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Volume 32 Issue 8
Sep.  2010
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Mou Qing, Wei Ping. Blind Despreading of Long-code DS-SS Signals with Unknown Carrier Offset[J]. Journal of Electronics & Information Technology, 2010, 32(8): 1797-1801. doi: 10.3724/SP.J.1146.2009.01210
Citation: Mou Qing, Wei Ping. Blind Despreading of Long-code DS-SS Signals with Unknown Carrier Offset[J]. Journal of Electronics & Information Technology, 2010, 32(8): 1797-1801. doi: 10.3724/SP.J.1146.2009.01210

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

doi: 10.3724/SP.J.1146.2009.01210 cstr: 32379.14.SP.J.1146.2009.01210
  • Received Date: 2009-09-11
  • Rev Recd Date: 2009-12-01
  • Publish Date: 2010-08-19
  • 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.
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