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Communication Dans Un Congrès ISWCS '12 : The Ninth International Symposium on Wireless Communication Systems Année : 2012

Subspace blind equalization for channels with low SNR

Résumé

In the plethora of second-order statistics (SOS) based blind channel equalization techniques, only two algorithms are able to perform equalization with a pre-specified delay. Delay selection is a compelling feature in order to reduce noise enhancement of Zero-Forcing (ZF) equalizers. We show that channel output shifted correlation matrices with different time lags can be combined to obtain a rank-deficient SOS-based matrix whose kernel is made of ZF equalizers of a pre-determined delay. Contrarily to existing algorithms, such a ZF equalizer is obtained at a low complexity: It involves a single Eigen Vector Decomposition (EVD) and does not require prior knowledge nor estimation of the noise power. Such a straightforward estimation translates, also, into better equalization performance at low channel SNR, as confirmed by simulations.
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Dates et versions

hal-00746467 , version 1 (16-12-2020)

Identifiants

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Houcem Gazzah, Jean-Pierre Delmas. Subspace blind equalization for channels with low SNR. ISWCS '12 : The Ninth International Symposium on Wireless Communication Systems, Aug 2012, Paris, France. pp.461-465, ⟨10.1109/ISWCS.2012.6328410⟩. ⟨hal-00746467⟩
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