A recently proposed cognitive radio model that exploits primary retransmissions is modified, such that the secondary pair uses multiple antennas. By doing so the co-existence penalty can be practically eliminated, while achieving the same useful secondary throughput as before. The method does not require any non-causal knowledge or full channel state information at any transmitter.
Published in:
Electronics Letters
(Volume:47
,
Issue:
6
)
Date of Publication: March 17 2011