Paper Info
Title
A joint source coding-power control approach for video transmission over CDMA networks
Abstract
We consider future generation wireless code-division multiple-access (CDMA) cellular networks supporting heterogeneous compressed video traffic and investigate transport schemes for maximizing the number of users that can be supported in a single cell while simultaneously maximizing the reconstructed video quality of individual users. More specifically, we demonstrate that the network resources consumed by an individual user in a spread-spectrum CDMA network can be taken as the product of the allocated source-coding rate Rs and the energy per bit normalized to the multiple-access interference noise density γb. We propose a joint source coding and power control (JSCPC) approach for allocating these two quantities to an individual user, subject to a constraint on the total available bandwidth, to simultaneously maximize the per-cell capacity while maximizing the quality of the delivered video to individual users. We demonstrate the efficacy of this approach using the ITU-T H.263+ video source coder, although the approach is generally applicable to other source-coding schemes as well. The results indicate a significant improvement in delivered quality-of-service (QoS), measured in terms of the end-user average peak signal-to-noise ratio, that can be achieved at a given level of network loading. Furthermore, we demonstrate that without an appropriate JSCPC strategy the traditional soft-capacity limit associated with CDMA networks is no longer present. Indeed, a precipitous decrease in performance can be expected with increasing load. We show that this behavior can be avoided with the proposed JSCPC approach, thereby significantly extending the useful capacity of the CDMA network while exhibiting a more graceful degradation pattern under increasing load.
Year
DOI
Venue
2003
10.1109/JSAC.2003.815228
IEEE Journal on Selected Areas in Communications
Keywords
DocType
Volume
cdma network,reconstructed video quality,spread-spectrum cdma network,network loading,individual user,proposed jscpc approach,video transmission,joint source coding-power control,video traffic,network resource,video source coder,cellular network,graceful degradation,peak signal to noise ratio,quality of service,code division multiple access,spread spectrum communication,power control,source coding,video quality,source code,spread spectrum
Journal
21
Issue
ISSN
Citations 
10
0733-8716
42
PageRank 
References 
Authors
2.20
17
2
Name
Order
Citations
PageRank
Yee Sin Chan11198.39
J. W. Modestino234689.03