Communication Algorithm 7: Communication System Algorithm Design, bit rate, spread spectrum, and modulation algorithm selection

1. Rate Matching: Bit Rate Selection

Channel environment: AWGN

Signal-to-Noise Ratio: SNR

Bit Rate R: 1/2, 1/3, 1/4, 1/8

Matalb simulation architecture: Source bit + convolution code/Turbo (1/3) + Rate Matching (different R) + PSK modulation + AWGN + PSK demodulation + decoding rate matching + Viterbi/Turbo + Ber

Note: The R bit rate is 1/2, 1/4, and 1/8, and the performance increases.

2. Selection of Spread Spectrum factor SF

Channel environment: AWGN

Signal-to-Noise Ratio: SNR

Spread Spectrum factor SF: 1, 2, 4, 8, 16, 32, 64, 128

Matalb simulation architecture: Source bit + convolution code/Turbo (1/3) + Rate Matching + PSK modulation + spread spectrum + AWGN + unspread spectrum + PSK demodulation + decoding rate matching + Viterbi/Turbo + Ber

Note: The Spread Spectrum factor SF, 128, 4, and increases the performance by in turn.

3. modulation method selection

Channel environment: AWGN

Signal-to-Noise Ratio: SNR

Modulation method: BPSK, PSK, opsk, dqpsk, and 16QAM Performance

Matalb simulation architecture: Source bit + (PSK) modulation + AWGN + (PSK) demodulation + Ber

Note: BPSK: ebno = 9.6db, esno = 9.6db;

PSK: ebno = 9.6db, esno = 12.6db ;.

<For more information and the corresponding Matlab code, contact QQ: 1279682290>

Communication Algorithm 7: Communication System Algorithm Design, bit rate, spread spectrum, and modulation algorithm selection