Abstract
为改善多元位置相移键控(MPPSK)的解调性能，提出一种改进的MPPSK调制方案并推导出其功率谱表达式，与实际功率谱的对比验证了该理论表达式的正确。分析了不同调制参数与新调制方式对功率谱的影响。仿真结果表明改进MPPSK的调制信号与原MPPSK信号的功率谱和频谱利用率基本一致，但解调性能显著更优。 An improved M-ary phase position shift keying (MPPSK) modulation is introduced to enhance the demodulation abilities. The power spectra density (PSD) is derived, and its correctness is verified by comparing it with the practical PSD in simulation experiment. The influence of various para-meters and the improved modulation itself on PSD is analyzed. Simulation results demonstrate that the Bit Error Rate (BER) performance of this improved MPPSK modulation is much superior to its original version while its PSD and spectrum efficiency keeps almost unchanged.
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