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
Citations
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Journal ArticleDOI
Two New Kinds of Interference Alignment Schemes for Cellular $K$ -User MIMO Downlink Networks
TL;DR: In this article, two new interference alignment (IA) schemes, namely the retrospective interference regeneration (RIR) scheme and the beamforming based distributed retrospective interference alignment(B-DRIA) scheme, are proposed for cellular $K$ -user MIMO downlink networks.
Journal ArticleDOI
Multicast Networks With Variable-Length Limited Feedback
TL;DR: This work proposes a variable-length global quantizer that knows perfect CSI and sends quantized CSI to the transmitter and receivers and proves that the proposed quantizer is able to achieve the minimum outage probability with a low average feedback rate.
Proceedings ArticleDOI
Optimal Combining of Instantaneous and Statistical CSI in the SIMO Interference Channel
TL;DR: The uplink of the two-user multiple-antenna interference channel is considered and the optimal beamforming (BF) problem is posed and solved and new user scheduling schemes are proposed, which exploit the derived BF solution and allow an efficient use of combined instantaneous and statistical information.
Journal ArticleDOI
Bit Allocation and Statistical Precoding for Correlated MIMO Channels With Limited Feedback
TL;DR: Simulations show that the combination of statistical precoding and VQ-based quantization for BA leads to good performance with a small number of feedback bits.
Advanced Wireless Local Area Networks in the Unlicensed Sub-1GHz ISM-bands
TL;DR: In this paper, the authors proposed an IEEE 802.11ah WLAN protocol for the sub-1GHz (S1G) industrial, scientific, and medical (ISM) band.
References
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