A Doppler frequency shift estimation and correction algorithm in multi-rate BPSK/DBPSK system is proposed. It eoneentrats on the typical frequency shift correct algorithms as frequency seanning,AFC loop and PLL . By using this new algorithm, the frequency shift that is more than hundreds of times of the bitrates can be corrected effectively. The algorithm is suitable to different bit rates (from hundreds of bps to hundreds of kbps) in BPSK/DBPSK sysyem. It is a good solutionto Doppler frequency shift correction in multi-rate BPSK/DBPSK system. It has been shown by computer simulations, that the method can correct frequency shift of different bit rates in BPSK/DBPSK system effecively and rapidly.%介绍了用于多速率BPSK/DBPSK软件化解调中的一种多普勒频偏矫正方法.该方法综合利用频率扫描和AFC环及PLL等频偏矫正方法，能有效估计和矫正达几十倍甚至几百倍码速的频偏，并能兼顾不同的码速和BPSK，DBPSK两种不同的调制方式，从而解决了在多速率BPSK/DBPSK信号软件化整体解调过程中多普勒频偏的矫正问题.将该方法用于多速率BPSK/DBPSK信号软件化整体解调的计算机仿真实验，收到了良好的效果.
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