Channel prediction heuristics for adaptive modulation in WLAN

• Type: Article in International Conference Proceedings Book
• Date: 2007

Authors

A. Aguiar (Author) FEUP; A. Wolisz (Author) Other

Conference proceedings International

Title: 2007 IEEE 65TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6

Pages: 1091-1095

65th IEEE Vehicular Technology Conference

Dublin, IRELAND, APR 22-25, 2007

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 7 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

CORDIS: Technological sciences > Engineering > Communication engineering

Other information

Authenticus ID: P-008-PGC

DOI: 10.1109/vetecs.2007.232

Abstract (EN): Channel-adaptive techniques increase the efficiency of wireless communications, as they are efficient in coping with the quality variation of the wireless channels. However, channel-adaptive mechanisms require a prediction of the future behaviour of the channel. Heuristics are an important alternative to more complex predictors in WLAN scenarios. In this paper we use WLAN measurement traces for the simulative evaluation of the influence of channel prediction errors in the performance of a threshold-based adaptive modulation scheme, considering also the case of delayed channel feedback. The results show that, as long as the necessary prediction horizon does not exceed 2 ms, assuming the channel to stay constant leads to less than 15% capacity loss compared to the case when perfect channel prediction is used. When farther prediction horizons are needed, the moving average of the received signal should be used for channel prediction.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5