Gaussian multiaccess channels with ISI: capacity region and multiuser water-filling
作者： R.S. Cheng , S. Verdu
DOI: 10.1109/18.256487
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摘要: The capacity region of a two-user Gaussian multiaccess channel with intersymbol interference (ISI) in which the inputs pass through respective linear systems and are superimposed before being corrupted by an additive noise process is discussed. A geometrical method for obtaining optimal input power spectral densities presented. This can be viewed as nontrivial generalization single-user water-filling argument. It shown that, traditional memoryless channel, frequency-division (FDMA) optimally selected frequency bands each user achieves total multiuser ISI. However, memory is, general, not pentagon unless transfer functions both users identical. >
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