Rate-one space-frequency block codes with maximum diversity for MIMO-OFDM

作者：Lei Shao, Sumit Roy · 发表于：IEEE Transactions on Wireless Communications · 年份：2005 · DOI：10.1109/twc.2005.850374 · 被引用次数：62 · 研究领域：Advanced Wireless Communication Techniques、Cooperative Communication and Network Coding、Wireless Communication Networks Research

We propose a novel rate-one (i.e., one symbol per transmission), space-frequency block code (SFBC) for an orthogonal frequency division multiplexing (OFDM) system with transmit (M), and receive (N) antennas that achieves the maximum diversity attainable over frequency-selective channels. Moreover, the space-frequency (SF) code design is shown to be robust to overestimation of the (true) channel order L at the price of increasing decoding complexity. Further, even if the channel order is underestimated (K<L), diversity order of MNK is achieved with commensurately reduced decoding complexity; this allows a natural mechanism for trading diversity for decoding complexity as desired. In addition, since the SF code symbol is transmitted in one OFDM block duration, it has a smaller processing delay than comparable space-time-frequency block codes (STFBC).