In this paper we describe the implementation of a complete 128-tap (16-ms span) digital voice echo canceller on a Texas Instruments TMS32020 programmable signal processor. A block update method is used in the filter coefficients adaptation. The method exhibits better convergence properties and computational efficiency than the standard stochastic gradient method.The echo canceller implementation features a direct interface for standard PCM codecs and meets the requirements of the CCITT recommendation G.165. A hardware demonstration system has been constructed and tested and its performance exceeds that of commercially available products.
A new generation of battery operated wireless sensor networks are transforming the transportation industry. With their ease of deployment, low maintenance cost, and accuracy these wireless sensing platforms are providing significant improvements in the quality and quantity of data and performance measures enabling a wide range of applications from traffic signal control, to freeway management, to traveler information systems, and parking management systems. The fast adoption rate of this disruptive technology in transportation is opening the door to exciting new research areas ranging from new sensing modalities, to improved RF range, to the challenging problem of managing the vast amounts of data generated and developing the analytical tools to turn the data into useful information. The talk will describe the current state-of-the-art for wireless sensor networking in transportation and discuss the new frontiers of research in that area.Bio: Over the past two decades Dr. Amine Haoui-a wireless communications pioneer-has founded and led several emerging technology companies. In 1985, Dr. Haoui launched the wireless communications division at TCSI, which grew to become a leading developer of DSP and digital cellular technologies before the group's successful IPO in 1989. As co-founder of Diva Communications-an innovator in the wireless loop industry-Dr. Haoui served as CEO before acquisition by InnoMedia in 1999. He then served as InnoMedia's Executive VP for the next four years. Dr. Haoui is currently the CEO of Sensys Networks which he co-founded in 2003. Sensys Networks it the world's leading provider of wireless traffic detection and integrated traffic data systems enabling accurate data acquisition for transportation agencies on an unparalleled scale. Sensys Networks 2010 debut at 80th position on the Inc. 500/5000 fastest growing private US companies list is the result of a rapidly accelerating adoption rate and phenomenal three-year growth. Dr. Haoui holds a Ph.D. in Electrical Engineering from UC Berkeley, a M.Sc. and B.Sc. in Electrical Engineering from the University of Michigan at Ann Arbor.
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