Ming-Duo Liu

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Based on Parallel Combinatory Spread Spectrum (PCSS) communication system, an improved PCSS system is proposed with PN sequences serial-parallel combinatory connecting. Using the character of internal memory between information data, optimization treatment is done in the receiver. The system model is built and simulated in AWGN channel, and the properties(More)
In parallel combinatory spread spectrum (PCSS) system, the soft decision of QPSK modulation will make the superposed Pseudo-Noise (PN) sequences lose its correlation, which leads to the failure of the demodulation. According to the characteristics of QPSK modulation, the superposed sequence is mapped to two sequences, and then a new weighed summation(More)
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