Intercept of frequency agility signal using coding Nyquist folding receiver

Authors:
Keyu Long
Affiliations:
School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, China
Venue:
WSEAS Transactions on Signal Processing
Year:
2011

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Abstract

The parameter estimation of the frequency agility (FA) signal using the coding Nyquist folding receiver (CNYFR) is presented. The estimation algorithm adopting linear frequency modulation (LFM) as the local analogue modulation is derived. The Nyquist zone is estimated by the pseudo Wigner-Ville distribution (PWVD) and the hopping frequencies are calculated by the maximum likelihood (ML) method. Simulations show that CNYFR with analogue modulation of LFM has better performance than the sinusoidal frequency modulation (SFM) one, and the parameter estimation accuracy is acceptable when the SNR is above 0dB.