Radio communication system

Details Radio communication system Radio communication system

2007-07-31

2007-07-31

Gesesse, Tilahun (Department: 2618)

Telecommunications

Transmitter

Diversity

C455S562100, C375S267000

Reexamination Certificate

active

10156441

ABSTRACT:
A radio communication system comprises a communication channel between a transmitter (106) comprising a plurality of antennas (108) and a receiver (112) comprising at least one antenna. The communication channel is wideband and comprises a plurality of paths, and the transmitter comprises means for splitting data for transmission into a plurality of sub-streams. The receiver comprises fewer antennas than the number of transmitted sub-streams and sampling means for determining at least as many substantially uncorrelated received signal samples as the number of sub-streams.In one embodiment, transmissions on the channel employ code division techniques and the sampling means comprises a Rake receiver. In another embodiment a maximum likelihood technique is used to generate sufficient samples. By means of the present invention a receiver for use in a Multiple Input Multiple Output (MIMO) communication system may comprise fewer antennas than the number of sub-streams, thereby enabling smaller terminals.

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