多径信道下基于EM算法的盲LDPC编码器识别研究

doi:10.11959/j.issn.1000-436x.2018153

Journal on Communications ›› 2018, Vol. 39 ›› Issue (9): 43-48.doi: 10.11959/j.issn.1000-436x.2018153

• 5G and Cognitive and Cooperative Network • Previous Articles Next Articles

EM-based blind LDPC identification in multipath channels

Yu LIU,Fanggang WANG,Jingwen ZHANG,Bo AI,Zhangdui ZHONG

State Key Lab of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China

Revised:2018-08-02 Online:2018-09-01 Published:2018-10-19
Supported by:
The Fundamental Research Funds for the Central Universities(2018JBM078);The National Natural Science Foundation of China(61571034);The National Natural Science Foundation of China(61725101);The Natural Science Foundation of Beijing(4182051);The Natural Science Foundation of Beijing(L172020);The Key Laboratory of Universal Wireless Communications,Ministry of Education,P.R.China(KFKT-2018102);The Major Projects of Beijing Municipal Science and Technology Commission Under Grant(Z181100003218010)

Abstract

Abstract:

As the advent of cognitive radios,blind encoder identification has attracted increasingly attentions since it plays an important role.The existing works mainly focus on additive white Gaussian noise (AWGN) channel,while the blind identification in multipath scenarios has not been sufficiently investigated.Considering the blind low density parity-check (LDPC) codes identification in the presence of unknown multipath fading channel,a likelihood-based classifier was proposed using the expectation maximization (EM) algorithm to obtain the maximum likelihood estimates of the unknown parameters.Then,an average log-likelihood ratio (LLR) estimator was adopted to classify the unknown encoder.Numerical results show that the proposed algorithm provides promising identification performance in multipath channels,especially in the low signal-to-noise ratio region.

Key words: cognitive radios, multipath fading channel, blind encoder identification, LDPC, EM algorithm

CLC Number:

TN929

Yu LIU,Fanggang WANG,Jingwen ZHANG,Bo AI,Zhangdui ZHONG. EM-based blind LDPC identification in multipath channels[J]. Journal on Communications, 2018, 39(9): 43-48.

Figures/Tables 4

References 14

[1]	SWAMINATHAN R , MADHUKUMAR A S . Classification of error correcting codes and estimation of interleaver parameters in a noisy transmission environment[J]. IEEE Trans Broadcasting, 2017,63(3): 463-478.
[2]	XIA T , WU H C . Novel blind identification of LDPC codes using average LLR of syndrome a posteriori probability[J]. IEEE Trans Signal Process, 2014,62(3): 632-640.
[3]	XIA T , WU H C , CHANG S Y ,et al. Blind identification of binary LDPC codes for M-QAM signals[C]// IEEE GLOBECOM. 2014: 3532-3536.
[4]	XIAO Y , LEE M H . Adaptive LDPC decoding for multipath channels[C]// The Signal Processing. 2006: 1-4.
[5]	XIA T , WU H C . Joint blind frame synchronization and encoder identification for low-density parity-check codes[J]. IEEE Commun Lett., 2014,18(2): 352-355.
[6]	QIAO Y , YIN X , XU L . Soft iterative detector and semi-blind identification for LDPC-coded MIMO systems in dispersive fading channels[C]// The IEEE WCNC. 2016: 1-6.
[7]	WANG F , WANG X . Fast and robust modulation classification via Kolmogorov-Smirnov test[J]. IEEE Trans Commun, 2010,58(8): 2324-2332.
[8]	ZHANG J , CABRIC D , WANG F ,et al. Cooperative modulation classification for multipath fading channels via expectation maximization[J]. IEEE Trans Wireless Commun, 2017,16(10): 6698-6711.
[9]	DOBRE O A , ABDI A , BAR-NESS Y ,et al. Survey of automatic modulation classification techniques:classical approaches and new trends[J]. IET Commun, 2007,1(2): 137-156.
[10]	WANG F , DOBRE O A , CHAN C ,et al. Fold-based Kolmogorov-Smirnov modulation classifier[J]. IEEE Signal Process Lett, 2016,23(7): 1003-1007.
[11]	HAGENAUER J , OFFER E , PAPKE L . Iterative decoding of binary block and convolutional codes[J]. IEEE Trans Inf Theory, 1996,42(2): 429-445.
[12]	XIE Y , GEORGHIADES C N . Two EM-type channel estimation algorithms for OFDM with transmitter diversity[J]. IEEE Trans Commun, 2003,51(1): 106-115.
[13]	WU H C , SAQUID M , YUN Z . Novel automatic modulation classification using cumulant features for communications via multipath channels[J]. IEEE Trans.Wireless Commun, 2008,7(8): 3098-3105.
[14]	ORLIC V D , DUKIC M L . Multipath channel estimation algorithm for automatic modulation classification using sixth-order cumulants[J]. Electron Lett, 2010,46(19): 1348-1349.

Metrics

Recommended 0

No Suggested Reading articles found!

[1]	Zhongyong WANG, Zhenghao LI, Kexian GONG, Peng SUN, Qingtao LI. Reconstruction of LDPC code check matrix based on random extraction at high bit error rate [J]. Journal on Communications, 2023, 44(3): 128-137.
[2]	Zhaojun WU, Limin ZHANG, Zhaogen ZHONG, Renxin LIU. Reconstruction of sparse check matrix for LDPC at high bit error rate [J]. Journal on Communications, 2021, 42(3): 1-10.
[3]	Zhen WU,Zhibo DU,Min WANG,Chunling XIANG. Template attack of Crypto chip based on clustering [J]. Journal on Communications, 2018, 39(8): 83-93.
[4]	Yong-yan JIANG,Shi-yuan ZHANG. New EM parameter estimation algorithm for a type of micro-motion SFM signal [J]. Journal on Communications, 2017, 38(9): 201-206.
[5]	Wen-he JIN,Shao-hua WU,Er-peng YANG,Qin-yu ZHANG. LDPC convolutional codes coded cooperation based on puncturing [J]. Journal on Communications, 2017, 38(8): 194-200.
[6]	Pei-dong YU,Hua PENG,Ke-xian GONG,Ze-liang CHEN. LDPC code reconstruction based on algorithm of finding low weight code-words [J]. Journal on Communications, 2017, 38(6): 108-117.
[7]	Qing ZHU,Le-nan WU,Yong-biao YANG,Jie LI,Shi-ming XU. Efficient algorithm for calculating short cycles in Tanner graph based on matrix computation [J]. Journal on Communications, 2017, 38(4): 76-85.
[8]	Wei-dong FANG,Wu-xiong ZHANG,Ming-ming HU,Wei CHEN,Yang YANG. Improved LDPC-based short-range frequency-hopping wireless communication system [J]. Journal on Communications, 2017, 38(12): 34-47.
[9]	Ming ZHAO,Xiao-lin ZHANG. Novel construction of QC-LDPC codes with modified 2-D GRS codes [J]. Journal on Communications, 2015, 36(2): 193-199.
[10]	Ke-xiang MA,Ji-cheng SUN,Meng WANG,Yu-ming ZHANG,Hai-lin ZHANG. Improved multi-bits flipping algorithm for high-speed LDPC decoding [J]. Journal on Communications, 2014, 35(2): 0-124.
[11]	. Improved multi-bits flipping algorithm for high-speed LDPC decoding [J]. Journal on Communications, 2014, 35(2): 16-124.
[12]	Guang-hua HE,Bao-ming BAI,Xiao MA,Bing LI. Low-complexity likelihood probability derivation algorithm for non-binary LDPC-coded modulation system [J]. Journal on Communications, 2013, 34(9): 84-91.
[13]	. On the designand performance of nonbinary LDPC codes on burst errorchannels [J]. Journal on Communications, 2013, 34(7): 11-104.
[14]	Bo ZHANG,Wei LIN,Chun-yuan LIU,Bao-ming BAI. On the designand performance of nonbinary LDPC codes on burst errorchannels [J]. Journal on Communications, 2013, 34(7): 98-104.
[15]	Zi-qiang CHEN,Shan OUYANG,Hai-lin XIAO,Yue-lei XIE. Jointed LDPC codes design for half-duplex relay channels [J]. Journal on Communications, 2013, 34(3): 134-140.

EM-based blind LDPC identification in multipath channels

RichHTML

PDF

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 4

References 14

Related Articles 15

Metrics

Recommended 0