Analysis of Beam Sweep Channel Estimation in Massive MIMO Networks
Authors: Tianyang Bai, Robert W. Heath, Jr.
Proc. of the IEEE Global Signal and Information Processing Conf., Washington, DC, December 7-9, 2016, pp. 615-619
Millimeter wave (mmWave) is a promising carrier frequency to implement massive MIMO networks. Due to the limitation on the number of RF chains and the channel sparsity in clusters, mmWave massive MIMO networks may apply a beam sweep method to estimate the channel in the angular domain. We propose a stochastic geometry framework to study the performance of beam sweep in the uplink. Based on the framework, we compute an approximate upper bound for the success probability of beam sweep. Numerical results verify the analysis, and show a non-monotonic trend between the beam width used in the beam sweep and the success probability.