Statistically Robust Beamforming Optimization for Multi-Antenna Full-Duplex DF Relaying

This paper studies robust beamforming optimization for full-duplex (FD) multi-antenna decode-and-forward (DF) relaying subject to stochastic channel state information (CSI) errors. By exploiting the statistics of CSI errors, we jointly optimize the receive and transmit beamformers of the FD relay to...

Full description

Saved in:
Bibliographic Details
Published in:IEEE access 2019, Vol.7, p.175564-175575
Main Authors: Shen, Hong, Xu, Wei, Gong, Shulei, He, Zhenyao, Zhao, Chunming
Format: Article
Language:English
Subjects:
Antennas
Array signal processing
Beamforming
Channel state information (CSI) errors
Covariance matrices
Exact solutions
full-duplex (FD) communications
MIMO communication
multi-antenna decode-and-forward (DF) relay
Optimization
Polynomials
Relay
Relaying
Relays
robust beamforming optimization
Robustness
Stochastic processes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper studies robust beamforming optimization for full-duplex (FD) multi-antenna decode-and-forward (DF) relaying subject to stochastic channel state information (CSI) errors. By exploiting the statistics of CSI errors, we jointly optimize the receive and transmit beamformers of the FD relay to maximize the system achievable rate. Firstly, we prove that the original optimization problem can be equivalently transformed into a solvable convex feasibility check problem with second-order cone (SOC) constraints, whose globally optimal solution can be obtained in polynomial time. In order to reduce the computational complexity of the optimal beamforming, we further advocate a semi-closed form solution which achieves near-optimal performance. Afterwards, concerning a special case with spatially uncorrelated CSI errors, we develop a closed-form relay beamforming solution which reveals the optimality of the maximum ratio combining/maximum ratio transmission (MRC/MRT) strategy. Simulations are conducted to validate the effectiveness of the proposed robust FD relay beamforming designs.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2957885