Paper Info
Title
Video-aware MIMO precoding with packet prioritization and unequal modulation
Abstract
Video streaming over wireless networks can achieve large quality and capacity gains from transmission techniques that are aware of the video content. This paper proposes modifying conventional multiple-input multiple-output (MIMO) systems to realize these gains by introducing video-aware PHY layer decisions. Specifically, a new PHY layer packet prioritization method is introduced that splits video data among spatial streams based on the packet loss visibility and per-stream SNRs. The objective is to maximize throughput weighted by packet loss visibility, a metric coined perceived throughput. The globally-optimal splitting policy among streams is derived. Furthermore, unequal modulation per stream is proposed and visibility-based packet dropping is optimized to satisfy delay constraints. We derive the gains vs. conventional MIMO precoding and prove that the gain is the throughput averaged over streams divided by the throughput of the worst stream.
Year
Venue
Keywords
2012
Signal Processing Conference
MIMO communication,modulation coding,precoding,radio networks,video coding,video streaming,PHY layer packet prioritization method,delay constraints,globally-optimal splitting policy,multiple-input multiple-output systems,packet loss visibility,packet prioritization,spatial streams,unequal modulation,video streaming,video-aware MIMO precoding,video-aware PHY layer decisions,visibility-based packet dropping,wireless networks
Field
DocType
ISSN
Wireless network,Computer science,Network packet,Packet loss,Computer network,MIMO,Real-time computing,Physical layer,Throughput,Precoding,Spatial multiplexing
Conference
2219-5491
ISBN
Citations 
PageRank 
978-1-4673-1068-0
4
0.40
References 
Authors
5
3
Name
Order
Citations
PageRank
Amin Abdel Khalek11257.44
Constantine Caramanis22022115.92
Robert W. Heath314415885.64