| 移动卫星突发通信全数字接收机设计 |
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| 引用本文： | 陈寅健,李荔,李国通,梁旭文,杨根庆.移动卫星突发通信全数字接收机设计[J].应用科学学报,2001,19(1):20-23. |
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| 作者姓名： | 陈寅健 李荔 李国通 梁旭文 杨根庆 |
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| 作者单位： | 中国科学院上海小卫星工程部, |
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| 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。
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| 关 键 词： | 移动卫星通信 多普勒频偏 快速傅里叶变换 非相干检测 频率捕获 解调器 全数字接收机 |
| 文章编号： | 0255-8297(2001)01-0020-04 |
An Alldigital Receiver for Mobile Satellite Burst Communication |
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| CHEN Yin jian,LI Li,Li Guo tong,LIANG Xu wen,YANG Gen qing.An Alldigital Receiver for Mobile Satellite Burst Communication[J].Journal of Applied Sciences,2001,19(1):20-23. |
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| Authors: | CHEN Yin jian LI Li Li Guo tong LIANG Xu wen YANG Gen qing |
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| 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 noncoherent 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. |
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| Keywords: | mobile satellite communication Doppler frequency offset FFT non-coherent detection |
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