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针对实际系统中MPSK信号在码元跳变处包络幅度降低,相位跳变不明显,常规算法检测效果不佳的问题。文中提出了一种基于小波变换对MPSK信号进行码元速率估计的新方法。对截获信号进行预处理以减弱跳变处的影响并提高估计的精度。理论分析和实验结果表明,这种算法能有效估计出码元速率,有很高的工程应用价值。
Aiming at the problem that the envelope amplitude of MPSK signal in symbol hopping is reduced, the phase jump is not obvious, and the detection result of conventional algorithm is not good. In this paper, a new method of estimating the symbol rate of MPSK signals based on wavelet transform is proposed. Intercept signals are preprocessed to reduce the effects of jumps and improve the accuracy of the estimates. Theoretical analysis and experimental results show that this algorithm can effectively estimate the symbol rate and has high engineering application value.