TAILIEUCHUNG - Báo cáo hóa học: " A Low-Complexity Approach to Space-Time Coding for Multipath Fading Channels"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Low-Complexity Approach to Space-Time Coding for Multipath Fading Channels | EURASIP Journal on Wireless Communications and Networking 2005 3 437-446 2005 M. Kobayashi and G. Caire A Low-Complexity Approach to Space-Time Coding for Multipath Fading Channels Mari Kobayashi Institut Eurecom 2229 Route des Cretes . 193 06904 Sophia-Antipolis Cedex France Email Giuseppe Caire Institut Eurecom 2229 Route des Cretes . 193 06904 Sophia-Antipolis Cedex France Email Received 7 October 2004 Revised 9 March 2005 Recommended for Publication by Richard Kozick We consider a single-carrier multiple-input single-output MISO wireless system where the transmitter is equipped with multiple antennas and the receiver has a single antenna. For this setting we propose a space-time coding scheme based on the concatenation of trellis-coded modulation TCM with time-reversal orthogonal space-time block coding TR-STBC . The decoder is based on reduced-state joint equalization and decoding where a minimum mean-square-error decision-feedback equalizer is combined with a Viterbi decoder operating on the TCM trellis without trellis state expansion. In this way the decoder complexity is independent of the channel memory and of the constellation size. We show that in the limit of large block length the TCM-TR-STBC scheme with reduced-state joint equalization and decoding can achieve the full diversity offered by the MISO multipath channel. Remarkably simulations show that the proposed scheme achieves full diversity for short practical block length and simple TCM codes. The proposed TCM-TR-STBC scheme offers similar superior performance with respect to the best previously proposed schemes at significantly lower complexity and represents an attractive solution to implement transmit diversity in high-speed TDM-based downlink of third-generation systems such as EDGE and UMTS. Keywords and phrases space-time coding trellis-coded modulation joint equalization and decoding. 1. MOTIVATIONS In classical wireless cellular .

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