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Massive multiple-input multiple-output (MIMO) systems are one of key technologies for next generation cellular providing high spectral efficiency. While the effect of most interference and noise vanishes as the number of antennas increases, performance of massive MIMO systems is limited by pilot contamination caused by correlated pilot. Pilot reuse, allowing users in distant cells to use the same...
Authentication on the physical layer is proposed to enhance the security of communication. Some authentication techniques assume high signal-to-noise ratio (SNR) to estimate and exploit the phase of the received signal for the hypothesis test. We study the performance of a generalized likelihood ratio test (GLRT) assuming that the phase of the received signal cannot be measured accurately. Thus the...
Mixed hybrid-low resolution MIMO architectures reduce both the number of ADCs and their resolution to reduce power consumption. In such a system, the received signal suffers from two compression stages. One is due to the analog processing stage and the reduced number of RF chains, while the other is a result of signal quantization by the ADC converters. The compression steps both complicate the estimation...
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