卫星通信中的OQPSK调制技术分析

摘要

The communication quality of the satellite communication system largely depends on the modulation. Offset quadrature phase shift keying （of OQPSK： Offset quadrature the Phase Shift Keying） is proposed on the basis of the QPSK a constant envelope modulation technique. In detail the principles and characteristics of OQPSK modulator based on the OQPSK modulation technique spectral characteristics and the advantages of satellite communications, the results show that： of OQPSK modulation technique has a good spectral efficiency, power efficiency and anti-non-linear characteristics, is suitable for satellite communication channel.%卫星通信系统的通信质量很大程度上依赖于所采用的调制方式。偏移正交相移键控（OQPSK：Offset Quadrature Phase Shift Keying）是在QPSK的基础上提出的一种恒包络调制技术。本文在详细介绍OQPSK调制技术原理和特点的基础上,分析了OQPSK调制技术的频谱特性及其在卫星通信中的优势,结果表明：OQPSK调制技术有良好的频谱效率、功率效率和抗非线性特性,非常适合卫星通信信道。