A Code-Aided Carrier Synchronization Algorithm Based on APPA

Xu Jun-hui; Liu Zhao-sheng; Zhang Zhong-pei

doi:10.3724/SP.J.1146.2008.01565

Volume 31 Issue 12

Dec. 2010

Turn off MathJax

Article Contents

Article Navigation > Journal of Electronics & Information Technology > 2009 > 31(12): 2834-2837

Xu Jun-hui, Liu Zhao-sheng, Zhang Zhong-pei. A Code-Aided Carrier Synchronization Algorithm Based on APPA[J]. Journal of Electronics & Information Technology, 2009, 31(12): 2834-2837. doi: 10.3724/SP.J.1146.2008.01565

Citation:

Xu Jun-hui, Liu Zhao-sheng, Zhang Zhong-pei. A Code-Aided Carrier Synchronization Algorithm Based on APPA[J]. Journal of Electronics & Information Technology, 2009, 31(12): 2834-2837. doi: 10.3724/SP.J.1146.2008.01565

Citation:

PDF( 208 KB)

A Code-Aided Carrier Synchronization Algorithm Based on APPA

doi: 10.3724/SP.J.1146.2008.01565

Received Date: 2008-11-26
Rev Recd Date: 2009-06-15
Publish Date: 2009-12-19

Abstract

Abstract

The residual frequency and phase offset will make obvious degradations on the Turbo decoding performance under low SNR conditions, and it must introduce some coded-aided carrier synchronization algorithm for the phase estimation. In this paper, an improved residual carrier frequency offset estimation algorithm based on APPA(A Priori Probability Aided)phase estimation is proposed. It uses the extrinsic information obtained from the turbo decoder to aid an iterative phase estimation process. And the loop filter converts the phase error signal to a control word that is used to bias the numerically controlled oscillator. The simulation results show that the algorithm performs successfully with small frequency offset and phase offset at very low SNR(for example, SNR-7.8 dB) and its performance is very close to the optimally synchronized system.

FullText(HTML)

References(1)

References

Gallager R G. Low density parity check codes [J]. IRETransations on Information Technology, 1962, 8(3): 208-220.[2]Berrou C, Blavieux A, and Thitimajshima P. Near Shannonlimit error-correcting coding and decoding: Turbo-codes[C].Proceedings of 1993 IEEE International Conference onCommunications, Geneva: ICC, 1993: 1064-1070.[3]Kenneth, Andrews S, Dolinar S, and Jones R, et al.. Thedevelopment of turbo and LDPC codes for deep-spaceapplications [J].Proceedings of the IEEE.2007, 95(11):2142-2156[4]Nele N and Heidi S. Performance analysis of ML-basedfeedback carrier phase synchronizers for coded Signal[J].IEEE Transactions on Signal Processing.2007, 55(3):1129-1136[5]Noels N, Herzet C, and Dejonghe A. Turbo synchronization:an EM algorithm interpretation [J]. IEEE InternationalConference on Communications, Alaska, 2003, 4(11-15):2933-2937.[6]Kim Pansoo, Choi Kwonhue, and Song Yun-Jeong. Jointcarrier recovery and Turbo decoding method for TDMAburst MODEM under very low SNRs[C]. VehicularTechnology Conference, VTC 2006 -Spring, Piscataway, 2006,Vol.5: 2198-2200.[7]Pan Xiao-hui, Liu Ai-jun, and Zhang Bang-ning, et al..Code-aided iterative carrier estimation in presence of residualfrequency offset [J]. Journal of System Simulation, 2008,20(2): 404-409.[8]Oh Wangrok and Cheun Kyungwhoon. Joint decoding andcarrier phase recovery algorithm for Turbo codes [J]. IEEECommunications Letters, 2001, 5(9): 375-377.[9]Rahamim Y, Freedman A, and Reichman A, et al.. MLiterative soft-decision-directed (ML-ISDD): A carriersynchronization system for short packet turbo codedcommunication [J]. IEEE Transactions on Signal Processing,2008, 56(7): 1169-1177.[10]Valles E, Jones C, and Villasenor J, et al.. Carrier and timingsynchronization of BPSK via LDPC code feedback [C]. Proc.IEEE. Asilomar Conference on Signal System and Computers,Asilomar, 2006: 2177-2181.[11]Zhang Li and Burr A G. Iterative carrier phase recoverysuited to Turbo-coded systems [J].IEEE Transactions onWireless Communications.2004, 3(6):2267-2276

Relative Articles

Supplements(0)

Cited By

Proportional views