Name
Title | ||
|---|---|---|
A Soft-Switching Blind Equalization Scheme via Convex Combination of Adaptive Filters |
Abstract | ||
|---|---|---|
Blind equalizers avoid the transmission of pilot sequences, allowing a more efficient use of the channel bandwidth. Normally, after a first rough equalization is achieved, it is necessary to switch these equalizers to a decision-directed (DD) mode to reduce the steady-state mean-square error (MSE) to acceptable levels. The selection of an appropriate MSE threshold for switching between the blind and the DD modes is critical to obtain a good overall performance; however, this is not an easy task, since it depends on several factors such as the signal constellation, the communication channel, or the signal-to-noise ratio. In this paper, we propose an equalization scheme that adaptively combines a blind and a DD equalizers running in parallel. The combination is itself adapted in a blind manner, and as a result the overall scheme can automatically switch between the component filters, avoiding the need to set the transition MSE level a priori. The performance of our proposal is illustrated both analytically and through an extensive set of simulations, where we show its advantages with respect to existing hard- and soft-switching equalization schemes. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/TSP.2012.2236835 | IEEE Transactions on Signal Processing |
Keywords | Field | DocType |
adaptive filters,equalisers,mean square error methods,telecommunication channels,MSE,adaptive filters,blind equalizers,blind manner,channel bandwidth,communication channel,convex combination,decision-directed mode,hard-switching equalization schemes,pilot sequences transmission,rough equalization,signal constellation,signal-to-noise ratio,soft-switching blind equalization scheme,soft-switching equalization schemes,steady-state mean-square error,Adaptive signal processing,blind equalizers,convex combination,decision-directed,gradient methods,tracking | Equalization (audio),Control theory,Convex combination,A priori and a posteriori,Communication channel,Constellation diagram,Adaptive filter,Blind equalization,Channel capacity,Mathematics | Journal |
Volume | Issue | ISSN |
61 | 5 | 1053-587X |
Citations | PageRank | References |
8 | 0.55 | 21 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Magno T. M. Silva | 1 | 59 | 6.34 |
| Jeronimo Arenas-Garcia | 2 | 29 | 5.48 |