System for direction determination

Details System for direction determination System for direction determination

1997-11-14

1999-11-23

Hellner, Mark

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342444, G01S 502

Patent

active

059908335

ABSTRACT:
System for determining the position of radar transmitters where the system includes at least one information center with associated cells and means of communication between the information center and the cells with a restricted transfer rate utilising existing infrastructure in the country, such as for example a national telephone network and also mobile telephone networks and their base stations. Each cell includes at least one sensor in order to be able to detect radar signals. Leading edges of pulses in the radar signals are detected and time-marked after which they are sorted according to PRI (Pulse Repetition Interval). The time of arrival for the first pulse in a pulse train is calculated and data reduced by modulo calculation to a value that as a maximum is the propagation time difference for pulses between two cells in a pair of cells/sensors that are used together for calculating the bearing. Bearings calculated from at least two pairs of cells are correlated in the information center which thereafter calculates the position of the radar transmitter.

REFERENCES:
patent: 3878381 (1975-04-01), Broder et al.
patent: 4209835 (1980-06-01), Guadagnolo
patent: 5045860 (1991-09-01), Hodson
patent: 5285209 (1994-02-01), Sharpin et al.
patent: 5396250 (1995-03-01), Tsui et al.
patent: 5477227 (1995-12-01), Noneman
patent: 5512908 (1996-04-01), Herrick

Affiliated with

Also associated with

Rating

System for direction determination does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for direction determination, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for direction determination will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1226766