On Combined Beamforming and OSTBC Over the Cognitive Radio S-Channel With Partial CSI

Provided by: ICST
Topic: Mobility
Format: PDF
A pair of secondary (cognitive, unlicensed) users is communicating in the presence of multiple primary (licensed) user pairs. The cognitive transceiver is implementing beamforming and orthogonal space-time block coding in the presence of external interference, induced by the primary system transmission, that has to be properly handled. Moreover, the cognitive link nodes, both the transmitter and the receiver, are supplied with different levels of Network Side Information (NSI), i.e., primary messages and partial Channel Side Information (CSI).

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