EP 1021733 A1 20000726 - MONITORING METHOD AND APPARATUS
Title (en)
MONITORING METHOD AND APPARATUS
Title (de)
ÜBERWACHUNGSVERFAHREN UND -GERÄT
Title (fr)
PROCEDE ET APPAREIL DE SURVEILLANCE
Publication
Application
Priority
- IL 9800376 W 19980813
- IL 12193297 A 19971009
Abstract (en)
[origin: WO9919742A1] A combined portable monitoring, tracking and searching system, comprising one or more monitored and/or searched units (MSU) and one or more monitoring and searching units (SRU), wherein the MSU comprises processing means, memory means, display and/or audio means, a transmitting/receiving antenna, a spread spectrum receiver to receive modulated spread spectrum data and to convert it to baseband data, a spread spectrum transmitter, a data spreader, a synthesizer or frequency generator, and a correlator to correlate spread spectrum data received by said spread spectrum receiver with a known Pseudo Noise (PN) sequence; and, the SRU comprises processing means, memory means display and/or audio means, a transmitting/receiving omnidirectional antenna, a transmitting/receiving directional antenna, a spread spectrum receiver to receive modulated spread spectrum data and to convert it to baseband data, a spread spectrum transmitter, a data spreader, a synthesizer unit or frequency generator, a correlator to correlate spread spectrum data received by said spread spectrum receiver with a known PN sequence, and delay measurement means, to measure the time elapsed from the beginning of a first transmitted sequence to the beginning of one or more of the sequences received from a MSU in response to said first transmitted sequence.
IPC 1-7
IPC 8 full level
G01C 21/00 (2006.01); G01S 1/04 (2006.01); G01S 5/12 (2006.01); G01S 5/14 (2006.01); G01S 13/86 (2006.01); H04Q 7/34 (2006.01); H04W 64/00 (2009.01)
CPC (source: EP)
G01S 1/045 (2013.01); G01S 5/12 (2013.01); G01S 13/86 (2013.01)
Citation (search report)
See references of WO 9919742A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9919742 A1 19990422; AU 8644598 A 19990503; CA 2303074 A1 19990422; CN 1277676 A 20001220; EP 1021733 A1 20000726; IL 121932 A0 19980310; IL 121932 A 20000601; JP 2001520387 A 20011030
DOCDB simple family (application)
IL 9800376 W 19980813; AU 8644598 A 19980813; CA 2303074 A 19980813; CN 98810056 A 19980813; EP 98937749 A 19980813; IL 12193297 A 19971009; JP 2000516240 A 19980813