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Frame Synchronization for Code Shifted Reference and Differential Code Shifted Reference Impulse Radio Ultra Wideband Transceivers

February 18, 2011
5:30 pmto6:30 pm

The IEEE Canadian Atlantic Section Communications Chapter and Signal Processing and Microwave Theory and Techniques Chapter invite you to the following seminar event which is open to public and the details are as follows:

Title: Frame Synchronization for Code Shifted Reference and Differential Code Shifted Reference Impulse Radio Ultra Wideband Transceivers
Speaker: Dr. Hong (Jeffery) Nie, Assistant Professor, Department of Industrial Engineering, University of Northern Iowa
Time: 5:30pm-6:30pm, Friday, February 18, 2011
Place: Room B311, Sexton Campus, Dalhousie University, 1360 Barrington Street, Halifax, Nova Scotia, Canada
Refreshments: Refreshments will be provided to the attendees
Local Contacts: Mr. Scott Melvin at Scott <dot> Melvin <at> ieee <dot> org or Dr. Zhizhang (David) Chen at z <dot> chen <at> dal <dot> ca, Department of Electrical and Computer Engineering, Dalhousie University, Tel: (902) 494-3996


In impulse radio (IR) Ultra Wideband (UWB) systems, short-duration pulses are employed for signal transmission. Thus, the received IR UWB signals consist of a large amount of resolvable multi-path components (MPCs), which make Rake or selective Rake receivers infeasible because of formidable complexity on channel estimations. Among the existing IR UWB transceivers requiring no channel estimation, Transmitted Reference (TR) transceiver asks for an analog delay element with ultra wide bandwidth, which makes it very difficult to implement with low complexity and low power hardware systems, especially at the integrated circuit level. Frequency-shifted Reference (FSR) transceiver avoids the use of the delay element, but multiple analog carriers are employed in both the FSR transmitter and receiver, which not only increases system complexity but also degrades system performance. Code Shifted Reference (CSR) and Differential Code Shifted Reference (DCSR) transceivers requires neither delay element nor analog carrier, and hence can achieve better system performance while maintaining lower system complexity. Therefore, CSR and DCSR transceiver have been considered a promising IR UWB transceiver technology.

In the CSR and DCSR transceivers, data pulse sequences and reference pulse sequences are shifted with multiple sets of digital codes with finite length. Thus, frame synchronization that identifies the boundary of those digital codes becomes a key function in the CSR and DCSR receivers. In this seminar, a thorough discussion about the frame synchronization for the CSR and DCSR receivers will be delivered through theoretical analysis and computer simulations.

About the Speaker:

Hong Nie received his Bachelor and Master degrees in Electronic Engineering in 1993 and 1995 from Tsinghua University, Beijing, China, and his Ph.D. degree with specialization in wireless communications in 2004 from University of British Columbia, Vancouver, British Columbia, Canada.

He is currently an assistant professor at the Department of Industrial Technology, University of Northern Iowa, Cedar Falls, Iowa, US, where he leads various research projects on impulse radio ultra wideband technologies for wireless sensor transceivers, advanced wireless transceiver architectures for sensors in industrial environments, and industrial applications of wireless sensor networks. Before joining University of Northern Iowa, he worked as an electronics instructor and senior research scientist at the Engineering Department of Cape Breton University, Sydney, Nova Scotia, Canada from 2003 to 2006.

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