Journal ArticleDOI
Time delay techniques for satellite interference location system
W.W. Smith,Paul G. Steffes +1 more
TLDR
The development of a system for inferring the position of uplink ground stations, using existing domestic satellites, with minimal disruption of normal operation, using the differential time delay of a single uplink signal passing through two adjacent spacecraft.Abstract:
Describes the development of a system for inferring the position of uplink ground stations, using existing domestic satellites, with minimal disruption of normal operation. The system uses the differential time delay of a single uplink signal passing through two adjacent spacecraft to infer the relative position of the uplink transmitter. A system for the measurement of such differential time delays is described. Since this technique alone does not provide an unambiguous determination of uplink transmitter location, the use of an interferometer to resolve such ambiguities is discussed. >read more
Citations
More filters
Journal ArticleDOI
An accurate algebraic solution for moving source location using TDOA and FDOA measurements
TL;DR: The estimated accuracy of the source position and velocity is shown to achieve the Crame/spl acute/r-Rao lower bound for Gaussian TDOA and FDOA noise at moderate noise level before the thresholding effect occurs.
Journal ArticleDOI
Source Localization Using TDOA and FDOA Measurements in the Presence of Receiver Location Errors: Analysis and Solution
TL;DR: A solution is proposed that takes the receiver error into account to reduce the estimation error, and it is shown analytically, under some mild approximations, to achieve the CRLB accuracy for far-field sources.
Journal ArticleDOI
Solution and performance analysis of geolocation by TDOA
K.C. Ho,Yiu-Tong Chan +1 more
TL;DR: In this paper, a method of geolocation is based on measuring the time difference of arrivals (TDOAs) of a signal received by three or four geostationary satellites.
Journal ArticleDOI
Geolocation of a known altitude object from TDOA and FDOA measurements
K.C. Ho,Yiu-Tong Chan +1 more
TL;DR: In this paper, two sets of geolocation solutions are proposed which exploit the altitude constraint to improve the localization accuracy, one is for TDOAs alone and the other for the combination of TDOA and frequency difference of arrival (FDOA) measurements.
Journal ArticleDOI
On wavelet denoising and its applications to time delay estimation
TL;DR: It is proved that the proposed method achieves global convergence with a high probability and performs significantly better than both the generalized cross correlator (GCC) and the direct cross correlators (CC).
References
More filters
Journal ArticleDOI
Emitter Location Accuracy Using TDOA and Differential Doppler
TL;DR: In this article, two methods for locating a radio or sonar transmitter are briefly described: time difference of arrival (TDOA) and d differential Doppler (DDOA).