(3)
Overview: This paper published by DoCoMo Euro-Labs considers space-time - frequency transmits diversity with orthogonal designs in a broadband OFDM system. On capacity considerations for Gaussian as well as real world signal constellations, it show that the concatenation of an outer error control code, a bit interleaver and orthogonal spatial transmit diversity provides an attractive MIMO scheme which is robust to channel imperfections such as spatial correlation. It proposes an application of orthogonal designs for space-time-frequency transmit diversity and give design criteria which allow using a simple combiner at the receiver also in time-varying and severely frequency-selective channels.
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