Figure 2
From: Iterative receivers with channel estimation for multi-user MIMO-OFDM: complexity and performance
The BER at different E b / N 0 for N = 4 receive antennas and K = 4 users. Different number of pilot OFDM symbols are used, S p = 1,2 and 10, where the total number of symbols is S = 20. Also shown is the performance obtained when using the channel estimator in the loop of the iterative receiver, as well as single user performance with PCSI, and the case of orthogonal boosted pilots. The MAP MUD and joint MMSE estimator is used.