Title :
Adaptive Video Transmission for OFDMA Systems
Author :
Yang, Guang-Hua ; Shen, Dongxu ; Li, Victor O K
Author_Institution :
Univ. of Hong Kong, Kowloon
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;
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
DOI :
10.1109/ICME.2007.4284748
