Fig. 7From: Channel estimation for FDD massive MIMO system by exploiting the sparse structures in angular domainNMSE performance for different numbers of antennas at users, i.e., M, where N=64. The length of pilot sequence is T=16. Transmit SNR of BS is \(\frac {NP}{\sigma ^{2}} = 15\) dB. The angular spread is Δd=5°Back to article page