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| Shift-Invariance Coding and Decoding for Multicarrier V-BLAST System |
| Wu Xiao-jun; Li Xing;Wang Ji-long; Wang Chang-ji |
| School of Information Science and Technology; Tsinghua University; Beijing 100084; China |
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Abstract The combining form of the MultiCarrier (MC) technique with the Vertical Bell Labs lAyered Space-Time (V-BLAST) architecture, i.e., the MC V-BLAST system, can better take advantage of the frequency diversity force resulting from the frequency-selective feature in the broadband mobile wireless multimedia communications. This paper explores the decoding problem of the MC V-BLAST system under the downlink frequency-selective fading environment. One novel shift-invariance coding scheme is firstly proposed for the MC V-BLAST system. Successively, by exploiting the above shift-invariance property, a decoding algorithm without knowing Channel State Information (CSI) is derived. Simulations demonstrate the validity of the novel shift-invariance coding scheme and the performance of the decoding algorithm.
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Received: 22 December 2003
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2005, Vol. 27 
