数字重采样误差对解调性能的影响分析

Analysis on the Effect of Error in Digital Resampling on the Performance of Receiver

采用带通采样的接收端往往要引入数字重采样。研究数字化中频系统中数字重采样误差对解调信噪比的影响。介绍了数字重采样的基本原理以及数字重采样误差产生的原因,分析数字重采样误差对解调性能的影响,并仿真验证了理论分析的正确性。结合典型的调制编码方式对数字重采样误差范围提出了要求,为数字重采样的设计及实现提供了依据。

The receiver with bandpass resample usually needs digital resampling. This paper mainly discuss the influence of error of digital resample on SNR performance in digital IF system. The basic principle of digital resampling was described. And how the resample error come into being and the effect of the resample error on demodulation performance were described then. The correctness of the method is verified by simulation results. At last, requirement for digital resampling error was put forward combined with typical modulation and coding schemes.