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A new metric for BER evaluation in APP decoders with space diversity

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2 Author(s)
Lopez-Salcedo, J.A. ; Dept. of Signal Theor. & Commun., Univ. Politecnica de Catalunya, Barcelona, Spain ; Lamarca, M.

We propose a new metric which summarizes in a single parameter most of the information required to infer the BER of a turbo code (TC) in a Rayleigh multiple-input multiple-output (MIMO) channel. This metric relies on the measurement of the mean and variance of the log-likelihood ratios (LLRs) at the TC output and it is shown to provide a one-to-one relationship with the BER. Thus, this metric can be used to monitor the quality-of-service (QoS) and detect the need of changing the transmission mode in a reconfigurable system with adaptive modulation and coding (AMC).

Published in:

Signal Processing Advances in Wireless Communications, 2004 IEEE 5th Workshop on

Date of Conference:

11-14 July 2004