【摘要】 本文介绍PCM三次群OQPSK调制解调器的设计,通过计算机模拟,计算了OQPSK信号经过中频滤波后的误码性能.研究了OQPSK信号相干解调的相位模糊问题,提出了解决办法.给出了一种改进型OQPSK调制器方案,并研制出整个OQPSK调制解调器电路.最后给出了实验结果.更多还原

【Abstract】 This paper presents the design on the 34Mb / s OQPSK Modem and analyses of its performance. The BER performance of the OQPSK signals through IF filter is calculated by computer simulation. The ambiguity of the OQPSK demodulator is studied and the problem is solved too. A kind of the improved OQPSK modulator and ist circuits are developed, and the detecting circuits arc also manufactured. The experimental results of this modem are given.更多还原