1
Peter James Duffett Smith, James Paul Brice, Paul Hansen: Radio positioning systems. Cambridge Positioning Systems, Roylance Abrams Berdo & Goodman L, April 15, 2008: US07359719 (85 worldwide citation)

The invention described relates to a radio positioning system primarily for a mobile telephone network, in which a list of offsets in time, phase, frequency, or derivatives thereof, or their equivalents expressed as offsets in distance or derivatives thereof, of a plurality of transmission source si ...


2
Peter James Duffett Smith, James Paul Brice, Paul Hansen: Radio positioning systems. Cambridge Positioning Systems, Roylance Abrams Berdo & Goodman L, March 4, 2003: US06529165 (70 worldwide citation)

The invention concerns a method of determining the position or change in position or state of motion of a receiver or receivers, the position or change in position or state of motion of which is or are not already known, in a network of transmission sources some or all of whose positions are known. ...


3
Peter James Duffett Smith, Malcolm David MacNaughtan, John Christopher Clarke, Robert Willem Rowe: Radio positioning systems. Cambridge Positioning Systems, Roylance Abrams Berdo & Goodman L, May 17, 2005: US06894644 (41 worldwide citation)

The present invention sets out to overcome the hearability problem in CDMA communications networks in which positioning services are provided, by using a separate sampling device (204, 205, 206) for each transmitter (201, 202, 203), which sends to the computing device (208) a representation of the s ...


4
Peter James Duffett Smith, Malcolm David MacNaughtan, Christopher John Clarke, Robert Willem Rowe: Radio positioning systems. Cambridge Positioning Systems, Roylance Abrams Berdo & Goodman L, January 1, 2008: US07315745 (35 worldwide citation)

The invention provides a method of estimating the time offsets between signals transmitted by plural transmitters of a communications network and received by a receiver attached to a terminal. In the method a section of a representation of the signals from the plural transmitters received by the rec ...


5
Peter James Duffett Smith, Malcolm David Macnaughtan, John Christopher Clarke, Robert Willem Rowe: Radio positioning systems. Cambridge Positioning Systems, Roylance Abrams Berdo & Goodman L, March 24, 2009: US07508883 (27 worldwide citation)

The present invention sets out to overcome the hearability problem in CDMA communications networks in which positioning services are provided, by using a separate sampling device 204, 205, 206 for each transmitter 201, 202, 203, which sends to the computing device 208 a representation of the signals ...


6
Duffett Smith Peter J, Macnaughtan Malcolm D, Clarke John C, Rowe Robert W: Radio positioning systems. Cambridge Positioning Sys, January 22, 2003: EP1278074-A1 (4 worldwide citation)

The present invention sets out to overcome the hearability problem in CDMA communications networks in which positioning services are provided, by using a separate sampling device (204,205,206) for each transmitter (201,202,203), which sends to the computing device (208) a representation of the signa ...


7
Brice James Paul, Duffett Smith Peter James, Hansen Paul: Improvements in radio positioning systems. Cambridge Positioning Sys, March 13, 2002: EP1185878-A1 (4 worldwide citation)

The invention concerns a method of determining the position or change in position or state of motion of a receiver or receivers, the position or change in position or state of motion of which is or are not already known, in a network of transmission sources some or all of whose positions are known. ...


8
Brice James Paul, Duffett Smith Peter James, Hansen Paul: Improvements in radio positioning systems. Cambridge Positioning Sys, March 13, 2002: EP1185877-A1 (3 worldwide citation)

The invention concerns a method of determining the position or change in position or state of motion of a receiver or receivers, the position or change in position or state of motion of which is or are not already known, in a network of transmission sources some or all of whose positions are known. ...


9
Duffett Smith Peter James, Macnaughtan Malcolm David, Clarke John Christopher, Rowe Robert Willem: Improvements in radio positioning systems. Cambridge Positioning Systems, February 1, 2005: TWI227644 (3 worldwide citation)

The present invention sets out to overcome the hearability problem in CDMA communications networks in which positioning services are provided, by using a separate sampling device 204, 205, 206 for each transmitter 201, 202, 203, which sends to the computing device 208 a representation of the signals ...


10
Duffett Smith Peter James, Hansen Paul, Brice James Paul: Improvements in radio positioning systems. Cambridge Positioning Systems, May 21, 2002: TW487808 (3 worldwide citation)

The invention described relates to a radio positioning system primarily for a mobile telephone network, in which a list of offsets in time, phase, frequency, or derivatives thereof, or their equivalents expressed as offsets in distance or derivatives thereof, of a plurality of transmission source si ...