LDPC Code Design for Nonuniform Power-Line Channels
<p/> <p>We investigate low-density parity-check code design for discrete multitone channels over power lines. Discrete multitone channels are well modeled as nonuniform channels, that is, different bits experience various channel parameters. We propose a coding system for discrete multit...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2007-01-01
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| Series: | EURASIP Journal on Advances in Signal Processing |
| Online Access: | http://asp.eurasipjournals.com/content/2007/076146 |
| _version_ | 1819202203264483328 |
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| author | Sanaei Ali Ardakani Masoud |
| author_facet | Sanaei Ali Ardakani Masoud |
| author_sort | Sanaei Ali |
| collection | DOAJ |
| description | <p/> <p>We investigate low-density parity-check code design for discrete multitone channels over power lines. Discrete multitone channels are well modeled as nonuniform channels, that is, different bits experience various channel parameters. We propose a coding system for discrete multitone channels that allows for using a single code over a nonuniform channel. The number of code parameters for the proposed system is much greater than the number of code parameters in conventional channel. Therefore, search-based optimization methods are impractical. We first formulate the problem of optimizing the rate of an irregular low-density parity-check code, with guaranteed convergence over a general nonuniform channel, as an iterative linear programming which is significantly more efficient than search-based methods. Then we use this technique for a typical power-line channel. The methodology of this paper is directly applicable to all decoding algorithms for which a density evolution analysis is possible.</p> |
| first_indexed | 2024-12-23T04:00:17Z |
| format | Article |
| id | doaj.art-0520e707c55a473da9fbb2d650d7296c |
| institution | Directory Open Access Journal |
| issn | 1687-6172 1687-6180 |
| language | English |
| last_indexed | 2024-12-23T04:00:17Z |
| publishDate | 2007-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Advances in Signal Processing |
| spelling | doaj.art-0520e707c55a473da9fbb2d650d7296c2022-12-21T18:00:44ZengSpringerOpenEURASIP Journal on Advances in Signal Processing1687-61721687-61802007-01-0120071076146LDPC Code Design for Nonuniform Power-Line ChannelsSanaei AliArdakani Masoud<p/> <p>We investigate low-density parity-check code design for discrete multitone channels over power lines. Discrete multitone channels are well modeled as nonuniform channels, that is, different bits experience various channel parameters. We propose a coding system for discrete multitone channels that allows for using a single code over a nonuniform channel. The number of code parameters for the proposed system is much greater than the number of code parameters in conventional channel. Therefore, search-based optimization methods are impractical. We first formulate the problem of optimizing the rate of an irregular low-density parity-check code, with guaranteed convergence over a general nonuniform channel, as an iterative linear programming which is significantly more efficient than search-based methods. Then we use this technique for a typical power-line channel. The methodology of this paper is directly applicable to all decoding algorithms for which a density evolution analysis is possible.</p>http://asp.eurasipjournals.com/content/2007/076146 |
| spellingShingle | Sanaei Ali Ardakani Masoud LDPC Code Design for Nonuniform Power-Line Channels EURASIP Journal on Advances in Signal Processing |
| title | LDPC Code Design for Nonuniform Power-Line Channels |
| title_full | LDPC Code Design for Nonuniform Power-Line Channels |
| title_fullStr | LDPC Code Design for Nonuniform Power-Line Channels |
| title_full_unstemmed | LDPC Code Design for Nonuniform Power-Line Channels |
| title_short | LDPC Code Design for Nonuniform Power-Line Channels |
| title_sort | ldpc code design for nonuniform power line channels |
| url | http://asp.eurasipjournals.com/content/2007/076146 |
| work_keys_str_mv | AT sanaeiali ldpccodedesignfornonuniformpowerlinechannels AT ardakanimasoud ldpccodedesignfornonuniformpowerlinechannels |