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| Content Provider | IET Digital Library |
|---|---|
| Author | Dalzell, William G. Cowan, Colin F. N. |
| Abstract | The prediction-error filter is a well-known tool for blind communication channel equalisation. For multipath channels, it has two disadvantages considered here. First, in transversal form, it must be substantially longer than the impulse response of the channel, with a consequent high computation cost; second, it cannot fully equalise mixed-phase channels. Here, the authors examine a recursive version of the linear predictor, used with additional prediction delay for blind channel-shortening of multipath channels with multi-carrier modulation signals using a cyclic prefix. The recursive mode of operation allows the filter length to be significantly shorter than in the transversal, non-recursive form. In tests using modelled channels, they observe two significant results. First, for channels that include maximum-phase terms, the additional prediction delay ameliorates the filter response to maximum-phase terms. Thus, channel-shortening may be achieved, at least partially, unless the maximum-phase terms are severe. Second, the recursive prediction-error filter impulse response adapts to a stable minimum-phase form. This low-cost technique, then, may be used to augment the use of a cyclic prefix in reducing inter-symbol interference in multipath channels. |
| Starting Page | 1844 |
| Ending Page | 1851 |
| Page Count | 8 |
| ISSN | 17518628 |
| Volume Number | 7 |
| e-ISSN | 17518636 |
| Issue Number | Issue 16, Nov (2013) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-com/7/16 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-com.2012.0583 |
| Journal | IET Communications |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Blind Channel-shortening Blind Communication Channel Equalisation Blind Equalisers Communication Channel Equalisation And Identification Cyclic Prefix Delay Electromagnetic Compatibility Filtering Method in Signal Processing Impulse Response Interference Interference Suppression Intersymbol Interference Intersymbol Interference Reduction Linear Predictor Maximum-phase Term Mixed-phase Channel Equalization Modulation Modulation And Coding Method Multicarrier Modulation Signal Multipath Channel Prediction Delay Recursive Filter Recursive Prediction-error Filter Transient Response |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering Computer Science Applications |
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