Proceedings ArticleDOI
Relay-Assisted MIMO Multiuser Precoding in Fixed Relay Networks
Jiang Yu,Danpu Liu,Changchuan Yin,Guangxin Yue +3 more
- pp 881-884
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TLDR
This paper proposes two relay-assisted MIMO multiuser precoding models and proposes system architectures that give the means on how to utilize fixed relay in MIMo multiusers system.Abstract:
In this paper, downlink multiple input multiple output (MIMO) multiuser transmission using precoding in fixed relay networks is studied. We propose two relay-assisted MIMO multiuser precoding models. For the first model, multiuser precoding is performed at base station (BS). The fixed relay processes the received signal and forwards it, which is amplify- and-forward. While for the second model, the multiuser precoding is done at relay. Thus, detect-and-forward or decode- and-forward transmission can be used. Based on these models, some multiuser precoding algorithms are investigated. Our simulation results show that fixed relay offers significant gain. And our system architectures give the means on how to utilize fixed relay in MIMO multiuser system.read more
Citations
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Journal ArticleDOI
Joint Transceiver Optimization for Multiuser MIMO Relay Communication Systems
TL;DR: This paper develops two iterative methods to solve the highly nonconvex joint source, relay, and receiver optimization problem and shows that for given source precoding matrices, the optimal relay amplifying matrix diagonalizes the source-relay-destination channel.
Proceedings ArticleDOI
Joint source and relay optimization for multiuser MIMO relay communication systems
TL;DR: This paper designs the source precoding matrices and the relay amplifying matrix of an amplify-and-forward multiuser multiple-input multiple-output (MIMO) relay communication system and proposes an alternating technique to efficiently solve the nonconvex source and relay optimization problem.
Journal ArticleDOI
Achieving Joint Diversity in Decode-and-Forward MIMO Relay Networks with Zero-Forcing Equalizers
Giwan Choi,Wei Zhang,Xiaoli Ma +2 more
TL;DR: This paper proposes high-rate and low-complexity decode-and-forward MIMO relay designs that achieve cooperative diversity, receive diversity or joint diversity, and introduces a power-scaling strategy for MIMo relays to enable cooperative diversity.
Proceedings ArticleDOI
Joint Signal Space Alignment and Precoding in Two-Way Relay Multi-user Networks
TL;DR: A new multi-user two-way transmission network is considered to fully utilize wireless system resource, and ensure transmission reliability, with assistant of an amplify-and-forward relay.
Journal ArticleDOI
Interference management strategy for multiuser two-way relay networks
TL;DR: This work investigates the interference management strategy for multiuser two-way transmission network where multiple pairs of users communicate with their pre-assigned partners, with assistance of an amplify-and-forward relay, and takes advantage of the signal space alignment technique to cancel the multi-user interference.
References
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Relay-based deployment concepts for wireless and mobile broadband radio
R. Pabst,Bernhard Walke,D.C. Schultz,P. Herhold,Halim Yanikomeroglu,Sayandev Mukherjee,Harish Viswanathan,Matthias Lott,Wolfgang Zirwas,Mischa Dohler,H. Aghvami,David Falconer,Gerhard Fettweis +12 more
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A vector-perturbation technique for near-capacity multiantenna multiuser communication-part I: channel inversion and regularization
TL;DR: A simple encoding algorithm is introduced that achieves near-capacity at sum rates of tens of bits/channel use and regularization is introduced to improve the condition of the inverse and maximize the signal-to-interference-plus-noise ratio at the receivers.
Journal ArticleDOI
A vector-perturbation technique for near-capacity multiantenna multiuser communication-part II: perturbation
TL;DR: A simple encoding algorithm is introduced that achieves near-capacity at sum-rates of tens of bits/channel use and a certain perturbation of the data using a "sphere encoder" can be chosen to further reduce the energy of the transmitted signal.
Journal ArticleDOI
On the capacity of MIMO relay channels
TL;DR: It is somewhat surprising that the upper bound can meet the lower bound under certain regularity conditions (not necessarily degradedness), and therefore the capacity can be characterized exactly; previously this has been proven only for the degraded Gaussian relay channel.
Journal ArticleDOI
Dirty-paper coding versus TDMA for MIMO Broadcast channels
Nihar Jindal,Andrea Goldsmith +1 more
TL;DR: The tightness of this bound in a time-varying channel where the channel experiences uncorrelated Rayleigh fading and in some situations the dirty paper gain is upper-bounded by the ratio of transmit-to-receive antennas is found.
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