Performance Analysis of Signal Detection using Quantized Received Signals of Linear Vector Channel

Details Performance Analysis of Signal Detection using Quantized Received Signals of Linear Vector Channel Performance Analysis of Signal Detection using Quantized Received Signals of Linear Vector Channel

2008-05-22

arxiv.org/abs/0805.3406v1

Computer Science

Information Theory

Scientific paper

Performance analysis of optimal signal detection using quantized received signals of a linear vector channel, which is an extension of code-division multiple-access (CDMA) or multiple-input multiple-output (MIMO) channels, in the large system limit, is presented in this paper. Here the dimensions of channel input and output are both sent to infinity while their ratio remains fixed. An optimal detector is one that uses a true channel model, true distribution of input signals, and perfect knowledge about quantization. Applying replica method developed in statistical mechanics, we show that, in the case of a noiseless channel, the optimal detector has perfect detection ability under certain conditions, and that for a noisy channel its detection ability decreases monotonically as the quantization step size increases.

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