An integrated testbed for wireless multimedia computing

Chien, Charles; Nazareth, Sean; Lettieri, P.; Molloy, S.; Schoner, B.; Boring, Walter A.; Chen, Joey; Deng, Christopher; Mangione-Smith, William H.; Jain, Rajeev

doi:10.1007/bf01130401

Cited by 11 publications

(1 citation statement)

References 8 publications

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“…Other examples of system design projects include: the Infopad project at UC Berkeley [5], the Wireless Modem project at UCLA [6], and the Broadband Wired and Wireless Modem project at IMEC [7]. These projects are system design efforts that include a multi-disciplinary research with an intense interaction with the system industry.…”

Section: Introductionmentioning

confidence: 99%

System level design as applied to CMU wearable computers

Smailagic¹,

Siewiorek²

Proceedings IEEE Computer Society Workshop on VLSI'98 System Level Design (Cat. No.98EX158)

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The paper describes a system level design approach to the wearable computers project at Carnegie Mellon University (CMU). The project is an unique example of a cross-disciplinary effort, drawing students from mechanical engineering, electrical and computer engineering, computer science, and industrial design. Over the last six and half years that the course has been taught, teams of undergraduate and graduate students have designed and fabricated sixteen new generations of wearable computers, using an evolving artifact-specific, multidisciplinary design methodology. The complexity of their architectures has increased by a factor of over 200, and the complexity of the application has also increased significantly. We introduce a metric to compare wearable computers and show that their performances have increased by several orders of magnitude. A system-level approach to power / performance optimization is going to be a crucial catalyst for making wearable computers an everyday tool for the general public.

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Section: Introductionmentioning

confidence: 99%

System level design as applied to CMU wearable computers

Smailagic¹,

Siewiorek²

Proceedings IEEE Computer Society Workshop on VLSI'98 System Level Design (Cat. No.98EX158)

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Smailagic

Siewiorek

1999

The Journal of VLSI Signal Processing

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Adaptive radio for multimedia wireless links

Chien

Srivastava

Jain

et al. 1999

IEEE J. Select. Areas Commun.

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The quality of wireless links suffers from timevarying channel degradations such as interference, flat-fading, and frequency-selective fading. Current radios are limited in their ability to adapt to these channel variations because they are designed with fixed values for most system parameters such as frame length, error control, and processing gain. The values for these parameters are usually a compromise between the requirements for worst-case channel conditions and the need for low implementation cost. Therefore, in benign channel conditions these commercial radios can consume more battery energy than needed to maintain a desired link quality, while in a severely degraded channel they can consume energy without providing any quality-of-service (QoS). While techniques for adapting radio parameters to channel variations have been studied to improve link performance, in this paper they are applied to minimize battery energy. Specifically, an adaptive radio is being designed that adapts the frame length, error control, processing gain, and equalization to different channel conditions, while minimizing battery energy consumption. Experimental measurements and simulation results are presented in this paper to illustrate the adaptive radio's energy savings.

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An integrated testbed for wireless multimedia computing

Cited by 11 publications

References 8 publications

System level design as applied to CMU wearable computers

System level design as applied to CMU wearable computers

Untitled

Adaptive radio for multimedia wireless links

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