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Programmable IF architecture for multi-standard software defined radios

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3 Author(s)
F. Sheikh ; Dept. of Comput. Sci. & Eng., Lahore Univ. of Manage. Sci., Pakistan ; S. Masud ; A. Loan

An improved intermediate frequency (IF) architecture for software defined radios is presented. This architecture is programmable, reconfigurable and suited to hardware implementation. The architecture is based on a computationally efficient method of extracting multiple channels belonging to two different communication standards, GSM and IS-95. The core of the system comprises of polyphase DFT filterbanks and very economical fractional rate-change filters. A flexible and efficient sample rate conversion method is also proposed that performs common rate changes using a shared hardware structure. Computational and hardware complexity comparisons are made based on results from a simulation test-bed developed for the proposed system.

Published in:

IEEE Workshop on Signal Processing Systems Design and Implementation, 2005.

Date of Conference:

2-4 Nov. 2005