| 摘要 |
A system and method for locating a signal source are disclosed. The method utilizes signals S, received during respective time intervals {At1 }from the signal source by a number n of receivers IRcn}, and data about the change {AR} of the receivers' 5 positions {R}. The method includes processing the signals S" from each of the receivers to determine the phase AO,, accumulated in the signal S, during a respective time interval At. Based on the determined accumulated phases {A1 }, the accumulated phases differences AAOmn (differential phase) between the signals, Sm and So, that are received by two or more pairs {m,n} of the receivers are determined. Then, the location 10 of the signal source is determined such that it satisfies that the changes in the positions of the respective {n,m} receivers relative to that location correspond to the differential phases AAOmn between the signals received by the respective receivers. Providing a number of at least two receivers {Rcn}, including 105-1 one or more receivers mounted on moving platforms. Providing data indicative of a signal Sn received by each of the 1101 at least two receiver {Rcn} Applying first processing to each received signal Sn to 120-' determine the phase A9n that is accumulated during certain time interval At of the reception of the signal Sn 122 - Inter-pulse phase 124 - Intra-pulse phase _ accumulation _ _ _ accumulation _ Applying a second processing to determine a differential phase 130-' AAOmn- (0A0n) between the accumulated phases,AOm and AOn, of the signals, Sm and Sn, received by one or more pairs {m,n} of the receivers Rcm and Rcn Providing position data indicative of positions of the at least 140 two receivers Applying a third processing to determine the location of the 150 signal source based on the differential phase AAOmnbetween the accumulated phases, AOmand Ain , of the pairs {m,n} of receivers and their respective positions. Optionally further utilizing multilateration (i.e. differential time 160< of arrival technique) in said third processing to thereby enable, I determination of the location of the signal source with reduced number of receivers L-i A------------------------ Fig. IA |
