Multicasting MIMO relay optimization based on min-max MSE criterion

Abstract

In this paper, we consider a multicasting multiple input multiple-output (MIMO) relay system where the transmit ter multi casts a common message to multiple receivers with the aid of a relay node, all equipped with multiple antennas. Given the power constraints at the source and the relay nodes, we aim at minimizing the maximal mean-squared error (MSE) of the signal waveform estimation among the destination nodes through joint source, relay, and receiver matrices optimization. We provide a low complexity solution to this highly nonconvex optimization problem. In particular, we show that under the (moderately) high signal-to-noise ratio (SNR) assumption, the joint source and relay optimization problem can be solved using standard semidefinite programming (SDP) technique. Numerical simulations provided demonstrate the effectiveness of the proposed algorithm.

Transceiver Optimization for Multi-Hop MIMO Relay Multicasting From Multiple Sources

“…To the best of our knowledge, such multicasting (from multiple sources) MIMO relay system has not been investigated in existing works. Note that our paper generalizes the multicasting scheme in [21], [22] in two ways. Firstly, we consider multicasting from multiple sources instead of the single-transmitter multicasting in [21], [22].…”

“…Note that our paper generalizes the multicasting scheme in [21], [22] in two ways. Firstly, we consider multicasting from multiple sources instead of the single-transmitter multicasting in [21], [22]. Secondly, we generalize the two-hop MIMO relay multicasting scheme to multi-hop systems with any number of hops.…”

“…An iterative algorithm has been developed in [22] to jointly optimize the source, relay, and receiver matrices. In order to reduce the computational complexity of the iterative algorithm, a simplified algorithm has also been proposed in [21], [22] for the two-hop multicasting system. Multicasting from multiple sources in a dual-hop MIMO relay system has been considered in [23].…”

“…Thus, the scheme in [20] leads to a higher multicasting rate than single-session transmissions. Joint transmit and relay precoding design problems were investigated in [21], [22] for a two-hop multicasting MIMO relay system where all nodes are equipped with multiple antennas. An iterative algorithm has been developed in [22] to jointly optimize the source, relay, and receiver matrices.…”

Joint relay selection and power control for robust cooperative multicast in MmWave WPANs

“…As cores of cooperative relaying, rational relay selection and power allocation are consequently the keys of improving system performance. While radio resource management of such a system remains an open problem, various attempts have been focused on relay selection and power allocation [7][8][9][10][11][12][13]. Most studies on this field merely focus on solving part of these issues.…”