Adaptive Video Transmission for OFDMA Systems

Author

Yang, Guang-Hua ; Shen, Dongxu ; Li, Victor O K

Author_Institution

Univ. of Hong Kong, Kowloon

fYear

2007

fDate

2-5 July 2007

Firstpage

707

Lastpage

710

Abstract

An adaptive framework is proposed for multi-user video transmission over orthogonal frequency division multiple access (OFDMA) systems. Utilizing the channel knowledge, a two-step heuristic sub-carrier assignment algorithm is proposed to achieve unequal error protection for the video data. The approach also solves the fairness issue among different users that may be caused by varying channel quality on different sub-carriers. Meanwhile, multi-user channel gain is also achieved. The proposed framework significantly improves the video transmission quality with little extra computational complexity and system overhead.

Keywords

OFDM modulation; computational complexity; frequency division multiple access; video communication; OFDMA system; adaptive video transmission; computational complexity; multiuser channel gain; orthogonal frequency division multiple access system; two-step heuristic sub-carrier assignment algorithm; Base stations; Bit error rate; Computational complexity; Data communication; Downlink; Error correction codes; Frequency conversion; Heuristic algorithms; Signal to noise ratio; Tin;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia and Expo, 2007 IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

1-4244-1016-9

Electronic_ISBN

1-4244-1017-7

Type

conf

DOI

10.1109/ICME.2007.4284748

Filename

4284748