一种卫星数传通信频谱异常分析  

Abnormity Analysis of Frequency Spectrum in Satellite Data Transmission Communication

作　　者：江洁 陈劼 钟鸣 

机构地区：[1]上海航天电子技术研究所,上海201109

出　　处：《通信技术》2015年第7期784-789,共6页Communications Technology

摘　　要：优秀的数传通信链路设计应该能够适应各种情况下的数据传输,某卫星数传分系统在设计初期,发现调制后的频谱异常,分析了特殊情况下数据流设计对偏移正交相移键控(OQPSK)调制信号的影响,找出了卫星数传链路频谱异常的原因。重点分析特殊情况下的输入数据和数据基带处理中组帧加扰方式对OQPSK调制信号星座图和频谱产生的影响,提出适合数传通信链路设计的建议。Excellently designed data transmission chain should be seasoned to any data transmission under various situations. The initial design of a satellite data transmission subsystem indicates the abnormity of frequency spectrum after OQPSK modulation, and the effect analysis of data stream design on OQPSK （Offset Quadrature Phase Shift Keying） modulating signal in special conditions, reveals the reason for frequency spectrum abnormity of satellite data transmission. This paper emphatically discusses the effect of framing scrambling on OQPSK modulating signal constellation and frequency spectrum in data input and data base- band processing, and gives the suggestions suitable for the design of data transmission communication chain.

关 键 词：数据流设计 频谱变形 OQPSK调制 

分 类 号：TN929.5[电子电信—通信与信息系统]