Paper Info
Title
Subspace precoding with limited feedback for the massive MIMO interference channel
Abstract
A non-iterative two-stage precoding scheme for the multiple-input-multiple-output interference channel (IC) with a large number of transmit antennas is presented. Second stage precoders are used to compress the channel state information (CSI) of interfering links, while keeping the multiplexing gain of the IC constant. First stage precoders zero-force the interference based on the compressed CSI of interfering links. In addition, a proper design of the second stage precoders forces the first stage precoders to span a reduced subspace containing the maximal direct links' power, resulting in a better zero-forcing solution in terms of sum-rate. For a fixed number of receive antennas and transmitter/receiver pairs, the required feedback amount of interfering links is constant, regardless of the number of transmit antennas. As cooperative algorithms are very sensitive to CSI errors, the proposed scheme offers an attractive solution in case CSI feedback constitutes the system bottleneck.
Year
DOI
Venue
2014
10.1109/SAM.2014.6882395
Sensor Array and Multichannel Signal Processing Workshop
Keywords
Field
DocType
MIMO communication,antenna arrays,precoding,radiofrequency interference,receiving antennas,transmitting antennas,wireless channels,CSI compression,CSI errors,CSI feedback,IC constant,channel state information compression,cooperative algorithm,first-stage precoder,first-stage precoders,interference zero-forcing,interfering links,limited feedback,massive MIMO IC,massive MIMO interference channel,maximal direct link power,multiple-input-multiple-output interference channel,multiplexing gain,noniterative two-stage precoding scheme,receive antennas,reduced subspace,second-stage precoders,subspace precoding,system bottleneck,transmit antenna number,transmitter-receiver pairs,zero-forcing solution
Topology,Spatial correlation,Multi-user MIMO,Telecommunications,Computer science,Computer network,MIMO,Interference (wave propagation),Zero-forcing precoding,Spatial multiplexing,Precoding,Channel state information
Conference
ISSN
Citations 
PageRank 
1551-2282
0
0.34
References 
Authors
7
3
Name
Order
Citations
PageRank
Samer Bazzi100.34
Guido Dietl212715.21
Wolfgang Utschick31755176.66