Data-Aided Channel Estimation for Poisson Channels With Inter-Symbol Interference
It has been shown that long pilots should be employed in a Poisson channel with inter-symbol interference to obtain accurate channel estimate, which may reduce the transmission efficiency. In this paper, an iterative data-aided channel estimation and signal detection algorithm is proposed with signi...
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| Vydáno v: | IEEE International Conference on Communications (2003) s. 1 - 6 |
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| Jazyk: | angličtina |
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01.06.2020
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| ISSN: | 1938-1883 |
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| Abstract | It has been shown that long pilots should be employed in a Poisson channel with inter-symbol interference to obtain accurate channel estimate, which may reduce the transmission efficiency. In this paper, an iterative data-aided channel estimation and signal detection algorithm is proposed with significant shortened overhead but can approach the bit-error rate performance under perfect channel state information. In this algorithm, periodic pilots are not required and only one short pilot sequence is utilized to obtain a rough initial channel estimate, which will be strengthened and updated by iteratively employing the blockwise data symbols as additional pilots. It is proved that treating the detected data symbols as pilots is a biased estimation, where the bias is proportional to the bit-error rate. Numerical results show that the proposed approach employing only 20 initial pilots can approach the optimal bound. The same bound needs to be achieved by assigning at least 500 pilots using periodic pilot based channel estimation. |
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| AbstractList | It has been shown that long pilots should be employed in a Poisson channel with inter-symbol interference to obtain accurate channel estimate, which may reduce the transmission efficiency. In this paper, an iterative data-aided channel estimation and signal detection algorithm is proposed with significant shortened overhead but can approach the bit-error rate performance under perfect channel state information. In this algorithm, periodic pilots are not required and only one short pilot sequence is utilized to obtain a rough initial channel estimate, which will be strengthened and updated by iteratively employing the blockwise data symbols as additional pilots. It is proved that treating the detected data symbols as pilots is a biased estimation, where the bias is proportional to the bit-error rate. Numerical results show that the proposed approach employing only 20 initial pilots can approach the optimal bound. The same bound needs to be achieved by assigning at least 500 pilots using periodic pilot based channel estimation. |
| Author | Liu, Beiyuan Gong, Chen Cheng, Julian Xu, Zhengyuan |
| Author_xml | – sequence: 1 givenname: Beiyuan surname: Liu fullname: Liu, Beiyuan organization: University of Science and Technology of China,Key Laboratory of Wireless-Optical Communications, Chinese Academy of Sciences,Hefei,Anhui,China,230027 – sequence: 2 givenname: Chen surname: Gong fullname: Gong, Chen organization: University of Science and Technology of China,Key Laboratory of Wireless-Optical Communications, Chinese Academy of Sciences,Hefei,Anhui,China,230027 – sequence: 3 givenname: Julian surname: Cheng fullname: Cheng, Julian organization: The University of British Columbia,school of Engineering,Kelowna,BC,Canada,V1V 1V7 – sequence: 4 givenname: Zhengyuan surname: Xu fullname: Xu, Zhengyuan organization: University of Science and Technology of China,Key Laboratory of Wireless-Optical Communications, Chinese Academy of Sciences,Hefei,Anhui,China,230027 |
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| Snippet | It has been shown that long pilots should be employed in a Poisson channel with inter-symbol interference to obtain accurate channel estimate, which may reduce... |
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| SubjectTerms | Blind equalizers Channel estimation Photonics Receivers Signal detection Two dimensional displays Wireless communication |
| Title | Data-Aided Channel Estimation for Poisson Channels With Inter-Symbol Interference |
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