Research Article
A New LFM-Signal Detector Based on Fractional Fourier Transform
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* Corresponding author: Weidong Chen wdchen@ustc.edu.cn
Department of Electronic Engineering and Information Science, University of Science and Technology of China, HeFei AnHui, 230027, China
EURASIP Journal on Advances in Signal Processing 2010, 2010:876282 doi:10.1155/2010/876282
Published: 12 July 2010Abstract
A new LFM-signal detector formulated by the integration of the 4th-power modulus of
the fractional Fourier transform is proposed. It has similar performance to the modulus
square detector of Radon-ambiguity transform because of the equivalence relationship
between them. But the new detector has much lower computational complexity in the
case that the number of the searching angles is far less than the length of the signal.
Moreover, it is proved that the new detector can be generalized to the integration
of the nth-power (
) modulus of the fractional Fourier transform via mathematical derivation. Computer
simulation results have confirmed the effectiveness of the proposed detector in LFM-signal
detection.
