Interpolation Based Unitary Precoding for Spatial Multiplexing MIMO-OFDM With Limited Feedback
IEEE Transactions on Signal Processing
Linear transmit processing in MIMO communications systems
IEEE Transactions on Signal Processing - Part I
MIMO Relaying With Linear Processing for Multiuser Transmission in Fixed Relay Networks
IEEE Transactions on Signal Processing
Limited-Feedback Precoding for Closed-Loop Multiuser MIMO OFDM Systems with Frequency Offsets
IEEE Transactions on Wireless Communications - Part 1
IEEE Transactions on Wireless Communications - Part 2
Capacity limits of MIMO channels
IEEE Journal on Selected Areas in Communications
Covariance-based linear precoding
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
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We deal with linear precoding in two-hop multipleinput single-output (MISO) amplify-and-forword (AF) cooperative networks. It is assumed that only limited feedback about channel state information (CSI) is available at the source node where precoding is performed. To reduce the feedback overhead, the precoder is designed based on covariance CSI of the direct channel and relay channel with the constraint of total transmit power at source and relay nodes. The signal model for the described system is derived and the uncoded bit error rate (BER) of cooperative communication is investigated. With the numerical results obtained we can conclude that the precoders designed based on the partial CSI can still help to achieve diversity gain, which could be a reference for systems where full CSI is not so easy to obtain at the source node.