Code-aided Carrier Synchronization via Soft Decision Feedback Based on Early Stopping Criterion

  • LIU Rongke ,
  • LI Manqing ,
  • HOU Yi
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  • School of Electronics and Information Engineering, Beihang University, Beijing 100191, China

Received date: 2011-07-05

  Revised date: 2011-07-26

  Online published: 2012-04-20

Abstract

In order to solve the high complexity and high latency problem in current code-aided carrier synchronization scheme, a new code-aided carrier synchronization scheme which induces an early stopping mechanism is proposed. On the basis of the existing code-aided carrier synchronization structure, the proposed scheme makes decision of the loop signal to noise ratio (SNR) on the fly. The code-aided carrier synchronization will stop after the loop SNR exceeds a predetermined criterion with no performance degradation. With the improved phase estimation method, a carrier signal phase with phase noise can be estimated while the loop SNR also increases. Using 1/2 low density parity check (LDPC) code in simulation, the results show that the number of iteration in the proposed code-aided carrier synchronization decreases by about 50% when the bit error rate is 10-5; with phase noise signals, the performance degradation is less than 0.15 dB as compared with the ideal decoding performance.

Cite this article

LIU Rongke , LI Manqing , HOU Yi . Code-aided Carrier Synchronization via Soft Decision Feedback Based on Early Stopping Criterion[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012 , (4) : 715 -721 . DOI: CNKI:11-1929/V.20111031.1058.008

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