Adaptive tracking of optimal bit and power allocation for OFDM systems in time-varying channels

Sai Kit Lai, Roger S. Cheng, Khaled Letaief, Chi Ying Tsui

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

14 Citations (Scopus)

Abstract

This paper presents an adaptive tracking algorithm for adaptively updating the bit and power allocation for OFDM transmission in a time-varying channel. The proposed algorithm utilities the previous bit allocation information for initialization, and then iteratively refines the allocation until it reaches the optimal solution. We prove a theorem which guarantees the convergence of the algorithm to the optimal solution. Through simulation, we find that the proposed algorithm converges quickly in just a few iterations when the variation in the channel is small. When the channel changes rapidly the adaptive tracking algorithm is still computationally much more efficient than existing algorithms which solve the problem from scratch.

Original languageEnglish
Title of host publication1999 IEEE Wireless Communications and Networking Conference, WCNC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages776-780
Number of pages5
Volume2
ISBN (Electronic)0780356683
ISBN (Print)9780780356689
DOIs
Publication statusPublished - 1999
Externally publishedYes
Event1st IEEE Annual Wireless Communications and Networking Conference, WCNC 1999 - New Orleans, United States
Duration: 21 Sep 199924 Sep 1999

Other

Other1st IEEE Annual Wireless Communications and Networking Conference, WCNC 1999
CountryUnited States
CityNew Orleans
Period21/9/9924/9/99

Fingerprint

Orthogonal frequency division multiplexing

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Lai, S. K., Cheng, R. S., Letaief, K., & Tsui, C. Y. (1999). Adaptive tracking of optimal bit and power allocation for OFDM systems in time-varying channels. In 1999 IEEE Wireless Communications and Networking Conference, WCNC (Vol. 2, pp. 776-780). [796755] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNC.1999.796755

Adaptive tracking of optimal bit and power allocation for OFDM systems in time-varying channels. / Lai, Sai Kit; Cheng, Roger S.; Letaief, Khaled; Tsui, Chi Ying.

1999 IEEE Wireless Communications and Networking Conference, WCNC. Vol. 2 Institute of Electrical and Electronics Engineers Inc., 1999. p. 776-780 796755.

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

Lai, SK, Cheng, RS, Letaief, K & Tsui, CY 1999, Adaptive tracking of optimal bit and power allocation for OFDM systems in time-varying channels. in 1999 IEEE Wireless Communications and Networking Conference, WCNC. vol. 2, 796755, Institute of Electrical and Electronics Engineers Inc., pp. 776-780, 1st IEEE Annual Wireless Communications and Networking Conference, WCNC 1999, New Orleans, United States, 21/9/99. https://doi.org/10.1109/WCNC.1999.796755
Lai SK, Cheng RS, Letaief K, Tsui CY. Adaptive tracking of optimal bit and power allocation for OFDM systems in time-varying channels. In 1999 IEEE Wireless Communications and Networking Conference, WCNC. Vol. 2. Institute of Electrical and Electronics Engineers Inc. 1999. p. 776-780. 796755 https://doi.org/10.1109/WCNC.1999.796755
Lai, Sai Kit ; Cheng, Roger S. ; Letaief, Khaled ; Tsui, Chi Ying. / Adaptive tracking of optimal bit and power allocation for OFDM systems in time-varying channels. 1999 IEEE Wireless Communications and Networking Conference, WCNC. Vol. 2 Institute of Electrical and Electronics Engineers Inc., 1999. pp. 776-780
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