Cooperative relay beamforming design for multi-cluster relay interference networks
MetadataShow full item record
In this work, we consider a multi-cluster amplified-and-forward (AF) relay interference network and design relay beam matrix for each cluster to maximize the minimum signal-to-interference-and-noise ratio (SINR) at destinations subject to the relay power budget within each cluster. Both single and multiple source-destination (S-D) pair scenarios are considered. We propose a beam matrix structured as a weighted sum of two types of beam matrices: zero forcing (ZF) beam matrix for inter-cluster interference suppression, and another beam matrix for beamforming gain maximization within a cluster. Maximum ratio combing (MRC) and minimal mean square error (MMSE) are chosen to design the second beam matrix in single and multiple S-D pair scenarios, respectively. The optimal solution for each type of beam matrix is obtained in closed form. We then obtain the optimal weights to each type of beam matrix by transforming the max-min SINR problem and solving it via the SDR approach. Compared with applying the direct SDR approach to the original problem, our solution offers similar performance with significantly lower computational complexity. In addition, our proposed structured beam matrix clearly reveals the power shift between interference suppression among clusters and beamforming gain maximization within the cluster as the distance among clusters or the size of clusters changes.
Showing items related by title, author, creator and subject.
Li, Wen (2016-08-01)In this thesis, we focus on joint relay beamforming and transceiver processing in multiuser relay network. First of all, we consider the scenario in which multiple source-to-destination (S-D) pairs intend to communicate ...
Jointly optimal pre- and post-channel equalization and distributed beamforming in asynchronous bi-directional relay networks Eshaghian, Farzaneh (2015-09-01)We consider an asynchronous two-way relay network, consisting of two transceivers and multiple relays, where due to the propagation delays of different transceiver-relay paths being different, inter-symbol- interference ...
Zeng, Lingqian (2015-04-01)In this thesis, we consider two-way relaying in a wireless communication system with two transceivers and one relay node. In such a model, two scenarios are taken into account: a system with one energy harvesting (EH) relay ...