Many modern radar systems are overcoming the need for highpower transmitters by utilizing low peak-power, high duty-cycle waveforms, making noncooperative detection methods by traditional electronic surveillance a difficult task. This technological difficulty is driving a need for computationally tractable detection and characterization algorithms. Here, a practical method for detecting and fully characterizing an arbitrary number of low-power linear frequency modulated continuous wave (LFMCW) radar signals is achieved by dividing the time-domain signal into contiguous segments and treating each signal segment as a sum of harmonic components corrupted by noise with an unknown, time-varying power spectral density. This method is developed analytically and evaluated experimentally, revealing that the practicality of the method comes at the expense of a loss in estimation accuracy when compared to the Cramer-Rao lower bound. Experimental results indicate that the parameters of two simultaneous LFMCW signals can be estimated to within 10% of their true values with probability greater than 90% when input signal-to-noise ratios are -10 dB and above with a 25 MHz bandwidth receiver.
Interception of Multiple Low-Power Linear Frequency Modulated Continuous Wave Signals
IEEE Transactions on Aerospace and Electronic Systems ; 53 , 2 ; 789-804
01.04.2017
1265430 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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