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The theoretical analysis of downlink massive MIMO usually assumes the ideal Gaussian channel matrix with asymptotic orthogonality of channel vectors. Meanwhile, recent experiments have shown that massive MIMO channels between a certain user and massive base station antennas appear the spatial common sparsity (SCS) in both the time domain and angle domain. This motivates us to investigate whether realistic...
In this paper, we propose an improved preamble structure based on distance detection using a pair of training sequences in frequency domain, whereby self-adaptive algorithm is introduced. Guard interval with cyclic prefix (CP) property is used to achieve better signalling transmission performance under frequency selective fading channel. Moreover, delay and differential operation is applied to eliminate...
In this paper, we present a new algorithm as to how to select the initial search point and search window range in the inter-frame prediction based on the correlation of time-domain and airspace. Through the new algorithm for the initial point search, we obtain the improvement of the accuracy of the initial point search, and then we will find the best matching image block faster in the coming whole...
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