Wireless LAN White Papers
Space-Time-Frequency Transmit Diversity in Broadband Wireless OFDM Systems
Overview This paper considers space-time -frequency transmits diversity with orthogonal designs in a broadband OFDM system. Based on capacity considerations for Gaussian as well as real world signal constellations, it shows that the concatenation of an outer error control code, a bit interleaver and orthogonal spatial transmit diversity provides an attractive MIMO scheme which is simple and fairly robust to channel imperfections such as spatial correlation or keyhole effects. Particularly, the paper discusses orthogonal transmit diversity versus spatial multiplexing and space-time-frequency codes which have been discussed in literature recently. Furthermore, the paper proposes a simple and pragmatic application of orthogonal designs for space-time-frequency transmit diversity and give design criteria which allow to use a simple combiner at the receiver also in time-varying and severely frequency-selective channels.
| Publisher | DoCoMo Euro-Labs | File Format | |
|---|---|---|---|
| Date Published | September 2003 | Downloads | 1 |
| Format | White Papers | ||
| Topics | |||
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