Space-time transmit diversity scheme for time-dispersive...

Details Space-time transmit diversity scheme for time-dispersive... Space-time transmit diversity scheme for time-dispersive...

2002-04-24

2008-12-30

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Transmitters

C375S296000, C375S316000

Reexamination Certificate

active

07471734

ABSTRACT:
This invention extends Alamouti's scheme for wideband TDMA systems; it then works in conjunction with time-domain equalization. In fact, the present invention envisages time-domain DFE or MLSE equalization (which is more robust than linear frequency-domain equalization) via the use of a training mid-amble to separate adjacent sub-blocks; this mid-amble is used in equalizer training and its direct and inter-symbol interference contributions to the received signal, are subtractively eliminated to facilitate the detection process itself. This approach may be applied to all systems in time-dispersive propagation media, where the burst or slot length is short enough that the fading can be considered time-invariant over its duration.

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