阻塞式干扰环境下LDPC编码跳频通信优化方案
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摘要
为进一步提升阻塞式干扰环境下跳频通信系统的抗干扰能力,在信道估计良好的情况下,利用混合信道下优化的低密度奇偶校验码(LDPC)度序列对跳频通信系统进行了改进。仿真验证2048码长、0.5码率在40%删除概率度优化序列下的性能较高斯信道下优化度序列性能在10-5误码率下提升0.62 dB。并针对实际作战使用问题提出了一种低复杂度的折中的使用方案。
In order to further improve the anti-interference ability of frequency-hopping communication system over blocking interference. Under the well channel estimation,the frequency-hopping communication system has been improved by the optimizing degree sequences of LDPC codes over mixed channel. It has been proved by simulation that the performance of the codes in which 2048 code length and 0.5 code rate improves 0.62 dB under the optimizing degree sequences of erasure probabilities than that over the Gaussian channel by the error rate of 10-5. It also provides a less complicated compromise proposal aiming at its use in actual fight.
In order to further improve the anti-interference ability of frequency-hopping communication system over blocking interference. Under the well channel estimation,the frequency-hopping communication system has been improved by the optimizing degree sequences of LDPC codes over mixed channel. It has been proved by simulation that the performance of the codes in which 2048 code length and 0.5 code rate improves 0.62 dB under the optimizing degree sequences of erasure probabilities than that over the Gaussian channel by the error rate of 10-5. It also provides a less complicated compromise proposal aiming at its use in actual fight.
引文
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[17]JILEI H,PAUL H,LAURENCE B M. Performance analysisand code optimization of low density parity-check codes onrayleigh fading channels[J]. IEEE Journal on SelectedAreas in Communicaitons,2001,19(5):924-934.
[2]MACKEY D J C. Good error-correcting codes based on verysparse matrices[J]. IEEE Transactions on InformationTheory,1999,45(2):399-431.
[3]HOU Y,LIU R,PENG H,et al. High throughput pipelinedecoder for LDPC convolutional codes on GPU[J]. IEEECommunication Letters,2015,19(12):2066-2069.
[4]薛明浩,马林华.基于LDPC码的跳频抗干扰性能[J].计算机应用,2011,31,(8):2037-2039.
[5]姚富强.通信抗干扰工程与实践[M].北京:电子工业出版社,2008.
[6]戴精科,徐东辉,何恒,等.LDPC编码FFH/MFSK系统的性能分析[J].信息安全与通信保密,2014,36(9):167-169.
[7]DAI J K,GUO W P,XU D H. The performance of LDPCcoded frequency hopping system under follower jamming[C]//Information and Communications Technologies(ICT2014),2014.
[8]孙康宁,马林华.混合信道下LDPC码稳定条件分析及度列优化[J].通信学报,2016,37(9):168-174.
[9]朱毅超,甘良才,熊俊俏.低密度奇偶校验码差分跳频系统的抗干扰性能[J].电波科学学报,2011,26(3):458-465.
[10]查光明,熊贤祚.扩频通信[M].西安:西安电子科技大学出版社,1992.
[11]罗勇.对军用跳频电台的通信侦察与干扰的研究与实现[D].长沙:国防科技大学,2005.
[12]陈静,杨明.超短波跳频通信系统抗宽带阻塞干扰性能分析[J].通信对抗,2013,32(4):12-18.
[13]李森,王洁,马林华.基于粒子群算法的非规则LDPC码度序列设计[J].系统工程与电子技术,2010,32(6):1151-1154.
[14]孙艺,王晓凯,郭大波,等.基于粒子群的数据协调优化算法[J].测量技术学报,2015,29(2):149-157.
[15]JEONGSEOK H,STEVEN W. Low-density parity-checkcodes over gaussian channels with erasures[J].IEEETransaction on InformationTheory,2003,49(7):1801-1809.
[16]TAN W J,CRUZ J R. Analyzing low-density parity-checkcodes on partial response channels with erasures usingdensity evolution[J].IEEE Transactions on Magnetics,2004,40(5):3411-3418.
[17]JILEI H,PAUL H,LAURENCE B M. Performance analysisand code optimization of low density parity-check codes onrayleigh fading channels[J]. IEEE Journal on SelectedAreas in Communicaitons,2001,19(5):924-934.