Name
Title | ||
|---|---|---|
Markov Chain Monte Carlo Detection for Frequency-Selective Channels Using List Channel Estimates |
Abstract | ||
|---|---|---|
In this paper, we develop a statistical approach based on Markov chain Monte Carlo (MCMC) techniques for joint data detection and channel estimation over time-varying frequency-selective channels. The proposed detector, that we call MCMC with list channel estimates (MCMC-LCE), adopts the Gibbs sampler to find a list of mostly likely transmitted sequences and matching channel estimates/impulse responses (CIR), to compute the log-likelihood ratio (LLR) of transmitted bits. The MCMC-LCE provides a low-complexity means to approximate the optimal maximum a posterior (MAP) detection in a statistical fashion and is applicable to channels with long memory. Promising behavior of the MCMC-LCE is presented using both synthetic channels and real data collected from underwater acoustic (UWA) channels whose large delay spread and time variation have been the main motivation for the developed system. We also adopt an adaptive variable step-size least mean-square (VSLMS) algorithm for channel tracking. We find that this choice, which does not require prior knowledge on the CIR statistics, is a good fit for UWA channels. Superior performance of the MCMC-LCE over turbo minimum mean-square-error (MMSE) equalizers is demonstrated for a variety of channels examined in this work. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/JSTSP.2011.2172913 | J. Sel. Topics Signal Processing |
Keywords | Field | DocType |
markov chain monte carlo detection,data detection,turbo minimum mean-square-error equalizers,underwater acoustic channels,channel tracking,gibbs sampler,list channel estimates,synthetic channel,log-likelihood ratio,channel estimation,underwater acoustic communication,markov chain monte carlo,frequency-selective channels,time-varying frequency-selective channel,turbo equalization,monte carlo methods,impulse response,adaptive variable step-size least mean-square algorithm,equalisers,underwater acoustic channel,markov processes,intersymbol interference,long memory,least mean square,markov process,detectors,log likelihood ratio,underwater acoustics,data collection,minimum mean square error,decoding | Monte Carlo method,Mathematical optimization,Intersymbol interference,Markov process,Markov chain Monte Carlo,Computer science,Delay spread,Communication channel,Algorithm,Speech recognition,Decoding methods,Gibbs sampling | Journal |
Volume | Issue | ISSN |
5 | 8 | 1932-4553 |
Citations | PageRank | References |
5 | 0.46 | 29 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Hong Wan | 1 | 223 | 28.27 |
| Rong-Rong Chen | 2 | 70 | 10.31 |
| Jun Won Choi | 3 | 307 | 34.04 |
| Andrew C. Singer | 4 | 1224 | 104.92 |
| James C. Preisig | 5 | 612 | 54.23 |
| Behrouz Farhang-Boroujeny | 6 | 972 | 84.30 |