卫星通信中SOQPSK-TG恒包络信号的极化分集接收技术

发布时间：2018-01-16 15:04

本文关键词：卫星通信中SOQPSK-TG恒包络信号的极化分集接收技术　出处：《南京航空航天大学学报》2014年06期 　论文类型：期刊论文

【摘要】：针对卫星通信功率受限、带宽受限、功放非线性等特点,提出采用极化分集接收技术对成形偏移正交相移键控(Shaped offset quadrature phase shift keying,SOQPSK)信号进行解调。利用SOQPSK信号部分响应形式SOQPSK-TG的恒包络、高频谱利用率特点以满足现代卫星通信需求。引入极化分集接收技术,通过最大比合并获得分集增益,可使经历了衰落且相对独立的多路信号相互补偿,改善输出信噪比。仿真结果表明,在最大衰落深度20dB条件下,本文所提算法与传统单路解调相比可获得5~10dB平均信噪比增益,能够克服单路解调存在的深零点影响,有效解决了因卫星姿态变化引起的通信中断问题,显著提高了系统性能。
[Abstract]:Aiming at the characteristics of limited power, limited bandwidth and nonlinear power amplifier, etc. A polarimetric diversity receiving technique is proposed for shaping offset offset quadrature phase shift keying. The SOQPSK) signal is demodulated and the constant envelope of SOQPSK-TG is obtained by using the SOQPSK signal partial response form. In order to meet the needs of modern satellite communication, the polarization diversity reception technology is introduced to obtain diversity gain through the combination of maximum ratio, which can compensate each other for the multichannel signal which has experienced fading and is relatively independent. The simulation results show that under the maximum fading depth of 20 dB, the proposed algorithm can obtain an average SNR gain of 5 ~ 10 dB compared with conventional single-channel demodulation. It can overcome the deep 00:00 effect of single-channel demodulation, effectively solve the communication interruption problem caused by satellite attitude change, and improve the system performance significantly.
【作者单位】：南京航空航天大学电子信息工程学院;
【基金】：国家自然科学基金(61201208)资助项目
【分类号】：TN927.2
【正文快照】： 随着航天技术的发展,卫星通信[1-2]的任务日益繁重,通信容量飞速增长,导致频谱资源十分紧张,各个信道之间的相互干扰是如今亟待解决的问题。由于卫星通信系统的信道具有功率和带宽受限且非线性等特点,因此必须在保证足够功率的同时,尽可能采用高带宽效率的调制方式。传统的BPS

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