Robust Iterative Transceiver Beamforming for Multipair Two-Way Distributed Relay Networks

Ma, Jingxiao; Liu, Wei

doi:10.1109/access.2017.2768436

Cited by 2 publications

(3 citation statements)

References 45 publications

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“…As the threshold SN R L is set higher, the performance gets better; however, when a large number of relays are included in the network (M = 100), the SINR difference at SN R L = −10 dB and SN R L = 10 dB is only 2 dB, which indicates that increasing the number of relays can dramatically reduce the interference introduced to the PU receiver, when total relay output power is not restricted. The reason is that, as indicated in [10], in such iterative transceiver algorithms, when the number of relays increases, the total relay output power required to achieve the same SINR can be greatly reduced and so is the total interference introduced to the PU receiver. Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Furthermore, multiple single-antenna idle devices within the same region of PUs are utilized as distributed relay nodes and assist the SU transmissions with simple amplify and forward protocol. By using this arrangement, proper iterative transceiver beamforming design, which has demonstrated to be strongly capable to increase the SINR of each user pair in a relay beamforming network [10], could be utilized on the SUs and relay nodes to adaptively increase quality of service (QoS) of the secondary network while keeping the leakage interference at PU receiver under a predefined level. In our considered two-stage communication network, we assume that the PUs are having one-way communication and accordingly only the PU receiver are interfered by the communication of SUs.…”

Section: Introductionmentioning

confidence: 99%

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Iterative Transceiver Beamforming of Distributed Relay Networks in Cognitive Radio Networks

Liu

Zhang

2019

2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

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This paper investigated the transceiver beamforming problem of multi-pair distributed relay network in a cognitive radio (CR) framework. The goal is to support reliable multi-pair transmissions between secondary users (SU) with assistance of a number of relays, while keeping the total leakage interference on the primary user (PU) under a predefined threshold level. Certain iterative algorithm is proposed to decompose the very difficult original problem into three solvable sub-problems, and after certain number of iteration steps, the obtained transceiver beamformers and relay beamformers can form a group of globally sub-optimal solutions that leads to significant performance enhancement of the secondary network while restricting the leakage interference on PU receiver. Two transmission schemes are considered where the first one only constrain the leakage signal power introduced to PU received, and the second one adds a constraint of the total relay output power. At last, we analyzed the condition, under which the later transmission scheme could be simplified with less computational complexity to solve it.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Iterative Transceiver Beamforming of Distributed Relay Networks in Cognitive Radio Networks

Liu

Zhang

2019

2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

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“…Prior work on distributed beamforming [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14] includes several approaches to enhancing the reception of signals originating from relays. In [2], relay network problems are described as optimization problems and relevant aspects and implications are provided and discussed, which gives a general overview and methodologies that are commonly considered to analyze relay networks.…”

Section: A Prior and Related Workmentioning

confidence: 99%

Distributed Robust Beamforming Based on Low-Rank and Cross-Correlation Techniques: Design and Analysis

Ruan

Lamare

2019

IEEE Trans. Signal Process.

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In this work, we present a novel robust distributed beamforming (RDB) approach based on low-rank and crosscorrelation techniques. The proposed RDB approach mitigates the effects of channel errors in wireless networks equipped with relays based on the exploitation of the cross-correlation between the received data from the relays at the destination and the system output and low-rank techniques. The relay nodes are equipped with an amplify-and-forward (AF) protocol and the channel errors are modeled using an additive matrix perturbation, which results in degradation of the system performance. The proposed method, denoted low-rank and cross-correlation RDB (LRCC-RDB), considers a total relay transmit power constraint in the system and the goal of maximizing the output signal-tointerference-plus-noise ratio (SINR). We carry out a performance analysis of the proposed LRCC-RDB technique along with a computational complexity study. The proposed LRCC-RDB does not require any costly online optimization procedure and simulations show an excellent performance as compared to previously reported algorithms.

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Robust Iterative Transceiver Beamforming for Multipair Two-Way Distributed Relay Networks

Cited by 2 publications

References 45 publications

Iterative Transceiver Beamforming of Distributed Relay Networks in Cognitive Radio Networks

Iterative Transceiver Beamforming of Distributed Relay Networks in Cognitive Radio Networks

Distributed Robust Beamforming Based on Low-Rank and Cross-Correlation Techniques: Design and Analysis

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