Phase feedback and adjustment between wireless nodes greatly reduce the power efficiency of distributed beamforming.
In this paper, we propose a distributed transmit beamforming method without any phase feedback between nodes.
The resulting analysis shows that considerable performance gains can be achieved for a small amount of phase feedback information, such that the overall performance approximates the ideal case with full phase feedback information.
Figure 11 depicts the CDF of the backhaul throughput considering errors in CoMP phase feedback bits when τ r =0.6.
We studied the performance of a DBF algorithm in the presence of different amounts of channel phase feedback information.
During the test phase feedback was given after every trial, which indicated the result of the classifier.
In the fourth paper, "Distributed transmit beamforming without phase feedback," Wang et al. propose a distributed transmit beamforming scheme which eliminates the inefficient feedback procedure.
We provide outage capacity analysis for 3rd Generation Partnership Project (3GPP) compliant CoMP method that exploits quantized short-term phase feedback.
In their paper "Performance of distributed beamforming for dense relay deployments in the presence of limited feedback information", T. Halinen, A.A. Dowhuszko, and J. Hämäläinen investigate the performance of a DBF algorithm for different amounts of channel phase feedback information.
