NDLI: Multipath echo cancellation in FM transmission using adaptive FIR filters

Content Provider	IEEE Xplore Digital Library
Author	Kammeyer, K.
Copyright Year	1986
Description	Author affiliation: Technische Universität Hamburg-Harburg, Hamburg, Germany (Kammeyer, K.)
Abstract	Multipath propagation in conventional FM broadcasting is a severe problem since this phenomenon results in nonlinear distortions after demodulation. In the present paper a solution is given for equalization of the multipath transfer function using FIR digital filters. The main idea is to take advantage of some a-priori knowledge of the multipath channel which reduces the number of the complex equalizer coefficients to 5 or 6. For adaptive adjustment we apply the well-known gradient algorithm using the absolute value of the complex FM envelope as a quality criterion which has to be minimized. Some examples will be given to illustrate the convergence behaviour of the algorithm and the real-time performance of the digital equalizer.
Starting Page	1305
Ending Page	1308
File Size	124705
Page Count	4
File Format	PDF
DOI	10.1109/ICASSP.1986.1168732
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1986-04-07
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Echo cancellers Finite impulse response filter Transfer functions Equalizers Demodulation Multipath channels Baseband Nonlinear distortion Delay Frequency
Content Type	Text
Resource Type	Article

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Multipath echo cancellation in FM transmission using adaptive FIR filters