software receiver platfoms

1. Wireless Information
Technology Lab
Receiver platform
Multi-channel receiver platform for electronic beam-forming and direction finding
Antenna
signal
processor
Antenna
set
Frequency
extension
Digital
signal
processor
Digitizer
Front-end tuner
Four coherent channel with embedded controller structure is used
20-3000MHz RF and 60MHz IF frequencies
SW
Frequency control
Antenna signal processing control
RF
20-3000 MHz
RF
20-3000 MHz
IF
60 MHz
RF
IN
FEU
FEU
FEU
FEU
IF
OUT
FCU
FCU
FCU
FCU
PCI
133 Mbyte/sec
The platform is based on the following main elements: antenna set,
antenna signal processor, frequency extension front-end tuner,
wide-bandwidth digitizer, digital signal processor
LO3
LO2
Embedded
controller
LO1
Physical implementation of the front-end tuner
Antenna elements
Wide-band active antenna elements are used
Domain conversion
Practical Gain
30
G [dB]
25
20
15
10
5
0
0
0,2
0,4
0,6
0,8
1
1,2
1,4
Frequency [GHz]
Antenna signal processing
Antenna #1
Antenna #1
Channel #1
Antenna #2
Antenna #2
Antenna
selection
matrix
Channel #2
Antenna
selection
matrix
8 input 4 output
Channel #3
8 input 4 output
SUM
Four channel 14bit 80Msps converter is used
Channel #4
Antenna #8
Multi-channel processing
Antenna #8
Single-channel processing
Digital signal processing
Radiated signal
Control program of
the antenna selector
and front-end tuner
Data recorder
Measured signals
Signal
processor
Receiver
Time-frequency analyzer
Off-line processing in Matlab
Input parameters
Result display
Output signals
Carrier frequency F
Antenna #1
Antenna system baseline D
Antenna #2
Number of antennas N
Angle of reception B
Type of antenna system
Modulation
Incident
wave
signal
generator
Modulation content
Multipath parameters
Noise parameters
Antenna #N
Number of samples: 1 Ks - 512 Ks
Sample rate: 10 Msps - 80 Msps
Dpt. of Wideband Infocommunications and
Dpt.
Electromagnetic Theory
Goldmann tér. 3. Budapest 1111, HUNGARY