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SHI Zhi-ping, TANG Fa-jian, YAN Hui, GONG Wan-chun. Optimization of Code Aided Carrier Synchronization Algorithm[J]. Journal of University of Electronic Science and Technology of China, 2012, 41(3): 342-347. doi: 10.3969/j.issn.1001-0548.2012.03.003
Citation: SHI Zhi-ping, TANG Fa-jian, YAN Hui, GONG Wan-chun. Optimization of Code Aided Carrier Synchronization Algorithm[J]. Journal of University of Electronic Science and Technology of China, 2012, 41(3): 342-347. doi: 10.3969/j.issn.1001-0548.2012.03.003
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Optimization of Code Aided Carrier Synchronization Algorithm

doi: 10.3969/j.issn.1001-0548.2012.03.003
  • 1.

    National Key Laboratory of Science and Technology on Communications,University of Electronic Science and Technology of China Chengdu 611731

  • Received Date: 2011-05-16
  • Rev Recd Date: 2011-11-25
  • Publish Date: 2012-06-15
  • Considering the small synchronization range of code-aided (CA) carrier recovery algorithms at low signal to noise ratio (SNR), a pilot-code joint assisted carrier synchronization algorithm is proposed. Firstly, through analyzing the impact of pilot structure on synchronization range and accuracy of coarse estimation, a new algorithm for estimating pilot structure and coarse frequency offset is proposed and its mean squared error (MSE) is also derived. And then a pilot-code joint assisted synchronization with large synchronization range and high estimation accuracy is achieved by using pilot symbols with simplified expectation maximization (EM) fine synchronization. Simulations verify that the new algorithm can increase synchronization range greatly without accuracy decrease, which can achieve perfect synchronization with a certain amount of pilot symbols.
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  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Optimization of Code Aided Carrier Synchronization Algorithm

doi: 10.3969/j.issn.1001-0548.2012.03.003
  • 1. National Key Laboratory of Science and Technology on Communications,University of Electronic Science and Technology of China Chengdu 611731
  • Received Date: 2011-05-16
  • Rev Recd Date: 2011-11-25
  • Publish Date: 2012-06-15

Abstract: Considering the small synchronization range of code-aided (CA) carrier recovery algorithms at low signal to noise ratio (SNR), a pilot-code joint assisted carrier synchronization algorithm is proposed. Firstly, through analyzing the impact of pilot structure on synchronization range and accuracy of coarse estimation, a new algorithm for estimating pilot structure and coarse frequency offset is proposed and its mean squared error (MSE) is also derived. And then a pilot-code joint assisted synchronization with large synchronization range and high estimation accuracy is achieved by using pilot symbols with simplified expectation maximization (EM) fine synchronization. Simulations verify that the new algorithm can increase synchronization range greatly without accuracy decrease, which can achieve perfect synchronization with a certain amount of pilot symbols.

SHI Zhi-ping, TANG Fa-jian, YAN Hui, GONG Wan-chun. Optimization of Code Aided Carrier Synchronization Algorithm[J]. Journal of University of Electronic Science and Technology of China, 2012, 41(3): 342-347. doi: 10.3969/j.issn.1001-0548.2012.03.003
Citation: SHI Zhi-ping, TANG Fa-jian, YAN Hui, GONG Wan-chun. Optimization of Code Aided Carrier Synchronization Algorithm[J]. Journal of University of Electronic Science and Technology of China, 2012, 41(3): 342-347. doi: 10.3969/j.issn.1001-0548.2012.03.003
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