文章基本信息

标题：HARQ Combining Scheme based on Channel Impulse Response and Confidence Level
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作者：ZHANG, Cui-fang ; ZENG, Gui-gen
期刊名称：Journal of Multimedia
印刷版ISSN：1796-2048
出版年度：2013
卷号：8
期号：6
页码：770-776
DOI：10.4304/jmm.8.6.770-776
语种：English
出版社：Academy Publisher
摘要：In order to improve the reliability of data transmission, this paper proposes a HARQ combining scheme based on channel impulse response and confidence level in OFDM wireless system. The confidence level of subchannel is obtained according to the position of comb pilot sequence. In the proposed scheme, the same data is retransmitted immediately as soon as NACK is received at the transmitting terminal. The position of comb pilot sequence is changed before IFFT. The each subchannel impulse response is estimated according to received comb pilot sequence at the receiving terminal. The received data in two transmissions is weighted and combined according to channel impulse response and confidence level. Under Rayleigh fading channel environment, simulation experiment shows that this scheme improves combining precision. The BER (Bit Error Rate) is reduced effectively.
关键词：Comb Pilot;Confidence Level;OFDM;HARQ;Channel Impulse Response