Training
  32. 32. Newtec Proprietary – External Use • This is the same value as Csat.pure.car/(No*Rs) but referenced to the total transponder bandwidth. • It is used to compare usage of a full transponder Csat.pure.car/(No*Txp.BW) Sales Support: DVB-S2 Calculator Training
  33. 33. Newtec Proprietary – External Use • The carrier-to-noise needed at threshold. • This is the sum of the Es/No and the non-linear degradation in case of full transponder operation. • It is the value that needs to be entered in the linkbudget program if the non-linear degradation is not indicated separately. C/N Sales Support: DVB-S2 Calculator Training
  34. 34. Newtec Proprietary – External Use • The required input back-off in for optimal performance • This point is the balance between the two contradictory requirements: • The need to go as far into saturation to maximize the output power but with a result increased distortion • The need to stay away from saturation and operate in the linear region in order to keep distortion degradation to a minimum but resulting in lower output power. IBO Sales Support: DVB-S2 Calculator Training
  35. 35. Newtec Proprietary – External Use • The output back-off in dB as a result of the selected IBO. • Remark that this is measured with modulated carrier so including modulation loss. OBO Sales Support: DVB-S2 Calculator Training
  36. 36. Newtec Proprietary – External Use • Carrier-to-distortion ratio as indicated by the NoDE™ tool in Newtec demodulators. • It is the distortion that will be present when operating at the optimal IBO/OBO point. • It can be used to determine this optimal operation point during line-up. C/D Sales Support: DVB-S2 Calculator Training
  37. 37. Newtec Proprietary – External Use OVERHEAD Sales Support: DVB-S2 Calculator Training
  38. 38. Newtec Proprietary – External Use • This is the raw FEC overhead. • For example 3/4 result in a FEC overhead of 0.750 FEC EXCLUDING FRAMING OVERHEAD Sales Support: DVB-S2 Calculator Training
  39. 39. Newtec Proprietary – External Use • This is the additional overhead caused by the DVB- S2 framing (baseband framing, physical layer framing, pilot insertion,…) • It is typically around 3% FRAMING OVERHEAD Sales Support: DVB-S2 Calculator Training
  40. 40. Newtec Proprietary – External Use • The IP encapsulation overhead as function of: • encapsulation method • label format • type of traffic. ENCAPSU- LATION OVERHEAD Sales Support: DVB-S2 Calculator Training
  41. 41. Newtec Proprietary – External Use • This overhead is only applicable when the complete TSoIP is transported over the satellite as IP. • It is used to calculate the effective TS rate from the TSoIP at the input of the modem. • In normal transports stream mode (such as on the MDM6100 broadcast modem) the interface will decapsulate the TS from the TSoIP and only transport stream packets. This doesn’t not result in additional overhead. TSoIP OVERHEAD Sales Support: DVB-S2 Calculator Training
  42. 42. Newtec Proprietary – External Use RATE INFORMATION Sales Support: DVB-S2 Calculator Training
  43. 43. Newtec Proprietary – External Use • In case of TSoIP that is transported as native IP, this is the overhead caused by the encapsulation of the transport stream packets in IP packets. • This encapsulation is not done in the modem but typically by a MUX. • The value can be used to determine the effective rate of the transport stream. TRANSPORT STREAM RATE AND EFFICIENCY Sales Support: DVB-S2 Calculator Training
  44. 44. Newtec Proprietary – External Use • The effective rate at the input of the modem. EFFECTIVE IP RATE AND EFFICIENCY Sales Support: DVB-S2 Calculator Training
  45. 45. Newtec Proprietary – External Use • The rate at the input of the modulator part of the modem, so after the interface block that does the encapsulation. • To be used when encapsulation overhead is noted separately. INFO RATE AND EFFICIENCY Sales Support: DVB-S2 Calculator Training
  46. 46. Newtec Proprietary – External Use • The data rate as if only FEC and modulation would be applied. • Sometime called the satellite rate. • Example: • QPSK ¾, 10 Mbaud  satellite rate = 10 * 2 * ¾ = 15 Mbps RAW DATA RATE AND EFFICIENCY Sales Support: DVB-S2 Calculator Training
  47. 47. Newtec Proprietary – External Use • MODCODs are listed by their required satellite resources and MODCODs that have lower efficiency versus their needed resources compared to the adjoining MODCODs are removed. • The optimal MODCOD for the selected configuration is highlighted. TABLE OVERVIEW Sales Support: DVB-S2 Calculator Training Optimal modcod 32APSK 3/4 ranking Modcod overview Es/No (=C/(N+D) Inforate efficiency C/N OBO Csat.pure.car/(No*Txp) [dB] [bits/Hz] [dB] [dB] [dB] 1 32APSK 9/10 16.26 3.11 18.38 4.74 21.65 2 32APSK 8/9 15.95 3.07 17.90 4.72 21.16 3 32APSK 5/6 14.61 2.88 16.61 4.05 19.20 4 32APSK 4/5 14.06 2.76 16.18 3.66 18.37 5 32APSK 3/4 13.17 2.59 15.31 3.34 17.20 6 16APSK 8/9 13.16 2.46 15.06 2.55 16.15 7 16APSK 5/6 11.86 2.30 13.74 2.04 14.31 8 16APSK 4/5 11.30 2.21 13.15 1.82 13.51 9 16APSK 3/4 10.48 2.07 12.28 1.61 12.43 10 16APSK 2/3 9.23 1.84 10.93 1.24 10.70 11 8PSK 3/4 8.20 1.56 8.95 0.69 8.18 12 8PSK 2/3 6.84 1.38 7.47 0.61 6.62 13 8PSK 3/5 5.88 1.24 6.30 0.62 5.47 Available Modcods in optimal ranking
  48. 48. Newtec Proprietary – External Use • The ranking of MODCODs is based on the required resources Csat.pure.car/(No*Txp). • The MODCODs are presented in a filtered way. • For example in the case pictured above, it makes no sense to even add the MODCOD for 16APSK 9/10 since it would require bigger resources for a lower efficiency. TABLE OVERVIEW Sales Support: DVB-S2 Calculator Training Ranking Optimal modcod QPSK 2/5 ranking Modcod overview Es/No (=C/(N+D) Inforate efficiency C/N OBO Csat.pure.car/(No*Txp) [dB] [bits/Hz] [dB] [dB] [dB] 1 32APSK 9/10 16.26 3.11 18.38 4.74 21.65 2 32APSK 8/9 15.95 3.07 17.90 4.72 21.16 3 32APSK 5/6 14.61 2.88 16.61 4.05 19.20 4 32APSK 4/5 14.06 2.76 16.18 3.66 18.37 5 32APSK 3/4 13.17 2.59 15.31 3.34 17.20 6 16APSK 8/9 13.16 2.46 15.06 2.55 16.15 7 16APSK 5/6 11.86 2.30 13.74 2.04 14.31 8 16APSK 4/5 11.30 2.21 13.15 1.82 13.51 Available Modcods in optimal ranking
  49. 49. Newtec Proprietary – External Use Es/No • The required Es/No for the linear channel. C/N • The carrier-to-noise needed at threshold. This is the sum of the Es/No and the non-linear degradation in case of full transponder operation. • It is the value that needs to be entered in the linkbudget program if the non-linear degradation is not indicated separately. TABLE OVERVIEW Sales Support: DVB-S2 Calculator Training Es/No C/N Optimal modcod QPSK 2/5 ranking Modcod overview Es/No (=C/(N+D) Inforate efficiency C/N OBO Csat.pure.car/(No*Txp) [dB] [bits/Hz] [dB] [dB] [dB] 1 32APSK 9/10 16.26 3.11 18.38 4.74 21.65 2 32APSK 8/9 15.95 3.07 17.90 4.72 21.16 3 32APSK 5/6 14.61 2.88 16.61 4.05 19.20 4 32APSK 4/5 14.06 2.76 16.18 3.66 18.37 5 32APSK 3/4 13.17 2.59 15.31 3.34 17.20 6 16APSK 8/9 13.16 2.46 15.06 2.55 16.15 7 16APSK 5/6 11.86 2.30 13.74 2.04 14.31 8 16APSK 4/5 11.30 2.21 13.15 1.82 13.51 Available Modcods in optimal ranking
  50. 50. Newtec Proprietary – External Use • The resulting output back-off in dB. Remark that this is measured with modulated carrier so including modulation loss. TABLE OVERVIEW Sales Support: DVB-S2 Calculator Training OBO Optimal modcod QPSK 2/5 ranking Modcod overview Es/No (=C/(N+D) Inforate efficiency C/N OBO Csat.pure.car/(No*Txp) [dB] [bits/Hz] [dB] [dB] [dB] 1 32APSK 9/10 16.26 3.11 18.38 4.74 21.65 2 32APSK 8/9 15.95 3.07 17.90 4.72 21.16 3 32APSK 5/6 14.61 2.88 16.61 4.05 19.20 4 32APSK 4/5 14.06 2.76 16.18 3.66 18.37 5 32APSK 3/4 13.17 2.59 15.31 3.34 17.20 6 16APSK 8/9 13.16 2.46 15.06 2.55 16.15 7 16APSK 5/6 11.86 2.30 13.74 2.04 14.31 8 16APSK 4/5 11.30 2.21 13.15 1.82 13.51 Available Modcods in optimal ranking
  51. 51. Newtec Proprietary – External Use • Csat.pure.car/(No*Txp) • This is calculated as Es/No + OBO + non-linear degradation. • It is a measure for the needed resources in the transponder in order to close the link. TABLE OVERVIEW Sales Support: DVB-S2 Calculator Training Csat.pure.car/(No*Txp) Optimal modcod QPSK 2/5 ranking Modcod overview Es/No (=C/(N+D) Inforate efficiency C/N OBO Csat.pure.car/(No*Txp) [dB] [bits/Hz] [dB] [dB] [dB] 1 32APSK 9/10 16.26 3.11 18.38 4.74 21.65 2 32APSK 8/9 15.95 3.07 17.90 4.72 21.16 3 32APSK 5/6 14.61 2.88 16.61 4.05 19.20 4 32APSK 4/5 14.06 2.76 16.18 3.66 18.37 5 32APSK 3/4 13.17 2.59 15.31 3.34 17.20 6 16APSK 8/9 13.16 2.46 15.06 2.55 16.15 7 16APSK 5/6 11.86 2.30 13.74 2.04 14.31 8 16APSK 4/5 11.30 2.21 13.15 1.82 13.51 Available Modcods in optimal ranking
  52. 52. Newtec Proprietary – External Use Linear channel TABLE OVERVIEW Sales Support: DVB-S2 Calculator Training 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 -5.00 0.00 5.00 10.00 15.00 20.00 Efficiency[bits/baud] Es/No [dB] Es/No versus efficiency Multi carrier 64APSK 32APSK 16APSK 8PSK QPSK
  53. 53. Newtec Proprietary – External Use • A 20 Mbps IP stream MPE encapsulated in DVB-S2 (roll-off 20%, 16APSK 5/6 received by an EL470 modem • How much space capacity is currently needed? • Using the exact same resources, what is the increase in throughput using DVB-S2E with GSE? • Is there an optimization possible by reducing the roll-off but still using the same PEB? Exercise 1 SOME EXAMPLES Sales Support: DVB-S2 Calculator Training
  54. 54. Newtec Proprietary – External Use Input parameters SOME EXAMPLES Sales Support: DVB-S2 Calculator Training System DVB-S2 Demodulator Hardware EL470 IP modem Transponder Multi carrier Transponder spacing [MHz] 40 Carrier input mode Inforate Inforate [Mbps] 20 Modcod 16APSK 5/6 Roll-off factor 0.2 Frame type Normal frames Pilots Pilots on IP encapsulator MPE Label No label Traffic iMix Input data
  55. 55. Newtec Proprietary – External Use Es/No (=C/N) [dB] 12.10 C/No [dBHz] 80.03 Eb/No [dB] 7.02 Info rate [Mbps] 20.000 Baudrate [Mbaud] 6.208 Bandwidth [MHz] 7.449 Efficiency [bits/baud] 3.222 [bits/Hz] 2.685 Frame length [ms] 2.688 Minimum baudrate [Mbaud] 0.256 Maximum baudrate [Mbaud] 33.000 Output data FER 1E-7 Used resources Space capacity needed SOME EXAMPLES Sales Support: DVB-S2 Calculator Training
  56. 56. Newtec Proprietary – External Use System S2 Extentions Demodulator Hardware MDM6000-DH02-S2Ext Demod Transponder Multi carrier Transponder spacing [MHz] 40 Carrier input mode Bandwidth Bandwidth [MHz] 7.449 Modcod 16APSK-L 150/180 Roll-off factor 0.05 Frame type Normal frames Pilots Pilots on IP encapsulator GSE Label No label Traffic iMix Input data New configuration SOME EXAMPLES Sales Support: DVB-S2 Calculator Training
  57. 57. Newtec Proprietary – External Use Es/No (=C/N) [dB] 11.38 C/No [dBHz] 79.89 Eb/No [dB] 6.30 Info rate [Mbps] 22.857 Baudrate [Mbaud] 7.094 Bandwidth [MHz] 7.449 Efficiency [bits/baud] 3.222 [bits/Hz] 3.068 Frame length [ms] 2.352 Minimum baudrate [Mbaud] 1.000 Maximum baudrate [Mbaud] 72.000 Output data FER 1E-7 Used resources are equal or lower in same bandwidth SOME EXAMPLES Sales Support: DVB-S2 Calculator Training Throughput increased with 2.8 Mbps
  58. 58. Newtec Proprietary – External Use • A contribution carrier operates in DVB-S at 27.5 Mbaud 8PSK 5/6 with RO 25% in a linearized 36 MHz transponder. • What is possible using DVB-S2E using the same resources? • What is the gain of predistortion? • Find the optimal point for roll-off versus symbolrate? (you’ll need Csat.pure.car/(No*Txp.BW) for this) Exercise 2 SOME EXAMPLES Sales Support: DVB-S2 Calculator Training
  59. 59. Newtec Proprietary – External Use INPUT DATA Sales Support: DVB-S2 Calculator Training System DVB-S Demodulator Hardware AZ910 Broadcast demod Transponder Single carrier without predistortion Transponder spacing [MHz] 40 Carrier input mode Baudrate Baudrate [Mbaud] 27.5 Modcod 8PSK 5/6 Roll-off factor 0.25 Frame type Normal frames Pilots Pilots on IP encapsulator None Label No label Traffic iMix Input data
  60. 60. Newtec Proprietary – External Use OUTPUT DATA Sales Support: DVB-S2 Calculator Training Es/No (=C/(N+D) [dB] 12.21 C/(No+Do) [dBHz] 86.60 Eb/No [dB] 8.59 Info rate [Mbps] 63.360 Baudrate [Mbaud] 27.500 Bandwidth [MHz] 34.375 Efficiency [bits/baud] 2.304 [bits/Hz] 1.843 Minimum baudrate [Mbaud] 1.000 Maximum baudrate [Mbaud] 45.000 Output data FER 1E-7
  61. 61. Newtec Proprietary – External Use RESOURCES Sales Support: DVB-S2 Calculator Training Csat.pure.car/(No*Rs) [dB] 14.22 Csat.pure.car/(No*Alloc.bw) [dB] 13.25 Csat.pure.car/(No*Txp) [dB] 12.59 C/N [dB] 13.87 IBO [dB] 0.50 OBO [dB] 0.35 C/D [dB] 17.19 Non-linear degradation [dB] 1.66 Performance specific information
  62. 62. Newtec Proprietary – External Use RESOURCES Sales Support: DVB-S2 Calculator Training System S2 Extentions Demodulator Hardware MDM6000-DH02-S2Ext Demod Transponder Single carrier without predistortion Transponder spacing [MHz] 40 Carrier input mode Bandwidth Bandwidth [MHz] 36 Modcod 16APSK 135/180 Roll-off factor 0.1 Frame type Normal frames Pilots Pilots on IP encapsulator GSE Label No label Traffic iMix Input data New configuration
  63. 63. Newtec Proprietary – External Use Csat.pure.car/(No*Rs) [dB] 13.80 Csat.pure.car/(No*Alloc.bw) [dB] 13.39 Csat.pure.car/(No*Txp) [dB] 12.93 C/N [dB] 12.19 IBO [dB] 5.50 OBO [dB] 1.61 C/D [dB] 15.07 Non-linear degradation [dB] 1.81 Performance specific information RESOURCES Sales Support: DVB-S2 Calculator Training New configuration Use about the same resources
  64. 64. Newtec Proprietary – External Use 63.36 Mbps  94.79 Mbps RESULT Sales Support: DVB-S2 Calculator Training Es/No (=C/(N+D) [dB] 10.39 C/(No+Do) [dBHz] 85.54 Eb/No [dB] 5.77 Info rate [Mbps] 94.789 Baudrate [Mbaud] 32.727 Bandwidth [MHz] 36.000 Efficiency [bits/baud] 2.896 [bits/Hz] 2.633 Frame length [ms] 0.510 Minimum baudrate [Mbaud] 1.000 Maximum baudrate [Mbaud] 72.000 Output data FER 1E-7
  65. 65. Newtec Proprietary – External Use YET ANOTHER EXAMPLE Sales Support: DVB-S2 Calculator Training System DVB-S2 System S2 Extentions Demodulator Hardware EL470 IP modem Demodulator Hardware MDM6000-DH02-S2Ext Demod Transponder Multi carrier Transponder Multi carrier Transponder spacing [MHz] 40 Transponder spacing [MHz] 40 Carrier input mode Bandwidth Carrier input mode Bandwidth Bandwidth [MHz] 10 Bandwidth [MHz] 10 Modcod 8PSK 5/6 Modcod 16APSK-L 126/180 Roll-off factor 0.2 Roll-off factor 0.05 Frame type Normal frames Frame type Normal frames Pilots Pilots on Pilots Pilots on IP encapsulator XPE IP encapsulator GSE Label No label Label No label Traffic iMix Traffic iMix Csat.pure.car/(No*Txp) [dB] Csat.pure.car/(No*Txp) [dB] Es/No [dB] 9.70 Es/No [dB] 9.14 C/No [dB] 78.91 C/No [dB] 78.93 C/N [dB] C/N [dB] Info rate [Mbps] 20.186 Info rate [Mbps] 25.735 Baudrate [Mbaud] 8.333 Baudrate [Mbaud] 9.524 Bandwidth [MHz] 10.000 Bandwidth [MHz] 10.000 Info rate [%] 27.489 Baudrate [%] 14.286 Bandwidth [%] 0.000 Gain Input data configuration A Input data configuration B Output data FER 1E-7 Output data FER 1E-7 Performance specific information Performance specific information Using the same resources, and increase of 27% is achieved
  66. 66. Get in touch FOLLOW US THANK YOU Dave Suffys Newtec Sales Support Manager dsu@newtec.eu

Notas del editor

  • Multi-carrier: in multiple carrier per transponder mode, the transponder is assumed to work with sufficient global back off in order to guarantee linear operation. No additional degradation due to distortion is taken into account. Single carrier without predistortion: when a single carrier occupies a full transponder, it can be driven further into saturation (into the non-linear region). This will on one side increase the satellite output power (hence the achievable downlink C/N) while on the other side will also increase the degradation due to non-linearity. A balance between optimal IBO/OBO and resulting degradation needs to be found. The parameters in the output field can be used for this.Single carrier with predistortion: in order to overcome some of the degradation effects due to distortion, Newtec can enable Equalink™ predistortion on the modulator side. This allows to drive the transponder even further into saturation, effectively increasing the possible throughput. This mode is selected for non-linearized transponders.Single carrier in linearized transponder with predistortion: in order to overcome some of the degradation effects due to distortion, Newtec can enable Equalink™ predistortion on the modulator side. This allows to drive the transponder even further into saturation, effectively increasing the possible throughput. This mode is selected for linearized transponders which have a different IBO/OBO relationship compared to non-linearized transponders.
  • This value is used to determine the maximum occupied bandwidth a carrier is allowed to have. Traditionally, DVB carriers where allowed an occupied bandwidth equal to the transponder bandwidth (defined by the -1 dB points with typical values 36/54 and 72 MHz). With the advent of automatic linear predistortion (Equalink™) it is possible to extend the carrier bandwidth to the occupy the full allocated frequency slot of the transponder.
  • Allocated bandwidth: allows to enter the allocated bandwidth. From that (using the selected roll-off factor) the usable symbolrate and resulting info rate will be calculated.Baudrate: allows to enter the baudrate (symbolrate) of the carrier. From that (using the selected roll-off factor) the allocated bandwidth and resulting info rate will be calculated.Info rate: allows to enter the information rate. The information rate is the raw input rate at the modulator board so including the encapsulation overhead. From that the needed baudrate (using the selected modulation and coding) is calculated as well as the needed allocated bandwidth.
  • Select the modcod from the drop down that will be used on the carrier. Depending on the selected system and hardware the list will be updated to reflect only valid selections.Remark that all possible MODCODs are present in this drop-down list. However some MODCODs might be less efficient than higher MODCODs. For a selected list with only the optimal MODCODs, please refer to the table at the bottom of the sheet.
  • For the upcoming release of the MDM6100 which will also be able to carry transport streams without any encapsulation (MPEG frames are directly injected into baseband frames), the encapsulation can then be switched off.
  • No label: GSE label addressing is not added. Remote terminals will filter out the data for their destination using the ISI mechanism (which leads to a maximum of 255 channels).Short label (3 bytes): 3 hex bytes are used to address individual channels/terminals. This allows for the addressing of 224 =16 million channels. Additional overhead is about 0.75% (when working with iMix packet sizes).Long label (6 bytes): 6 hex bytes are used to address individual channels/terminals. This allows for the addressing of 248 = virtually unlimited number of channels. Additional overhead is about 1.5% (when working with iMix packet sizes)
  • iMix: this is a standard mix of a typical internet traffic. It contains an typical mix of VoIP, medium size http packets and large packets. Average packet size is 404 bytes.TSoIP (including RTP): This is used in case a TSoIP is transported over satellite as native IP without encapsulating the TS packets first. The most efficient case of 7 TS frames per IP packet is taken which implies an fixed IP packet size of 7*188 + 20 + 8 + 12 = 1356 bytes. More details in the section TSoIP overhead.TSoIP (excluding RTP): This is used in case a TSoIP is transported over satellite as native IP without encapsulating the TS packets first, also here the case if 7 TS frames per IP packets is considered which implies a fixed IP packet size of 7*188 + 20 + 8 = 1344 bytes. More details in the section TSoIP overhead.This field is not applicable when TS mode (TS over ASI or IP) is selected as the transport stream packets are directly encapsulated in DVB-S2 frames without any overhead.
  • The performance data is provided for a FER (Frame Error Rate) of 1E-7 or 1E-3 when available. FER corresponds to BER. However in DVB-S2, BER is not easily measure because in case of link errors complete frames will be dropped. The only indication possible in DVB-S2 is the Frame Error Rate. When doing performance measurements, often a Frame Error Rate of 1E-3 is used because that can be reached in an acceptable time, if measurements are done at FER 1E-7, the measurement cycle would be too long. Performance at 1E-7 is extrapolated from these measurements.
  • Es/No (=C/N+D)Energy per symbol over the noise density. This is the required Es/No threshold in dB for operation in the linear (multiple carrier per transponder) channel. In case the threshold is needed for single carrier per transponder operation, add the “non-linear degradation value” to set the target Es/No (C/N) in the link budget program. This value is also displayed as “C/N” in the right hand side column.
  • The info rate is often used in link budget programs (such as Intelsat’s LST5) and the encapsulation overhead is entered as an additional percentage

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