基于LabVIEW的PSK调制信号的识别

近年来，由于数字调相信号的自身特点，伴随着数字通信的飞速发展，其应用日益广泛，因而研究如何进行数字信号的调制识别就变得十分必要，本文将在LabVIEW开发环境下，结合倍频和直方图方法完成对数字调相信号的识别。倍频和直方图方法识别信号各有优缺点，使用倍频方法，无法识别UQPSK信号，同时直方图无法识别OQPSK信号，故提出一种新思路，通过LabVIEW软件将两者结合，最终通过实验验证了BPSK、QPSK、OQPSK、UQPSK四种信号的完全识别。

Automatic Modulation Recognition of PSK Signal

In recent years, due to the characteristics of digital phase-modulated signal. Along with the rapid develop-ment of digital communications,which is used widely,studying the digital signal modulation recognition becomes neces-sary. as the advantages of virtual instrument, and our study will be in the LabVIEW development environment, com-bined with Frequency multiplication and the histogram method to complete the identification of the digital phase-modu-lated signal. Using frequency multiplication and histogram method to identify signal have both advantages and disadvan-tages,using frequency multiplication method cannot recognize UQPSK signal,and using histogram method cannot identi-fy OQPSK signal at the same time. therefore, putting forward a new train of thought in this article, through Lab-VIEW software to combine two methods to accomplish the recognition of several PSK signals,finally verified the iden-tification of four types signals BPSK,QPSK,OQPSK and UQPSK fully by simulation experiments.