Robust MMSE design for full-duplex decode-and-forward SC-FDE relay systems

In this paper, we consider the robust transceiver design for a two-hop full-duplex decode-and-forward relay system employing single-carrier transmission with frequency-domain equalization (SC-FDE). The design problem for the transmit precoding and receive equalization is formulated as an optimizatio...

Full description

Saved in:
Bibliographic Details
Published in:2015 IEEE International Conference on Communications (ICC) pp. 1920 - 1925
Main Authors: Peiran Wu, Schober, Robert, Bhargava, Vijay K.
Format: Conference Proceeding
Language:English
Published: IEEE 01.06.2015
Subjects:
Channel estimation
Interference
Linear programming
Optimization
Relays
Resource management
Robustness
ISSN:1550-3607
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we consider the robust transceiver design for a two-hop full-duplex decode-and-forward relay system employing single-carrier transmission with frequency-domain equalization (SC-FDE). The design problem for the transmit precoding and receive equalization is formulated as an optimization problem with the objective to minimize the sum mean-squared error (MSE) of the two hops subject to separate node transmit power constraints. We show that the equalization filters can be optimized individually at the receiving nodes and take the form of robust Wiener filters. However, due to the loopback interference, the transmissions in the two hops are coupled and the transmit precoding problem boils down to a non-convex power allocation problem in the frequency domain. An alternating optimization approach is proposed to obtain the power allocation where convex programming problems and difference of convex programming problems are solved in an alternating manner. Numerical results are provided to validate the MSE and the achievable rate of the proposed robust schemes, showing that significant performance gains can be achieved compared to conventional half-duplex systems and non-robust full-duplex designs.
ISSN:1550-3607
DOI:10.1109/ICC.2015.7248606