高中频CPM数字接收机设计

本文给出了一种适用于软件无线电的突发模式非相干二进制CPM接收机。该接收机采用前馈结构，利用FFT算法对前导进行捕获和分析，可以快速实现载波频偏和符号定时误差的联合估计，采用多符号检测算法来对CPM信号实现解调。通过仿真和对硬件的需求分析验证了本接收机可以有效检测信号的到来，快速实现载波和符号的联合同步，且比传统接收机具有更低的误码率。相对较低的硬件复杂度也使得接收机容易在FPGA上实现。

Design of High IF CPM Digital Receiver

A burst mode non-coherent binary CPM receiver for software radio is proposed. The feedfbrward structure in the receiver uses FFT algorithm to acquire and analyze the preamble. The quickly joint estimation of carrier offset and symbol timing error is realized. Multi-symbol detection algorithm is used to demodulate the CPM signal. Computer simulation and analysis of hardware requirement demonstrate that with the proposed receiver the signal can be detected effectively ;the integral synchronization of carrier and symbol is realized immediately;and better performance than traditional receiver is gotten. Less hardware complexity lends the receiver to a simple FPFA implementation.