초록 ▼

A system for locating a transmitter in an unknown location comprising apparatus and the method of receiving transmitted signals from said transmitter at the separated locations, demodulating the transmitted signals, performing a Fourier transformation of each of the demodulated signals to represent

A system for locating a transmitter in an unknown location comprising apparatus and the method of receiving transmitted signals from said transmitter at the separated locations, demodulating the transmitted signals, performing a Fourier transformation of each of the demodulated signals to represent them as complex functions of frequency, while performing a complex division of pairs of the signals represented as complex functions of frequency, to obtain signals represented by the phase differences between pairs of signals as functions of frequency, and determining from the difference in phase between pairs of signals as a function of frequency the time differences existing between the said pairs of functions. From these time differences the position of the origin of the transmitted signals are determined and displayed.

대표청구항 ▼

Apparatus for determining the location of a transmitter comprising: (a) receiving means including at least two spaced receivers for receiving electromagnetic radiation from the transmitter, (b) means for demodulating said radiation individually from each of said receivers, (c) means for Fourier tran

Apparatus for determining the location of a transmitter comprising: (a) receiving means including at least two spaced receivers for receiving electromagnetic radiation from the transmitter, (b) means for demodulating said radiation individually from each of said receivers, (c) means for Fourier transforming the demodulated radiation from each of said receivers, and for providing signals representative of the radiation as a function of frequency, (d) means for performing a complex division of each of said signals, to establish a signal representing the phase difference between the demodulated radiation from each of the signals, and (e) means for providing a signal representative of the time difference based on said phase difference for defining a hyperbolic surface of rotation on which the transmitter is located.