EM-based blind LDPC identification in multipath channels
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 invest...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2018-09-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2018153/ |
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| _version_ | 1841539471772745728 |
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| author | Yu LIU Fanggang WANG Jingwen ZHANG Bo AI Zhangdui ZHONG |
| author_facet | Yu LIU Fanggang WANG Jingwen ZHANG Bo AI Zhangdui ZHONG |
| author_sort | Yu LIU |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-fa7ee7b447a04f018124bcfee77b0da5 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2018-09-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-fa7ee7b447a04f018124bcfee77b0da52025-01-14T07:15:24ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2018-09-0139434859720410EM-based blind LDPC identification in multipath channelsYu LIUFanggang WANGJingwen ZHANGBo AIZhangdui ZHONGAs 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.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2018153/cognitive radiosmultipath fading channelblind encoder identificationLDPCEM algorithm |
| spellingShingle | Yu LIU Fanggang WANG Jingwen ZHANG Bo AI Zhangdui ZHONG EM-based blind LDPC identification in multipath channels Tongxin xuebao cognitive radios multipath fading channel blind encoder identification LDPC EM algorithm |
| title | EM-based blind LDPC identification in multipath channels |
| title_full | EM-based blind LDPC identification in multipath channels |
| title_fullStr | EM-based blind LDPC identification in multipath channels |
| title_full_unstemmed | EM-based blind LDPC identification in multipath channels |
| title_short | EM-based blind LDPC identification in multipath channels |
| title_sort | em based blind ldpc identification in multipath channels |
| topic | cognitive radios multipath fading channel blind encoder identification LDPC EM algorithm |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2018153/ |
| work_keys_str_mv | AT yuliu embasedblindldpcidentificationinmultipathchannels AT fanggangwang embasedblindldpcidentificationinmultipathchannels AT jingwenzhang embasedblindldpcidentificationinmultipathchannels AT boai embasedblindldpcidentificationinmultipathchannels AT zhangduizhong embasedblindldpcidentificationinmultipathchannels |