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A TUNABLE HETERODYNE FILTER DESIGN ON RECONFIGURABLE FABRIC

SANJAY SHARMA

Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur, Punjab, India

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R. C. CHAUHAN

Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur, Punjab, India

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, and

SANJAY ATTRI

Technical Teachers Training Institute, Chandigarh, India

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https://doi.org/10.1142/S0218126604001805Cited by:1 (Source: Crossref)

Abstract

This paper presents the design of tunable heterodyne filter that can be used very effectively in the elimination of narrowband interference in wide-band communications. The filter makes use of the heterodyne process to create a tunable notch filter from a fixed coefficient high-pass filter. It has been shown that it is possible to generate a signal that can be used to set the heterodyne frequency to match the tunable heterodyne notch filter to the center of the detected interference through the use of a simple second order IIR band-pass filter to detect the narrowband interference. Moreover various options have been illustrated for the implementation of heterodyne filters using Xilinx Virtex field programable gate arrays (FPGAs).

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