Error performance of joint transmit and receive antenna selection in two hop amplify-and-forward relay system over Nakagami-m fading channels

Two-Tier Channel Estimation Aided Near-Capacity MIMO Transceivers Relying on Norm-Based Joint Transmit and Receive Antenna Selection

“…As a hybrid version of TxAS and RxAS, JTRAS schemes were investigated in [12]- [15], where it was observed that MIMO systems employing JTRAS were capable of improving 1536-1276 © 2014 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.…”

“…Diverse sub-optimal CBAS techniques were developed in [12], [13], which were capable of reducing the AS complexity at the cost of a certain performance loss. As another efficient yet low-complexity category of AS algorithms, NBAS techniques are studied in [14], [15], which aim for selecting specific antennas that are capable of maximizing the system's SNR. It was shown that NBAS algorithms were capable of approaching the performance of CBAS techniques, while imposing a lower AS complexity.…”

“…A major limitation of this nearoptimal AS method is that it is restricted to select a single RA. A JTRAS algorithm was proposed for two-hop amplify-andforward relaying systems in [15], where only a single TA/RA pair is selected in each phase of relay communication.…”

“…It has been widely recognized [8]- [15] that AS techniques are capable of significantly improving the performance of coherently detected MIMO systems based on the assumption of perfectly known channel state information (CSI), in comparison to the conventional MIMO systems equipped with the same number of RF chains. However, in practice, CSI has to be acquired.…”

“…The complexity of the tier-one TBCE is kept low by using only a small number of training blocks, i.e., using a small M T , albeit this results in a reduced-accuracy full channel matrix estimate (15). Fortunately, this does not really matter, as AS is insensitive to CE errors.…”