Paper Info
Title
Multi-Antenna Multicasting with Opportunistic Multicast Scheduling and Space-Time Transmission
Abstract
Physical layer multicasting with opportunistic user selection and optimized space-time transmission is examined in this work. We consider a multi-antenna downlink scenario where a multi-antenna base-station transmits common information to a given set of users, each with a single receive antenna. In the past, most existing multi-antenna multicasting solutions have been restricted to spatial multiplexing and transmit beamforming. Here, we adopt the opportunistic multicast scheduling (OMS) scheme, where messages are encoded using fountain codes and an optimal subset of users is targeted for reception in each time slot. Capitalizing on extreme value theory, we derive analytical expressions for the average system throughput and utilize this result to obtain the optimal user selection ratio for both spatial multiplexing and transmit beamforming scenarios. To better utilize the channel state information available at the transmitter, we further consider an optimized space-time transmission (OST) scheme where the statistics of the space-time codeword is chosen to maximize the rate of the worst selected user. For reduced complexity, we utilize a semi-orthogonal user selection algorithm to determine the spatial dimensions of the signal and derive optimal power allocation across these dimensions. The proposed OST is a generalization of transmit beamforming and spatial multiplexing and, thus, outperforms both conventional schemes.
Year
DOI
Venue
2010
10.1109/GLOCOM.2010.5683996
GLOBECOM
Keywords
Field
DocType
channel state information,radio links,optimized space-time transmission,multi-antenna downlink,optimal power allocation,receiving antennas,space division multiplexing,semi-orthogonal user selection algorithm,single receive antenna,array signal processing,fountain codes,optimal user selection ratio,space communication links,opportunistic multicast scheduling,multi-antenna multicasting,space-time codeword,physical layer multicasting,multi-antenna base-station,spatial multiplexing,transmit beamforming,extreme value theory,multicast communication,multiplexing,covariance matrix,optimization,base station,wireless communication,space time,throughput,signal to noise ratio,physical layer
Beamforming,Fountain code,Computer science,Selection algorithm,Computer network,Multicast,Throughput,Multiplexing,Spatial multiplexing,Channel state information
Conference
ISSN
ISBN
Citations 
1930-529X E-ISBN : 978-1-4244-5637-6
978-1-4244-5637-6
3
PageRank 
References 
Authors
0.39
10
4
Name
Order
Citations
PageRank
Tze-ping Low1816.38
Po-Chun Fang230.39
Y.-W. Peter Hong319020.05
C.-C. Jay Kuo47524697.44