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A New Design of Polar-Cap Differential Codebook for Temporally/Spatially Correlated MISO Channels | IEEE Journals & Magazine | IEEE Xplore
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A New Design of Polar-Cap Differential Codebook for Temporally/Spatially Correlated MISO Channels


Abstract:

Accurate channel direction information is essential to achieve considerable capacity gains in multiple-input multiple-output (MIMO) wireless communication systems. Limite...Show More

Abstract:

Accurate channel direction information is essential to achieve considerable capacity gains in multiple-input multiple-output (MIMO) wireless communication systems. Limited feedback using a polar-cap differential codebook which utilizes the temporal correlation in multiple-input single-output (MISO) channels is presented in this paper. We first describe the general properties of the polar-cap differential codebook and then explain the design methodology of the size of the polar-cap given the temporal correlation coefficient. We also propose an enhancement of the polar-cap differential codebook which is suitable for a spatially correlated channel. We compare the polar-cap differential codebook with a rotation-based differential codebook in terms of the chordal distance to demonstrate the superiority of the polar-cap differential codebook. Monte Carlo simulation results show that the polar-cap differential codebook facilitates a significant performance gain in both temporally and spatially correlated channels.
Published in: IEEE Transactions on Wireless Communications ( Volume: 11, Issue: 2, February 2012)
Page(s): 703 - 711
Date of Publication: 28 December 2011

ISSN Information:


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