| 摘要: |
| 多普勒频偏一直是卫星通信中不可忽视的消极因素。针对多路混叠的卫星扩频信号下变频以后所产生的大多普勒频偏,在匹配滤波结构中采取改进的部分相关算法,在基于并行导频的信道估计中根据信道状况改变估计长度,实现了大频偏下卫星扩频信号的基带处理。 |
| 关键词: 卫星通信 多普勒频偏 扩频通信 信道估计 基带处理算法 现场可编程门阵列 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2004-12-21 |
| 基金项目: |
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| FPGA Implementation of Baseband Processing Algorithms for Satellite Spread Spectrum Signals with Large Frequency Offset |
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| Abstract: |
| Doppler frequency offset is always the passive factor that can't be neglected in satellite communication.To solve the large Doppler frequency offset that comes from the multipath satellite spread spectrum signal,the improved "partial correlation" algorithm is used in matched filter,at the same time the length of estimation is changed according to channel state in channel estimation based on the parallel pilot.The algorithm can accomplish the baseband processing of satellite spread spectrum signal with large Doppler frequency offset. |
| Key words: Satellite communication,Doppler frequency offset,Spread spectrum signal,Channel estimation,Baseband processing algorithm,FPGA |
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