Reference : On the Variations in Mutual Information of MIMO Communication Systems Due to Perturbe...
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
On the Variations in Mutual Information of MIMO Communication Systems Due to Perturbed Channel State Information at Transmitter
Shankar, Bhavani mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Hari, K. V. S. [Indian Institute of Science, Bangalore]
IEEE Transactions on Communications
Yes (verified by ORBilu)
[en] In this paper, we address the issue of perturbed information at the transmitter in a multiple-input multiple-output (MIMO) system. Two schemes, correlation matrix feedback and channel information feedback, are proposed to convey information necessary for achieving capacity to the transmitter. This information is perturbed due to various impairments. A perturbation analysis is carried out to study the variations in mutual information for each of the proposed schemes. For ergodic channels, this analysis is used to design a MIMO system with a limited rate feedback. Using a codebook-based approach, vector quantizers are designed to minimize the loss in ergodic capacity for each of the proposed schemes, and their performance is studied. A non-codebook method, parameter-based feedback, is also presented, and the underlying rate-performance tradeoff is highlighted
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