Circulant wired mimo structures

Mirtaheri, S. Amir; Vaughan, Rodney G.

doi:10.1109/ccece.2005.1556890

Cited by 1 publication

(3 citation statements)

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“…For large SNRs, it is vice versa. This behaviour is founded on the pdfs of the eigenvalues of the Hermitian matrix of G [4].…”

Section: Comparison Of the Shannon And The Practicable Capacitiesmentioning

confidence: 99%

“…Systematic structures include the circulant which has created recent interest [4] [5]. Recent examples of systematic structures are [4] [5] [6] [7] [8]. The emphasis of this paper is on capacity behaviour, and while this includes that of the circulant, it is the comparison itself that leads to a better understanding of MIMO capacity and possible new implementation strategies.…”

Section: Introductionmentioning

confidence: 99%

“…Systematic correlated structures are different to the correlation structure introduced by the antennas and propagation in a wireless MIMO system. Systematic structures include the circulant which has created recent interest [4] [5]. Recent examples of systematic structures are [4] [5] [6] [7] [8].…”

Section: Introductionmentioning

confidence: 99%

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Practicable MIMO Capacity in Ideal Channels

Mirtaheri

Vaughan

2006 IEEE 63rd Vehicular Technology Conference

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Abstract-The impact of communications signal processing such as QAM modulations (instead of gaussian signals), finite block lengths (instead of infinitely long codes), and using simpler algorithms (instead of expensive-to-implement ones), etc., is a lower practicable capacity efficiency than that of the Shannon limit. In this paper, the theoretical and practicable capacity efficiencies for known-channel MIMO are compared for two idealized channels. The motivation is to identify worthwhile trade-offs between capacity reduction and complexity reduction. The channels are the usual complex gaussian random i.i.d., and also the complex gaussian circulant. The comparison reveals new and interesting capacity behaviour, with the circulant channel having a higher capacity efficiency than that of the random i.i.d. channel, for practical SNR values. A circulant channel would also suggest implementation advantages owing to its fixed eigenvectors. Because of the implementation complexity of water filling, the simpler but sub-optimum solution of equal power allocation is investigated and shown to be worthwhile.

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“…For large SNRs, it is vice versa. This behaviour is founded on the pdfs of the eigenvalues of the Hermitian matrix of G [4].…”

Section: Comparison Of the Shannon And The Practicable Capacitiesmentioning

confidence: 99%