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Supervised by Ministry of Industry and Information Technology of The People's Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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Related citation:Feng Wang,Jin-Hai Li,Jin-Hai Sun,Yue-Peng Yan.Efficient Early Termination Strategy for LDPC Codes in GPS Systems[J].Journal of Harbin Institute Of Technology(New Series),2013,20(6):118-122.DOI:10.11916/j.issn.1005-9113.2013.06.017.
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Efficient Early Termination Strategy for LDPC Codes in GPS Systems
Author NameAffiliation
Feng Wang Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China 
Jin-Hai Li Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China 
Jin-Hai Sun Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China 
Yue-Peng Yan Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China 
Abstract:
By exploiting the structural features of L1C messages, a novel Early Termination (ET) strategy is proposed to speed up the decoding of low-density parity-check (LDPC) codes in the GPS system. The proposed strategy is based on the cyclic redundancy check (CRC) of the messages in the subframes 2 and 3. The simulation results show that average number of iterations of the proposed strategy is less than that of the standard ET strategy, with nearly no degradation in decoding performance. Besides, the proposed ET strategy can be efficiently implemented in a sequential or parallel manner. Thus, the proposed ET strategy is attractive for practical purposes.
Key words:  GPS system, low-density parity-check (LDPC) codes, early termination (ET) strategy, cyclic redundancy check (CRC)
DOI：10.11916/j.issn.1005-9113.2013.06.017
Clc Number:TN911.22
Fund:

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