標題: Detection of Cooperative OFDM Signals in Time-Varying Channels with Partial Whitening of Intercarrier Interference
作者: Wang, Hai-wei
Lin, David W.
Sang, Tzu-Hsien
電機工程學系
Department of Electrical and Computer Engineering
公開日期: 1-Jan-2013
摘要: Cooperative communication can yield spatial diversity gains, but its performance can also suffer severely from the multiple carrier frequency offsets (MCFOs) induced by high-speed relative motion, in addition to Doppler spread. In orthogonal frequency-division multiplexing (OFDM) systems, such performance degradation arises as a result of intercarrier interference (ICI). We have shown previously that, in conventional non-cooperative communication, certain ICI components (called residual ICI) display high normalized autocorrelation and a partial whitening of the residual ICI can significantly benefit OFDM signal detection. In this work, we show that similar whitening can also be employed in cooperative communication to address the MCFO issue mentioned above. As an illustration, we simulate a distributed spatial-frequency block coding (SFBC) OFDM system subject to highly disparate MCFOs, where in the receiver we perform partial whitening of the residual ICI followed by maximum-likelihood sequence estimation (MLSE). The results show that the proposed method can comfortably accommodate a maximum MCFO span well exceeding one subcarrier spacing.
URI: http://hdl.handle.net/11536/124945
ISSN: 2166-9570
期刊: 2013 IEEE 24TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC)
起始頁: 1426
結束頁: 1430
Appears in Collections:Conferences Paper