English

应用科学学报 ›› 1994, Vol. 12 ›› Issue (4): 409-415.

• 论文 • 上一篇    下一篇

QPSK全数字解调算法

刘泓, 陈景新   

  1. 上海大学嘉定校区
  • 收稿日期:1992-10-09 修回日期:1993-03-26 出版日期:1994-12-31 发布日期:1994-12-31

A DEMODULATION ALGORITHM FOR QPSK oF ALL DIGITAL RECEIVERS

LIU HONG, CHEN JINGXIN   

  1. Shanghai University, Jiading Campus
  • Received:1992-10-09 Revised:1993-03-26 Online:1994-12-31 Published:1994-12-31

PDF

81

被引次数

6

摘要： 提出了一种新颖的数字信号处理算法,对QPSK信号的相位进行数字化处理,从而实现对QPSK信号的解调,文中还对这种算法的噪声性能进行了分析。该算法允许收发两端载波存在频差,无需用锁相实现收发端载波的同步,该算法的计算机模拟结果表明,它是一种有应用前景的新方法。

关键词: 数字信号处理, 正交解调, 载波同步, 数字通信, Kalman滤波

Abstract: In this paper, a new algorithm of digital signal processing for QPSK demodulation is proposed,This algorithm directly processes the phase of the received signal, thus realizing the demodulation of the QPSK。In contrast to other known methods it allows it allows free-running carrier oscillators. The analysis of the noise property of the algorithm is also presented. The computer simulation results indicate that the algorithm is a new method with a bright future for application.

Key words: digital signal processing, carrier synchronization, kalman filter, digital communication, quadrature demodulation