符号速率相关的带通采样速率选取及其仿真

带通采样速率选取是软件无线电技术的关键问题之一。分析了常用带通采样速率选取方法的不足：采样速率一般不是符号速率的整数倍，后续基带数字信号处理需要进行复杂的小数内插或抽取算法运算，实现相当困难且运算量很大。为解决这一问题，提出了一种实用的与符号速率相关的带通采样速率选取方法，在满足带通采样定理基础上，附加频谱间隔最大条件选取符号速率整数倍的采样速率，最后通过软件仿真验证了符号速率相关的带通采样速率选取方法的正确性和可行性。

Selection and Simulation of Band-pass Sampling Rate with Symbol Rate Correlation

Selection of band-pass sampling rate is a key problem of the software radio technology. In this paper, the usual selection method and its drawback of band-pass sampling rate are analyzed： The sampling rate is not an integral multiples of the symbol rate and the digital signal processing of the base band needs complex fractional multiple interpolating or sampling which is difficult . In order to solve the problem, a practical selection method of band-pass sampling rate with symbol rate correlation is proposed. A method of selecting the sampling rate with integral multiple of the symbol rate based on the maxim gap between the spetrums is presented. Finally the correctness and feasibility of the method is validated by software simulation .