Carol Barrett Home Page

Current research on wireless RF transceivers empahsizes both higher integration and the ability to adapt to multiple communication standards. Higher integration can be obtained by using receiver architectures, such as wideband IF with double conversion (WIF), that perform channel select filtering on-chip at baseband. Performing this baseband channel select filtering in the digital domain allows for the programmability necessary to adapt to the different channel banwidths, sampling rates, and CNR requirements of multiple communication standards. At the back end of a wide-dynamic range sigma-delta modulator,a decimation filter can select a desired channel in the presence of both strong adjacent channel interferers and quantization noise from the digitization process.

The focus of this project is to design a power-optimized decimation filter that demonstrates the ability to perform digital channel select filtering for both the GSM (cellular) and DECT (cordless) standards. Automatic gain control is used within the filter to reduce the dynamic range and therefore the power consumption. The filter adapts to the different standards by using a technique in which portions of the circut are powered down in each mode. This adjusts the frequency response and saves additional power consumption.

My advisor is Paul Gray at the University of California at Berkeley.

Slides

C. Barrett "Low-Power Decimation Filter Design for Multi-Standard Transceiver Applications," (PDF), October 1997.

C. Barrett "Low-Power Decimation Filter for Multi-Standard Transceiver Applications," (GIF/MIF/PS), March 1997.

Thesis

Carol Barrett "Low-Power Decimation Filter Design for Multi-Standard Transceiver Applications," (PDF), December 1997.

C.J. Barrett
University of California
211-2 Cory Hall EECS UCB
Berkeley, CA 94720-1772

Email:  cjb@eecs.berkeley.edu
Office: (510) 642-9399
FAX:    (510) 642-2739

finger cjb@eecs.berkeley.edu