The Seattle IEEE MTT, A&P, EDS
IEEE Lecture for February 24th, 2005
Ultra-Wideband Radio Design for Multi-band OFDM 480 Mb/s Wireless USB
Please RSVP by email to tom@seaporttech.com
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DATE: |
Thursday, February 24th, 2005
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PLACE: |
Honeywell Learning Center |
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TIME: |
Dinner: 6:30 - 7:30pm |
Featuring: Abstract Biography Send comments and suggestions to tom@seaporttech.com
Lawrence Williams, Ansoft Corporation
The Multiband OFDM Alliance (MBOA) issued an ultrawideband (UWB) radio specification that may be applied to 480 Mb/s wireless USB applications. This presentation details the design and simulation of a direct-conversion radio architecture in support of this MBOA proposal. This presentation begins with a review of UWB technology and applications followed by link budget analysis to generate top-level design specifications for the analog radio blocks. A behavioral-level DSP design kit is briefly described to illustrate how modern electronic design automation (EDA) tools can be leveraged to generate and detect the complex waveforms such as those used in UWB. The core of the presentation covers design of individual circuit blocks that comprise the radio with all circuit design based on the UMC 0.13 um CMOS process. Radio transmitter and receiver design is covered with emphasis on the I/Q modulator and demodulator, synthesizer, T/R switch, low-noise amplifier, and transmit power amplifier.
The UWB radio design work is part of a larger collaboration between Ansoft and UMC to develop an electromagnetics-based design flow for RF CMOS. Our goal is to propose an architecture and demonstrate radio design, simulation, and fabrication using Ansoft's design flow and UMC's foundry process, respectively. Ansoft is designing the circuits; UMC is performing layout and fabrication. The result of this effort will validate the Ansoft design flow for high-performance radio circuits, validate UMC's process for UWB circuits, and will provide a reference design for UMC and Ansoft customers.
Lawrence Williams is Director of Business Development at Ansoft Corporation where he is responsible for building strategic relationships with Ansoft customers and business partners. He has over 18 years experience in the fields of electromagnetics and communications engineering and has published numerous technical papers on the subject. Prior to Ansoft, Lawrence held various senior engineering positions in the Engineering Division of Hughes Aircraft Company, Radar Systems Group. He received his Masters, Engineers, and Ph.D. degrees from UCLA in 1989, 1993 and 1995, respectively.