Target location from the estimated instantaneous received frequency
2011
Presented is a method to blindly estimate the location of a transmitter from the signal observed by a single
moving receiver. This process is based on the observation that the observed Doppler characteristics are essentially
uniquely determined by the transmission frequency, the location of the transmitter, and the time-varying flight
path of the receiver. We accurately estimate the instantaneous frequency of the received signal and blindly
calculate the transmitted frequency from the received signal and the instantaneous position and velocity of the
receiver. The transmitter location is then estimated by minimizing a cost function representing the difference
between the Doppler characteristics calculated from the relative geometry of the transmitter and receiver and
the Doppler characteristics estimated from the received signal. The method has the advantages that only one
receiving antenna is required and the emitter may be located with no a priori knowledge of the emitter location
or frequency. In addition, the process is essentially independent of the flight path of the receiver.
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