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ICASSP
2009
IEEE

Differential feedback of MIMO channel correlation matrices based on geodesic curves

9 years 7 months ago
Differential feedback of MIMO channel correlation matrices based on geodesic curves
This paper proposes a differential quantization strategy to be used in the feedback link of a multi-input-multi-output (MIMO) communication system. This algorithm is applied to the channel correlation matrix exploiting geodesic curves and the intrinsic geometry of positive definite Hermitian matrices. Simulation results in the paper show that the proposed algorithm improves other techniques based on the direct quantization of the channel response matrix or the quantization of the subspace spanned by the strongest eigenmodes of the MIMO channel, i.e., Grassmannian based techniques. The main drawback of Grassmananian based algorithms is that the transmitter is constrained to apply a uniform power allocation among eigenmodes, which is not forced in the algorithm proposed in this paper.
Daniel Sacristán-Murga, Antonio Pascual-Ise
Added 18 Feb 2011
Updated 18 Feb 2011
Type Journal
Year 2009
Where ICASSP
Authors Daniel Sacristán-Murga, Antonio Pascual-Iserte
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