Dynamic Transmission Policy for Multi-Pair Cooperative Device-to-Device Communication With Block-Diagonalization Precoding

Wang, Yung-Shun; Hong, Y.-W. Peter; Chen, Wen-Tsuen

doi:10.1109/twc.2019.2908869

Cited by 9 publications

(2 citation statements)

References 59 publications

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“…Interference management is critical when existing D2D users underlay among the cellular users as the D2D users utilize the spectrum currently in use by the cellular users for data transmission. To handle the problem of interference in D2D networks, cooperative precoding strategies exploiting spatial diversity by weighting the information streams from different D2D users have recently been justified as enabling approaches to significantly improve the performance in practical applications [30][31][32]. Specifically, we study the effects of two sets of precoding schemes, both capable of controlling the interference resulting from the current active D2D users and cellular users.…”

Section: Research Objectivementioning

confidence: 99%

Mode Selection and Spectrum Allocation in Coexisting D2D and Cellular Networks with Cooperative Precoding

Chan

Chien

Yang

2019

Sensors

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In this paper, we investigate the mode selection strategies for a new device-to-device (D2D) pair becoming active in a network with a number of existing D2D sensors or users coexisting with cellular users in a D2D-enabled heterogeneous network. Specifically, we propose two selection rules, the signal-to-interference-plus-noise-ratio (SINR)-based and the capacity-based, combined with two sets of different precoding schemes and discuss their impacts on the system under a variety of scenarios. While the cooperative block diagonalization (BD) among the cellular users combined with the zero-forcing (ZF) precoding among D2D users can eliminate interference observed at the new D2D receiving sensor, the maximum signal-to-leakage-and-noise-ratio (SLNR) precoding is often a preferred option due to low-complexity implementations and comparable performance. We note that the two selection rules, the SINR-based and the capacity-based, considered in this paper impact on the system differently, with interesting tradeoff from different perspectives. Finally, we provide insights by simulations into the best selection among the three modes depending on a variety of use cases in the network.

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Section: Research Objectivementioning

confidence: 99%

Mode Selection and Spectrum Allocation in Coexisting D2D and Cellular Networks with Cooperative Precoding

Chan

Chien

Yang

2019

Sensors

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“…In MIMO systems, precoding is an efficient method to achieve multiuser diversity and multiplexing [ 3 , 4 ]. The conventional precoding schemes contain zero-forcing (ZF) [ 5 , 6 ], regularized channel inversion (RCI) [ 7 , 8 ], block diagonalization (BD) [ 9 , 10 ], etc. For most of the precoding schemes, perfect channel state information (CSI) and complex matrix computation are required, leading to high complexity.…”

Section: Introductionmentioning

confidence: 99%

Joint Resource Allocation for Multiuser Opportunistic Beamforming Systems with OFDM-NOMA

Sun

Tao

Yang

et al. 2021

Entropy

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Opportunistic beamforming (OBF) is an effective technique to improve the spectrum efficiencies (SEs) of multiple-input-multiple-output (MIMO) systems, which can obtain multiuser diversity gains with both low computation complexity and feedback information. To serve multiple users simultaneously, many multiple-access schemes have been researched in OBF. However, for most of the multiple-access schemes, the SEs are not satisfactory. To further improve the SE, this paper proposes a downlink multiuser OBF system, where both orthogonal frequency division multiplexing (OFDM) and non-orthogonal multiple-access (NOMA) methods are applied. The closed-form expressions of the equivalent channels and SE are derived in frequency selective fading channels. Then, an optimization problem is formulated to maximize the SE, although the optimization problem is non-convex and hard to solve. To obtain the solution, we divide the optimization problem into two suboptimal issues, and then a joint iterative algorithm is applied. In the proposed optimization scheme, the subcarrier mapping ϑ, user pairing knc and allocated power Pknc are determined to maximize spectrum efficiency (SE) and reduce bit error ratio (BER). According to numerical results, the proposed method achieves approximately 5 dB gain on both SE and BER, compared to the existing beamforming methods with low feedback information. Moreover, the SE of the proposed method is approximately 2 (bps/Hz) higher than sparse code multiple-access (SCMA), when the number of waiting users and the ratio of transmit power to noise variance are respectively 10 and 20 dB. It is indicated that the proposed scheme can achieve high and low BER with the limited feedback and computation complexity, regardless of the transmit power and the number of waiting users.

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Relay selection in network coding assisted multi-pair D2D communications

Wang

et al. 2020

Ad Hoc Networks

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Dynamic Transmission Policy for Multi-Pair Cooperative Device-to-Device Communication With Block-Diagonalization Precoding

Cited by 9 publications

References 59 publications

Mode Selection and Spectrum Allocation in Coexisting D2D and Cellular Networks with Cooperative Precoding

Mode Selection and Spectrum Allocation in Coexisting D2D and Cellular Networks with Cooperative Precoding

Joint Resource Allocation for Multiuser Opportunistic Beamforming Systems with OFDM-NOMA

Relay selection in network coding assisted multi-pair D2D communications

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