Receive Diversity Selection and Switched Diversity

Receive Diversity Selection and Switched Diversity space time time diversity diversity coding switched diversity selection diversity multiple antennas codes interleaves.

Posted in WIMAX
at 2014.07.22

Make use of a number of receive antennas that are well separated (coherence distance) to generate independent receptions of the transmitted signal. Selection diversity: choose received signal with largest received power, S/N, etc. Switched diversity: choose alternate antenna if signal falls below a certain threshold.

Linear combining: linearly combine a weighted replica of all received signals. There is a worthwhile improvement even with two branch selection diversity. Performance improves with the number of diversity branches but the complexity increases sharply.

Selection and Switched Diversity: These are pretty straightforward systems

Receive Diversity Wimax

Space Time Coding – STC Space-Time Diversity Coding.Codes, interleaves and distributes the same symbol over

multiple antennas . Spatial Multiplexing Codes, interleaves and distributes different symbols over multiple antennas. For both, antennas transmit on co-channels

Space-Time Diversity Coding

Using Space-Time Diversity Coding in a multi-path environment increases Rx signal strength, increasing distance.

Space-Time Diversity Coding

Distributing the same data over co-channels on spatially displaced antennas, provides a temporally displaced set of sub-streams to be seen by the receiver.

Article Topics :

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