Reduction of feedback overload by exploiting adaptive channel in OFDMA systems

Satoru Iijima, Rui Zhou, Iwao Sasase

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

In channel adaptive OFDMA systems, it is important to feed back channel information in a fast, accurate and efficient way to improve the system performance. However, base station requires a large amount of feedback information of channel state information (CSI) in the adaptive channel. In order to reduce the overload of CSI feedback, we propose a feedback scheme which only selects the users scheduled in the next time slot to feed back the channel information according to user mobility. We use adaptive modulation to apply bit rate adaptation depending on user channel condition, where the scheduling time is fixed. By fixing the packet size, scheduling time and feedback period can be fit to different time slots according to user transmission rate. We demonstrate by computer simulation that the proposed scheme can reduce the overload of user feedback with the minimum suppression of the throughput degradation.

Original languageEnglish
Title of host publicationIEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings
Pages153-156
Number of pages4
DOIs
Publication statusPublished - 2007
Event2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, PACRIM - Victoria, BC, Canada
Duration: 2007 Aug 222007 Aug 24

Other

Other2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, PACRIM
CountryCanada
CityVictoria, BC
Period07/8/2207/8/24

Fingerprint

Feedback
Channel state information
Scheduling
Adaptive modulation
Adaptive systems
Base stations
Throughput
Degradation
Computer simulation

ASJC Scopus subject areas

  • Signal Processing

Cite this

Iijima, S., Zhou, R., & Sasase, I. (2007). Reduction of feedback overload by exploiting adaptive channel in OFDMA systems. In IEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings (pp. 153-156). [4313200] https://doi.org/10.1109/PACRIM.2007.4313200

Reduction of feedback overload by exploiting adaptive channel in OFDMA systems. / Iijima, Satoru; Zhou, Rui; Sasase, Iwao.

IEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings. 2007. p. 153-156 4313200.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Iijima, S, Zhou, R & Sasase, I 2007, Reduction of feedback overload by exploiting adaptive channel in OFDMA systems. in IEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings., 4313200, pp. 153-156, 2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, PACRIM, Victoria, BC, Canada, 07/8/22. https://doi.org/10.1109/PACRIM.2007.4313200
Iijima S, Zhou R, Sasase I. Reduction of feedback overload by exploiting adaptive channel in OFDMA systems. In IEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings. 2007. p. 153-156. 4313200 https://doi.org/10.1109/PACRIM.2007.4313200
Iijima, Satoru ; Zhou, Rui ; Sasase, Iwao. / Reduction of feedback overload by exploiting adaptive channel in OFDMA systems. IEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings. 2007. pp. 153-156
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