DocumentCode :
392349
Title :
A novel architecture for robust video transmission in MC-CDMA cellular networks over slow fading channels
Author :
Hueda, Mario R.
Author_Institution :
Digital Commun. Res. Lab., Univ. Nacional de Cordoba, Argentina
Volume :
2
fYear :
2002
fDate :
17-21 Nov. 2002
Firstpage :
1743
Abstract :
Reliable interactive video transmission in CDMA cellular networks is difficult since residual channel errors cannot be avoided and the available bandwidth is scarce. In order to improve quality of the decoded video, this paper introduces a novel architecture for reliable transmission in multicode DS-CDMA (MC-CDMA) systems. Unlike previous protection schemes, the new architecture not only improves video quality, but it also achieves an efficient use of the available resources in the network. As an application of this concept, we propose a robust scheme for reliable video communication from wired users to mobile users in slow fading environments. Our approach consists of two main ingredients: a novel closed-loop error control technique to reduce packet loss and interference, and a new scheme to stop error propagation in the decoded sequence originating from residual channel errors. Based both on theoretical analysis and numerical results, we show that our approach achieves important improvements in the quality of the decoded video with low additional complexity.
Keywords :
cellular radio; code division multiple access; decoding; error correction codes; fading channels; packet radio networks; spread spectrum communication; video coding; visual communication; CDMA; MC-CDMA cellular networks; architecture; closed loop error control; decoded sequence; decoded video; error control technique; error propagation; interference; multicode DS-CDMA; multicode direct sequence code division multiple access; packet loss; reliable interactive video transmission; residual channel errors; robust video transmission; slow fading channels; video quality; Bandwidth; Decoding; Error correction; Fading; Land mobile radio cellular systems; Multiaccess communication; Multicarrier code division multiple access; Protection; Robustness; Telecommunication network reliability;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
Print_ISBN :
0-7803-7632-3
Type :
conf
DOI :
10.1109/GLOCOM.2002.1188497
Filename :
1188497
Link To Document :
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