Overview
The COM-1001SOFT is a digital BPSK/QPSK/OQPSK demodulator written in VHDL, including front-end signal conditioning, demodulation and ancillary test features. The code is portable to most FPGAs.
- PSK demodulation
- BPSK, QPSK, OQPSK
- Programmable symbol rate up to fclk/4
- Selectable root raised cosine filter: 20,25,40% rolloff
- Differential/non-differential decoding
- 4-bit soft-quantized demodulated output
- Continuous mode operation (i.e. Burst mode is not supported)
- Extensive monitoring: carrier lock, frequency error, AGC gain, SNR estimate
- Matlab stimulus generation and VHDL test bench
- Performance:
- Implementation losses < 0.5 dB at Eb/No = 1 dB
- Tracking down to -2 dB Eb/No
- Very small device utilization
- Frequency acquisition range:
- +/- 1% of the symbol rate
- +/- 10% of the symbol rate with AFC enabled (manual enable/disable)
Documentation
Specifications
Complete VHDL/IP Core license agreement