NDLI: Low feedback downlink SDMA using single antenna MIMO-like detection

Content Provider	IEEE Xplore Digital Library
Author	Ezri, D. Tsodik, G.
Copyright Year	2012
Description	Author affiliation: Greenair Wireless, Ramat Gan, Israel (Ezri, D.) \|\| AutoTalks, Kfar Netter, Israel (Tsodik, G.)
Abstract	Space division multiple access (SDMA) is considered one of the key techniques enabling 4G spectral efficiency and capacity, and has been adopted by various advanced communications standards such as LTE and IEEE802.11ac. One of the challenges in downlink (DL) SDMA is obtaining adequate channel state information at the base-station (BS) transmitter to minimize multi user interference (MUI). MUI minimization requires the BS to acquire accurate channel state information respective to the mobiles, achieved in the form of feedback. Digital feedback is usually made of a quantized version of either the channel matrix or the singular vectors. Naturally, finer quantization leads to more accurate channel state information and less MUI, but also to higher feedback capacity. Minimizing MUI is especially important when the number of transmitted SDMA streams is larger than the number of receive antennas at the mobiles, for example when a BS transmits M SDMA streams to M mobiles, each endowed with a single receive antenna. Here the mobiles do not have enough degrees of freedom to suppress the MUI, for example through an MMSE receiver (which would be possible if each mobile had at least M receive antennas). In this paper we propose MIMO-like ML detection of all M SDMA information streams at each of the mobiles (each is endowed with a single antenna). Here each mobile discards all the irrelevant streams, targeting other mobiles, post ML detection. Although counter-intuitive, when the optimal nonlinear ML detector is employed, the standard requirement of N ≥ M receive antennas for spatial multiplexing detection is essentially eliminated. This approach is immediately extended to the case of N < M receive antennas at the mobile, where N is not necessarily 1. The proposed method significantly outperforms standard detectors in the regime of high MUI due to insufficient feedback quantization. Thus, it paves the way to a significant decrease in feedback capacity and relaxed SDMA group selection.
Starting Page	1
Ending Page	5
File Size	202530
Page Count	5
File Format	PDF
ISBN	9781467346825
e-ISBN	9781467346818
DOI	10.1109/EEEI.2012.6376929
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-11-14
Publisher Place	Israel
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Detectors Vectors MIMO Joints Mobile communication Bit error rate Multi user interference SDMA Low rate feedback Group selection
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

A joint precoding scheme for downlink multi-user MIMO systems

Interference-free multi-user MIMO-OFDM

A vector perturbation based user selection for multi-antenna downlink channels

A Low-Complexity SDMA Grouping Strategy for the Downlink of Multi-User MIMO Systems

Differential Evolution Algorithm Aided Minimum Symbol Error Rate Multi-User Detection for Multi-User OFDM/SDMA Systems

An Algorithm for 2-User Downlink SDMA Beamforming with Limited Feedback for MIMO-OFDM Systems

Multi-user MIMO SDMA system in broadband WLAN

A joint SDMA and interference suppression multiuser transmission scheme for millimeter-wave massive MIMO systems

Near optimum low complexity MMSE multi-user detector

Low feedback downlink SDMA using single antenna MIMO-like detection

Similar Documents

A joint precoding scheme for downlink multi-user MIMO systems

Interference-free multi-user MIMO-OFDM

A vector perturbation based user selection for multi-antenna downlink channels

A Low-Complexity SDMA Grouping Strategy for the Downlink of Multi-User MIMO Systems

Differential Evolution Algorithm Aided Minimum Symbol Error Rate Multi-User Detection for Multi-User OFDM/SDMA Systems

An Algorithm for 2-User Downlink SDMA Beamforming with Limited Feedback for MIMO-OFDM Systems

Multi-user MIMO SDMA system in broadband WLAN

A joint SDMA and interference suppression multiuser transmission scheme for millimeter-wave massive MIMO systems

Near optimum low complexity MMSE multi-user detector

Low feedback downlink SDMA using single antenna MIMO-like detection