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Efficient Early Termination Strategy for LDPC Codes in GPS Systems

本站小编 哈尔滨工业大学/2019-10-24

Efficient Early Termination Strategy for LDPC Codes in GPS Systems

Feng Wang, Jin-Hai Li, Jin-Hai Sun, 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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