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 |