Journal ArticleDOI
An overview of limited feedback in wireless communication systems
David J. Love,Robert W. Heath,Vincent K. N. Lau,David Gesbert,Bhaskar D. Rao,Matthew Andrews +5 more
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TLDR
This tutorial provides a broad look at the field of limited feedback wireless communications, and reviews work in systems using various combinations of single antenna, multiple antenna, narrowband, broadband, single-user, and multiuser technology.Abstract:
It is now well known that employing channel adaptive signaling in wireless communication systems can yield large improvements in almost any performance metric. Unfortunately, many kinds of channel adaptive techniques have been deemed impractical in the past because of the problem of obtaining channel knowledge at the transmitter. The transmitter in many systems (such as those using frequency division duplexing) can not leverage techniques such as training to obtain channel state information. Over the last few years, research has repeatedly shown that allowing the receiver to send a small number of information bits about the channel conditions to the transmitter can allow near optimal channel adaptation. These practical systems, which are commonly referred to as limited or finite-rate feedback systems, supply benefits nearly identical to unrealizable perfect transmitter channel knowledge systems when they are judiciously designed. In this tutorial, we provide a broad look at the field of limited feedback wireless communications. We review work in systems using various combinations of single antenna, multiple antenna, narrowband, broadband, single-user, and multiuser technology. We also provide a synopsis of the role of limited feedback in the standardization of next generation wireless systems.read more
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Efficient Downlink Channel Probing and Uplink Feedback in FDD Massive MIMO Systems.
TL;DR: The sparse spatial scattering properties of the environment are used to estimate the support of the continuous, frequency-invariant scattering function from UL channel observations and use the resulting support estimate to design an efficient DL probing and UL feedback scheme in which the feedback dimension scales proportionally with the sparsity order of DL channel vectors.
Journal ArticleDOI
Adaptive codebook-based channel prediction and interpolation for multiuser multiple-input multiple-output–orthogonal frequency division multiplexing systems
Jiang Chang,I-Tai Lu,Yingxue Li +2 more
TL;DR: Simulation results show that the proposed adaptive codebook-based CSI prediction and interpolation scheme for multiuser MIMO–OFDM systems is effective in mitigating the performance loss due to quantisation, feedback delay and clustering feedback.
Proceedings ArticleDOI
Limited Feedback Scheme Using Constant Amplitude Codebook for Tomlinson-Harashima Precoding in Multi-User MIMO Systems
Chunlin Yan,Hidetoshi Kayama +1 more
TL;DR: In this paper, a constant amplitude codebook based feedback scheme for Tomlinson-Harashima precoding in multi-user multiple-input-multiple-output (MU-MIMO) systems was proposed.
Proceedings ArticleDOI
Mobility effect on the downlink performance of spatial multiplexing techniques under different scheduling algorithms in heterogeneous network
TL;DR: Which spatial multiplexing and scheduler combination is best suited for mobile users in a heterogeneous network (HetNet) is analyzed to conclude OLSM and CLSM.
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An Analytical Framework for Multi-Cell Cooperation via Stochastic Geometry and Large Deviations
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TL;DR: Analytically, results confirm analytically that cluster-edge mobiles are the bottleneck for network coverage and provide a plausible analytic framework for more realistic analysis of other multi-cell techniques.
References
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