COM-1827SOFT SOQPSK modem, VHDL source/IP core

The COM-1827SOFT_SOQPSK_MODEM is a coherent modem for SOQPSK continuous phase modulation with flexible programmable features

• SOQPSK is a spectrum-efficient constant envelope modulation well suited for operation through power amplifiers near saturation
• SOQPSK-MIL and SOQPSK-TG
• Programmable symbol rate up to fclk/4, where fclk is the processing clock frequency
• Excellent BER performance using trellis decoding (SOVA) 4-bit soft-decision demodulator output for best FEC decoder performance
• Near theoretical BER vs Eb/No
• ±50ppm symbol timing tracking
• Carrier frequency acquisition: ±10% of symbol rate at the threshold
• Acquisition threshold < 2dB Eb/No
• Ancillary functions: BER tester, Matlab code for generating sampled stimulus waveforms
• Tested on Xilinx 7-series FPGA, but portable to other FPGA types

The entire VHDL source code is deliverable.
Unlimited license to make and use. See the complete licensing terms at comblock.com/download/softwarelicense.pdf