LDPC Encode and Decode QPSK-Modulated Signal in Simulink
Transmit an LDPC-encoded, QPSK-modulated bit stream through an AWGN channel. Demodulate and decode the received signal. Compute the error statistics.
snr variable is initialized using the
InitFcn callback in Model Properties>Callbacks. The
SNR dB parameter in the AWGN Channel block and the
Variance parameter in the QPSK Demodulator Baseband block initialize settings using the
The simulation is configured to process one input frame of data. The Error Rate Calculation block compares the transmitted binary data stream with the information data bits output by the LDPC Decoder block.
For SNR = 1 dB, the error rate is 0.