Name
Title | ||
|---|---|---|
Analysis and design of timing recovery schemes for DMT systems over indoor power-line channels |
Abstract | ||
|---|---|---|
Discrete multitone (DMT) modulation is a suitable technique to cope with main impairments of broadband indoor power-line channels: spectral selectivity and cyclic time variations. Due to the high-density constellations employed to achieve the required bit-rates, synchronization issues became an important concern in these scenarios. This paper analyzes the performance of a conventional DMT timing recovery scheme designed for linear time-invariant (LTI) channels when employed over indoor power lines. The influence of the channel cyclic short-term variations and the sampling jitter on the system performance is assessed. Bit-rate degradation due to timing errors is evaluated in a set of measured channels. It is shown that this synchronization mechanism limits the system performance in many residential channels. Two improvements are proposed to avoid this end: a new phase error estimator that takes into account the short-term changes in the channel response, and the introduction of notch filters in the timing recovery loop. Simulations confirm that the new scheme eliminates the bit-rate loss in most situations. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1155/2007/48931 | EURASIP J. Adv. Sig. Proc. |
Keywords | Field | DocType |
broadband indoor power-line channel,timing recovery loop,system performance,measured channel,dmt system,timing error,conventional dmt timing recovery,timing recovery scheme,indoor power line,cyclic time variation,channel response,channel cyclic short-term variation | Telecommunications,Clock recovery,Code rate,Computer science,Electronic engineering,Electric power transmission,Artificial intelligence,Jitter,Discrete system,Computer vision,Synchronization,Communication channel,Gigue | Journal |
Volume | Issue | ISSN |
2007 | 1 | 1687-6180 |
Citations | PageRank | References |
2 | 0.43 | 8 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| José Antonio Cortés | 1 | 63 | 9.62 |
| L. Díez | 2 | 141 | 23.21 |
| Eduardo Martos-Naya | 3 | 122 | 23.68 |
| Francisco Javier Cañete | 4 | 13 | 4.80 |
| José Tomás Entrambasaguas | 5 | 6 | 1.34 |