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Due to the asymptotically orthogonal channel, minimum mean square error detection algorithm is near-optimal for uplink massive MIMO systems, but it involves matrix inversion with high complexity. This paper proposes a high-parallelism detection algorithm in an iterative way to avoid the complicated matrix inversion. The parallelism level is analyzed and convergence is proved in detail. The proposed...
This paper selects a reasonable threshold for energy detection in cognitive radio, where a non-line-of-sight (NLOS) environment is considered. The secondary user (SU) uses this threshold to detect whether the spectrum is occupied by the primary user (PU) or not. Three specific NLOS scenarios are depicted and analyzed in this paper. In order to improve the existing threshold value in energy detection...
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