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Multiuser diversity can significantly improve wireless system performance by exploiting the feedback information that conveys the channel quality. In multiple input-multiple output and orthogonal frequency division multiplexing (MIMO-OFDM) systems, the per subcarrier on per antenna feedback induces a substantial amount of feedback overload and requires high computational complexity. This paper addresses...
A soft digital signal processing (DSP) design paradigm has been recently proposed to reduce the energy consumption of DSP systems through voltage overscaling. This paper shows that the selection of arithmetic unit structure can be an important and non-trivial issue in soft DSP system design. We present an optimal formulation and propose sub-optimal low-complexity approximations for selecting the appropriate...
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