摘要
对特殊情况下数据流设计对偏移正交相移键控(OQPSK)调制信号的影响进行了分析。研究了载荷数据出现长0、长1时,调制输入的I、Q两路数据分别组帧加扰对OQPSK调制信号的影响,分析了I、Q两路数据分别表示不同通道获取的同一目标数据时I、Q两路数据的相关性,讨论了I、Q两路数据的相关性对OQPSK调制信号星座图和频谱的影响。研究可作为后续数传通信链路设计的参考。
The effect of data stream design on offset quadrature phase shift keying （OQPSK） modulating signal in satellite communication was analyzed in this paper. Based on the input signal （I/Q） of modulation the I/Q respectively set date frame scrambling effect on OQPSK signal modulation was studied when payload date stream appeared long 0 or long 1. The correlation of I/Q was analyzed on the data of I/Q respectively obtained the same target data from different channels. The correlation of I/Q for OQPSK signal modulation vector diagram and the influence of spectrum were analyzed. The study would be taken as reference to the subsequent data transmission communication link design.
出处
《上海航天》
2015年第4期47-53,共7页
Aerospace Shanghai
关键词
数据流设计
频谱变形
OQPSK调制
IQ分路组帧
Data stream design
Frequency spectrum distortion
OQPSK modulation
IQ respective framing
