未知频偏下长码直扩信号的盲解扩

牟青; 魏平

doi:10.3724/SP.J.1146.2009.01210

未知频偏下长码直扩信号的盲解扩

doi: 10.3724/SP.J.1146.2009.01210

牟青,
魏平

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- 被引次数: 0
出版历程
- 收稿日期: 2009-09-11
- 修回日期: 2009-12-01
- 刊出日期: 2010-08-19

Blind Despreading of Long-code DS-SS Signals with Unknown Carrier Offset

Mou Qing,
Wei Ping

摘要

摘要: 该文提出一种新的数据模型用于盲解扩含未知频偏的长码直扩信号。它将长码直扩信号重排为含有缺失数据的短码直扩信号，然后扩展使用了短码伪码周期的盲同步算法，最后采用交替投影算法恢复出信号子空间，并用于盲解扩。仿真实验表明提出的方法不受未知载频的影响，在低信噪比下表现了良好的性能。
- 信号处理 /
- 长码直扩信号 /
- 盲解扩 /
- 低秩缺失数据模型 /
- 交替投影算法
Abstract: A novel signal model with missing-data is proposed to directly blindly despread the long-code Direct Sequence Spread Spectrum (DS-SS) signals with unknown carrier frequency. The long-code DS-SS signals are represented as the short-code ones with missing data, and then the blind synchronization algorithm of the short-code DS-SS signals is extended to the long-code ones. Finally, the Alternative Projection (AP) algorithm is used to restore the signal subspace so that blind despreading can be obtained. The simulation results show that the proposed approach is immune to the unknown carrier and show good performance in low-SNR scenarios.
- Signal processing /
- Long-code DS-SS Signals /
- Blind dispreading /
- Low-rank model with missing data /
- Alternative Projection (AP) algorithm

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参考文献(1)

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