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Optimal Signaling for Single Transmit Antenna Selection with Erroneous Feedback

Författare:
Publiceringsår: 2006
Språk: Engelska
Dokumenttyp: Konferensbidrag

Sammanfattning

We consider a MIMO system where error-prone feedback from the receiver is used by the transmitter
to select a single optimum antenna to transmit data. Such error-prone feedback is common
in the bandwidth-limited real systems, and is in marked contrast with the idealizations assumed
in the selection literature. We show how the signaling assignment, which maps the antenna indices
to the codewords that are fed back to indicate the index of the best transmit antenna, affects
the performance of transmit antenna selection. The impact is intimately coupled with the receiver
design. We derive approximate closed-form expressions for the average symbol error probability
of QPSK modulated data in a spatially correlated channel, and then systematically find the optimal
signaling assignment. Performance improvements are demonstrated for different antenna
topologies without introducing any additional redundancy.

Disputation

Nyckelord

  • Technology and Engineering

Övrigt

IEEE Globecom 2006
Inpress
Yes

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