A receiver-based variable-size-burst equalization strategy for spectrally efficient wireless communications

Strategies for improving spectral efficiency in wireless communications, while maintaining quality of service, are proposed. The idea is to make the communication system adapt to the encountered environment. To this end, a time-varying channel model explicitly characterizing changing environments is...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2005-11, Vol.53 (11), p.4304-4314
Main Authors: Bui, F.M., Hatzinakos, D.
Format: Article
Language:English
Subjects:
Adaptive resource allocation
Analysis of variance
Applied sciences
Bursts
channel tracking
Channels
Delay
Detection, estimation, filtering, equalization, prediction
Equalization
Exact sciences and technology
Feedback
Information, signal and communications theory
Intersymbol interference
Iterative methods
Mathematical models
Quality of service
Resource management
semi-blind methods
Signal and communications theory
Signal, noise
Spectra
Strategy
Telecommunications and information theory
Time-varying channels
Tracking
Transmitters
Wireless communication
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Summary:Strategies for improving spectral efficiency in wireless communications, while maintaining quality of service, are proposed. The idea is to make the communication system adapt to the encountered environment. To this end, a time-varying channel model explicitly characterizing changing environments is developed. Under this model, methods for tracking channel stationarity are proposed based on analysis of variance and minimum description length. Tracking enables efficient construction of variable-size data bursts for improved equalization at the receiver. The performance is evaluated first in a training-based equalization framework, then extended to a semi-blind situation. In either case, the obtained results demonstrate feasibility of variable-size burst construction for improving spectral efficiency. The proposed methods are applicable to burst-by-burst or block-based equalization systems, without the requirement of feedback.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2005.857055