介绍了一种用于突发QPSK信号的解调器部分电路的设计思路 ,对载波恢复及位同步检测电路作了一定的分析 ,同时对突发信号的检测电路也进行了介绍 ,该解调器适用于HFC网络的上行信道的解调 ,同时也适用于TDMA系统。部分电路计算机仿真能得到较好的设计效果 ,对突发QPSK信号解调器的数字化、集成化有一定的意义 A design idea of ​​a demodulator circuit for burst QPSK signal is introduced. The circuit of carrier recovery and bit synchronization detection is analyzed. At the same time, the detection circuit of burst signal is also introduced. The demodulation The device is suitable for the demodulation of the uplink channel of the HFC network and also for the TDMA system. Part of the circuit computer simulation can get better design results, the burst QPSK signal demodulator digital, integrated has some significance