By Topic

A CMOS channel-select filter for a direct-conversion wireless receiver

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Chang, P.J. ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Rofougaran, A. ; Abidi, A.A.

This paper describes the design and performance of an SC channel select filter for a frequency-hopped spread-spectrum direct-conversion receiver operating in the 902-926 MHz ISM band. Data modulates a hopped carrier by one of two (or four) prescribed frequency offsets, such that the modulated spectrum is always contained within +200 kHz of the carrier. Following preselection of the 26 MHz-wide ISM band at RF, an agile local oscillator synchronized to the hopping pattern of the received signal downconverts the band to bring the sought channel to DC. The channel-select filter passband extends 220 kHz around DC, and the adjacent channel 320 kHz away from the carrier defines the filter's stopband edge. System simulations suggest that if all ISM-band users in a cell abide by power control, then to detect the desired channel with a sufficiently high signal-to-interference ratio, the filter must attenuate adjacent channels by at least 45 dB.

Published in:

VLSI Circuits, 1996. Digest of Technical Papers., 1996 Symposium on

Date of Conference:

13-15 June 1996