Filtering Chirp Waveforms without Producing unwanted Sidelobes
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Date
2005-06
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Addis Ababa University
Abstract
Regardless of the type of waveforms implemented by a radar, using a matched filter
at the receiver yields the maximum signal to noise ratio (SNR). Unfortunately, when one
applies matched filtering technique in filtering chirp waveforms, it produces unwanted
sidelobes at the output of the receiver. In this case it is difficult to pinpoint whether
the radar signal is coming from the main peaks or from the sidelobes. This can be a
major problem especially when main scatterer lies at the sidelobes. In other words, there
will be ambiguity in the measurements. Here we present a new method of filtering chirp
waveforms that suppresses the unwanted sidelobes. The method is developed based on an
earlier work that has been applied to solve a similar problem created in filtering binary
phase coded waveforms by means of matched filter [2]. Abiyu Zerfu: June, 2005, Addis
Ababa
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Filtering Chirp Waveforms