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Proceedings Paper

Adaptive multichannel modulation for variable QoS multimedia applications in survivable mobile wireless communications
Author(s): John E. Kleider; Glen P. Abousleman
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Paper Abstract

In this paper, we present an optimal, low-complexity method of transmitting digitally compressed imagery through interference-dominated and frequency-selective fading channels. The proposed method combines a wavelet-based image coder that employs phase scrambling and variable quality-of-service (VQoS) channel-optimized trellis-coded quantization (COTCQ), and VQoS multicarrier (MC) power allocation across the channel. Optimal image quality is achieved through a joint iterative process between the image coder and MC allocation algorithm. Using our VQoS allocation method, we show that the image quality can be improved significantly, as compared to an approach that uses a fixed QoS allocation across the channel. Further, this improvement extends to a variety of channels, including those that exhibit jamming interference and frequency-selective fading. The method is also shown to be computationally efficient.

Paper Details

Date Published: 28 August 2001
PDF: 8 pages
Proc. SPIE 4395, Digital Wireless Communication III, (28 August 2001); doi: 10.1117/12.438295
Show Author Affiliations
John E. Kleider, Motorola (United States)
Glen P. Abousleman, Motorola (United States)


Published in SPIE Proceedings Vol. 4395:
Digital Wireless Communication III
Raghuveer M. Rao; Soheil A. Dianat; Michael D. Zoltowski, Editor(s)

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