Radio frequency emitter detection and location method and system
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorKent Olof Falk
Life of this patent
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Abstract
A system and method for detecting and locating a radio frequency emitter. A number, N, of receiving units using the same bandwidth, center frequency, and measurement time duration receive signals from the emitter. Higher Order Statistics (HOS) are used to calculate a correlation function between the received signals using one of the received signals as a reference. Results of the correlation function are used to form volumes of probabilities in a subset of an N−1 dimensional space of information regarding the location of the emitter. Each correlation function result in the subset corresponds to a single point in physical space.
Claims14
A method of detecting and locating a radio frequency emitter, said method comprising the steps of:
- receiving a number of signals (s0, s1 . . . sN-1) from the emitter by a number (N) of receiving units using the same bandwidth (B), centre frequency (fc) and measurement time duration (T), wherein N is at least three;
- utilizing Higher Order Statistics (HOS) to calculate a correlation function (c) between the received signals using one of the received signals (s0) as a reference;
- and
- utilizing results of the correlation function to form volumes of probabilities in a subset of an N−1-dimensional space of information regarding the location of the emitter, wherein each correlation function result in the subset corresponds to a single point in physical space.
A system for detecting and locating a radio frequency emitter, comprising:
- a number (N) of receiving units for receiving a number of signals (s0, s1 . . . sN-1) from the emitter, said receiving units utilizing the same bandwidth (B), center frequency (fc) and measurement time duration (T), wherein N is at least three;
- means for utilizing Higher Order Statistics (HOS) to calculate a correlation function (c) between the received signals using one of the received signals (s0) as a reference, wherein the correlation function results form volumes of probabilities in a subset of an N−1-dimensional space of information regarding the location of the emitter, wherein each correlation function result in the subset corresponds to a single point in physical space.
Dependencies are inferred from the claim text.