介绍了一种适用于二相相移键控（ＢＰＳＫ）扩频调制信号的数字式处理方法。该方法通过对输入的ＢＰＳＫ信号在中频直接进行采样及数字相关，实现了全数字化处理。与传统采用的ＳＡＷ中频模拟处理方法和数字基带处理方法相比，该方法具有结构简单、工作温度范围宽和可靠性高等优点，可用于扩频通信、脉冲压缩雷达和敌我识别（ＩＦＦ）等系统。

This paper proposes a novel digital IF processing method of BPSK signal. By means of the direct IF sampling technique, the digital processing method is realized for BPSK signal. Compared with traditional analog IF method and digital base-band method, this new method has some advantages such as simplicity, temperature insensitiveness and high reliability and can be used in spread-spectrum communication, pulse compression radar and IFF systems.

TN911.72 TN919.63