Performance of Orthogonal Beamforming for SDMA With Limited Feedback

On the multiantenna broadcast channel, the spatial degrees of freedom support simultaneous transmission to multiple users. The optimal multiuser transmission, which is known as dirty paper coding, is not directly realizable. Moreover, close-to-optimal solutions such as Tomlinson-Harashima precoding...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology Vol. 58; no. 1; pp. 152 - 164
Main Authors: Huang, Kaibin, Andrews, Jeffrey G., Heath, Robert W.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.01.2009
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Applied sciences
Array signal processing
Asymptotic properties
Base stations
Beamforming
Broadcast channels
Broadcasting
Cellular
Channel state information
Channels
Coding, codes
Control systems
Control theory
Convertors
Detection, estimation, filtering, equalization, prediction
Electrical engineering. Electrical power engineering
Electrical machines
Exact sciences and technology
Feedback
feedback communication
Information, signal and communications theory
Interference constraints
Multiaccess communication
multiuser channels
Noise robustness
Signal and communications theory
Signal to noise ratio
Signal, noise
space division multiplexing
Studies
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Throughput
Transmission and modulation (techniques and equipments)
Performance evaluation
Parameter estimation
space division multiplexing
Current source converter
Base station
Information rate
Feedback regulation
Multiuser channels
Beam forming
Codebook
Coding
Channel estimation
Broadcast channels
Traffic control
feedback communication
Antenna
Multiple access
Quantization error
Coding circuit
Flow rate regulation
Teletraffic
Information transmission
Space division multiple access
Scaling law
Traffic management
Optimal solution
Numerical simulation
Signal to noise ratio
ISSN:0018-9545, 1939-9359
Online Access:Get full text
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Summary:On the multiantenna broadcast channel, the spatial degrees of freedom support simultaneous transmission to multiple users. The optimal multiuser transmission, which is known as dirty paper coding, is not directly realizable. Moreover, close-to-optimal solutions such as Tomlinson-Harashima precoding are sensitive to channel state information (CSI) inaccuracy. This paper considers a more practical design called per user unitary and rate control (PU2RC), which has been proposed for emerging cellular standards. PU2RC supports multiuser simultaneous transmission, enables limited feedback, and is capable of exploiting multiuser diversity. Its key feature is an orthogonal beamforming (or precoding) constraint, where each user selects a beamformer (or precoder) from a codebook of multiple orthonormal bases. In this paper, the asymptotic throughput scaling laws for PU2RC with a large user pool are derived for different regimes of the signal-to-noise ratio (SNR). In the multiuser interference-limited regime, the throughput of PU2RC is shown to logarithmically scale with the number of users. In the normal SNR and noise-limited regimes, the throughput is found to scale double logarithmically with the number of users and linearly with the number of antennas at the base station. In addition, numerical results show that PU2RC achieves higher throughput and is more robust against CSI quantization errors than the popular alternative of zero-forcing beamforming if the number of users is sufficiently large.
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2008.925003