基于LabVIEW的PSK调制信号的识别

Automatic Modulation Recognition of PSK Signal

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Lab VIEW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Lab VIEW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。

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