Research Article
Impact of Finite Rate Feedback on the Performance of Chunk-based Multiuser OFDM Systems
@INPROCEEDINGS{10.1109/ChinaCom.2013.6694573, author={Li Duoyi and lan tang and xinggan zhang and yechao bai}, title={Impact of Finite Rate Feedback on the Performance of Chunk-based Multiuser OFDM Systems}, proceedings={8th International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2013}, month={11}, keywords={multiuser ofdm resource allocation chunk finite rate feedback}, doi={10.1109/ChinaCom.2013.6694573} }- Li Duoyi
lan tang
xinggan zhang
yechao bai
Year: 2013
Impact of Finite Rate Feedback on the Performance of Chunk-based Multiuser OFDM Systems
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2013.6694573
Abstract
This paper investigates the Weighted Sum Rate Maxi¬miz¬ation (WSRmax) problem with power constraint in multiuser OFDM systems. The resource allocation is imple¬mented by exploiting quantized channel state information (CSI) of pilot subcarriers. The CSI of non-pilot subcarriers is obtained by linear interpolation at the base station (BS). To reduce the complexity of the re¬source allocation, adjacent sub¬carriers are grouped into chunks and all subcarriers within one chunk are allocated to the same user. Three different feedback schemes, including accurate CSI feedback, quantized CSI feedback and partial quantized CSI feedback are considered. By comparing the performance of the three schemes, we find out the impact of finite rate feedback on the performance of chunk-based multiuser OFDM systems.