標題: On the Diversity Order of BICM-OFDM in Doubly Selective Fading Channels
作者: Lin, Hsin-De
Sang, Tzu-Hsien
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Bit-interleaved coded modulation (BICM);diversity order;doubly selective fading channel;orthogonal frequency-division multiplexing (OFDM)
公開日期: 1-五月-2013
摘要: Bit-interleaved coded modulation with orthogonal frequency-division multiplexing (BICM-OFDM) is an attractive approach to achieve time and frequency diversity. Remarkable diversity gain can be obtained when the channel is doubly selective fading. In this paper, the asymptotic diversity orders of BICM-OFDM systems in doubly selective fading channels for both single-input-single-output (SISO) and multiple-input-multiple-output (MIMO) cases are derived. In addition, the system bit-error-rate (BER) behavior in practical situations with moderate signal-to-noise ratios (SNRs) is also investigated. In the SISO case, the diversity order depends on the rank of the channel correlation matrix. Therefore, the channel variations induced by fast fading contribute to improving diversity. In the MIMO case, the diversity order can be further increased when factors such as cyclic delays or phase rolls are introduced. Simulations are provided to verify the analysis.
URI: http://dx.doi.org/10.1109/TVT.2012.2235091
http://hdl.handle.net/11536/21901
ISSN: 0018-9545
DOI: 10.1109/TVT.2012.2235091
期刊: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume: 62
Issue: 4
起始頁: 1866
結束頁: 1871
顯示於類別:期刊論文


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