PHASE DIFFERENTIAL RANGE-FINDING METHOD FOR DETERMINING COORDINATES OF RADIO-RADIATION SOURCES WITH PROGRAM ADJUSTMENT OF WORKING FREQUENCY Russian patent published in 2006 - IPC G01S13/00 

FIELD: radio engineering, possible use for high frequency determining of coordinates of radio radiation sources.

SUBSTANCE: phase differential range-finding method for determining coordinates of radio-radiation sources with program adjustment of working frequency includes receiving, selecting and demodulating by M distanced stations for receipt and processing by means of radio-receiving devices, adjusted for N signal frequencies from J radio radiation sources, relay of transformed signals through narrowband communication channels with frequency selection to central processing station, calculation of temporal beam drive differences and, on basis of the latter, - coordinates of radio radiation sources. At each station for receipt and processing, duration of each received signal to be selected is measured, and all signals having duration greater than duration, acceptable for network with program adjustment of working frequency, are excluded from further processing. Then, bearing frequency is measured, as well as power, bandwidth and arrival time of each signal, and also power of noise. All these measured values are transferred along narrowband communication channels to central processing station, where for i, j pair of modulated signals appropriate for b-numbered frequency and positioned in 1st time range, error of measurement of temporal difference of beams drive is estimated. Further, data are excluded for computations, for which estimated error is greater than range of unambiguous measurement, value of temporal delays is determined. Then number of stations β is determined, phase difference ϕ^h _ije(i≠j), difference of phase differences ϕ^h _ije-ϕ^p _ijm(n≠p), precise difference of beam drive R_ij and precise coordinates of radio radiation sources.

EFFECT: increased precision.

2 cl, 3 dwg