In this paper, we focus in investigating the optimal MIMO transmission strategy and the optimal feedback strategy for forward channel capacity and forward error exponent of the MIMO block fading channels when the feedback link is causal and has a capacity constraint. In this paper, we assume a forward MIMO block fading channel where the channel state information is estimated at the receiver and...

Closed loop adaptive modulation systems rely on a feedback channel to receive channel state information from the users and set according to it the appropriate modulation index. In [1] three joint adaptive modulation and combining scheduling schemes are suggested to manage the wireless resource between many users in a multiuser diversity environment. The assumption that was made in that work is ...

A multiple access channel (MAC) with generalized feedback (GF) is a communication network where two or more sources transmit information to a single destination, and each source observes a different feedback from the channel output. Such a channel with two users is shown in Fig. 1, where W1,W2 are the messages to be transmitted to the receiver, X1, X2 are signals transmitted by the encoders, Y ...