面向卫星直扩通信体制性能分析的群时延波动建模研究

Xiongfei Li, Jiqiang Zhai, Xuemin Sun, Yangming Guo, Guochang Zhou

科研成果: 期刊稿件文章同行评审

摘要

This study introduces the group delay and its characteristics in satellite channel, meanwhile, the model of the impact of group delay ripple on performance of direct sequence spread spectrum communication system is established and simulated for analysis. The simulation results indicate the specific impact of group delay ripple on system, as well as the impact of group delay ripple on the transmission and reception signals in the spread spectrum communication system. For transmission signals in the spread spectrum system, the group delay ripple can worsen the EVM and Eye-diagram of spread spectrum signal, cause signal distortion and the deterioration of noise tolerance. For the reception performance of the spread spectrum system, the group delay ripple has little effect on the spread spectrum acquisition using incoherent accumulation and energy judgment, but it can cause a deterioration in the error performance of the reception signal. For example, when relative group delay increases from 0.011 to 0.9, the error performance decreases by about 2 dB. When designing satellite spread spectrum communication systems, power resources are extremely precious, it is necessary to consider the impact of group delay on the communication system, and take certain measures to reduce the impact of group delay ripple to the system.

投稿的翻译标题Modeling research of group delay ripple on the performance analysis oriented to a satellite direct sequence spread spectrum communication system
源语言繁体中文
页(从-至)92-98
页数7
期刊Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University
43
1
DOI
出版状态已出版 - 2月 2025

关键词

  • group delay ripple
  • modeling research
  • satellite communication
  • spread spectrum communication system

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