通信学报2017，Vol.38Issue(12)：34-47,14.DOI:10.11959/j.issn.1000-436x.2017284
基于改进LDPC码的短距离跳频无线通信系统
Improved LDPC-based short-range frequency-hopping wireless communication system
摘要
Abstract
In short-range wireless communication system(SWCS),the complex scenarios make its transmission face the diverse interference,and lower hardware resource leads to its limited anti-interference capability.To achieve the reliable transmission,a frequency-hopping-based SWCS(FH-SWCS)with improved LDPC(I-LDPC)code was constructed.In FH-SWCS,a low-complexity check-sum updating(LCU)algorithm was proposed to reduce the amount of computation.LCU-based multi-threshold bit flipping(LCU-MTBF)algorithm was given to increase the reliability of bit-flipping,im-proving decoding performance and reduce the complexity of decoding.The simulation results demonstrate that LCU is suitable for multiple hard decisions decoding algorithm,and it can reduce the computational complexity of original de-coding algorithm without affecting its performance.When BER is 10?5,and iterations number is 5,0.15 dB performance gain can be achieved,and the number of additions algorithm can be reduced about 40％in LCU-MTBF.In FH-SWCS with I-LDPC,when BER is 10?4,and SNR is 15 dB,the performance gain about 7 dB can be achieved to improve the an-ti-interference of the system effectively.关键词
短距离无线通信/低密度奇偶校验/硬判决译码/跳频系统Key words
short-range wireless communication/LDPC/hard decision decoding/frequency hopping system分类
信息技术与安全科学引用本文复制引用
房卫东,张武雄,胡明明,陈伟,杨旸..基于改进LDPC码的短距离跳频无线通信系统[J].通信学报,2017,38(12):34-47,14.基金项目
国家自然科学基金资助项目(No.61471346,No.61461136003) （No.61471346,No.61461136003）
上海市自然科学基金资助项目(No.17ZR1429100) （No.17ZR1429100）
上海市科技创新行动计划基金资助项目(No.17511105903,No.17DZ1200302) （No.17511105903,No.17DZ1200302）
青海省自然科学基金资助项目(No.2016-ZJ-922Q) （No.2016-ZJ-922Q）
CEMEE基金资助项目(No.CEMEE2017K0303B)The National Natural Science Foundation of China (No.61471346,No.61461136003),The Natural Science Foundation of Shanghai (No.17ZR1429100),The Science and Technology Innovation Program of Shanghai (No.17511105903,No.17DZ1200302),The Natural Science Foundation of Qinghai Province (No.2016-ZJ-922Q),CEMEE (No.CEMEE2017K0303B) （No.CEMEE2017K0303B）
