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Journal of Applied Remote Sensing • new

Intrapulse modulation type recognition for pulse compression radar signal
Author(s): Xiaolei Fan; Tao Li; Shaoying Su
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Paper Abstract

The existing modulation recognition algorithms for a pulse compression radar (PCR) signal can hardly adapt to complex modulation types and low signal-to-noise ratio (SNR). To solve the problems, with respect to the seven kinds of widely used PCR signals—including linear frequency modulation signal, Baker code, Frank code, P1 code, P2 code, P3 code, and P4 code—a modulation type recognition algorithm based on integrated quadratic phase function (IQPF) and fractional Fourier transform (FrFT) is proposed. First, signals are preclassified according to their chirp rates (CRs) estimated through IQPF. Then, FrFT is carried out depending on the order, which is correlated to the estimated CR. Finally, signals in each class are subdivided and modulation recognition is accomplished according to the features of the FrFT spectrum. The simulation results validate the feasibility of the algorithm. They also demonstrate that, compared against existing research, the proposal achieves better correct recognition performance for various modulation types under low SNR condition.

Paper Details

Date Published: 23 September 2017
PDF: 19 pages
J. Appl. Rem. Sens. 11(3) 035018 doi: 10.1117/1.JRS.11.035018
Published in: Journal of Applied Remote Sensing Volume 11, Issue 3
Show Author Affiliations
Xiaolei Fan, National Univ. of Defense Technology (China)
Tao Li, National Univ. of Defense Technology (China)
Shaoying Su, National Univ. of Defense Technology (China)

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