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通信信号的功率谱分布情况影响着通信系统的传输效率,码宽对功率谱分布的影响较大。针对四相相移键控、二进制频移键控等典型水声通信信号,采用现代功率谱估计方法中基于参数模型的Burg算法,对其功率谱分布进行了估计。重点研究了不同码宽条件下,Burg算法估计信号功率谱的基本特征和分布规律,对码宽对功率谱的影响进行了归纳总结,为扩频通信和典型水声通信信号的设计提供了技术支持。
The power spectrum distribution of communication signal affects the transmission efficiency of the communication system, and the code width has a great influence on the power spectrum distribution. For the typical underwater acoustic communication signals such as quadrature phase shift keying and binary frequency shift keying, the Burg algorithm based on parametric model in the modern power spectrum estimation method is used to estimate the power spectral distribution. Focus on the different code width conditions, Burg algorithm to estimate the signal power spectrum of the basic characteristics and distribution of the width of the code width of the power spectrum were summarized, and for the spread spectrum communication and the design of typical underwater acoustic communication signal provides technology stand by.