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应用科学学报 ›› 2001, Vol. 19 ›› Issue (1): 20-23.

• 论文 • 上一篇    下一篇

移动卫星突发通信全数字接收机设计

陈寅健, 李荔, 李国通, 梁旭文, 杨根庆   

  1. 中国科学院上海小卫星工程部, 上海 200050
  • 收稿日期:1999-05-11 修回日期:2000-05-29 出版日期:2001-03-31 发布日期:2001-03-31
  • 作者简介:陈寅健(1975-),男,浙江桐乡人,博士生.

An All-digital Receiver for Mobile Satellite Burst Communication

CHEN Yin-jian, LI Li, Li Guo-tong, LIANG Xu-wen, YANG Gen-qing   

  1. Shanghai Micro-satellite Department of Chinese Academic of Science, Shanghai 200050, China
  • Received:1999-05-11 Revised:2000-05-29 Online:2001-03-31 Published:2001-03-31

PDF

167

被引次数

6

摘要： 移动卫星突发通信具有通信速率低、频率偏移大、频率变化快、突发帧短等特点,常规的解调器不能满足要求,文中提出了一种新的基于FFT频率捕获和非相干检测的DPSK/DQPSK全数字解调器结构.仿真结果表明,该解调器具有频率捕获范围宽、频率捕获时间短等特点,适合在低轨道移动卫星突发通信场合使用.

关键词: 多普勒频偏, 移动卫星通信, 快速傅里叶变换, 非相干检测

Abstract: Mobile satellite burst communication operates under severe noise conditions, large Doppler offset, fast Doppler frequency shifts, and multi-path fading, so synchronization in receiver becomes very difficult, especially when the burst frame is too short. This paper proposes a new all-digital receiver structure, which relies on FFT-based burst acquisition and non-coherent detection. Simulation results demonstrate that the receiver can work under large frequency offset and have short acquisition time, so that can be used in mobile satellite burst communication.

Key words: FFT, non-coherent detection, mobile satellite communication, Doppler frequency offset

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