05345244 is referenced by 174 patents and cites 3 patents.

Cordless antenna apparatus for determination of the location of an observer and/or of the time of observation by use of a Satellite Positioning System (SPS), such as the Global Positioning System or the Global Orbiting Navigational Satellite System. In each embodiment, the apparatus includes a Smart Antenna device and a display unit, connected by a wireless link. In a first embodiment, the Smart Antenna device includes: an SPS antenna to receive the SPS signals; an SPS signal frequency downconverter; an SPS signal processor to receive antenna output signals and to determine at least one of the present location of the SPS antenna or the time of observation; a transmitter to receive processor output signals and transmit these signals to the display unit; and a power supply. The display unit in the first embodiment includes: a receiver to receive the signals transmitted by the SPS Smart Antenna device transmitter; a display processor to receive output signals from the receiver and to process these signals for display of location or time information; display means to visibly or audibly display the location or time information; and a second power supply. In a second embodiment, the SPS signal processor is moved to the display unit. The transmitter and receiver may be replaced by two transceivers to allow the display unit to transmit messages, such as requests for information, to the SPS Smart Antenna device.

Title
Cordless SPS smart antenna device
Application Number
8/3135
Publication Number
5345244
Application Date
January 12, 1993
Publication Date
September 6, 1994
Inventor
Charles Trimble
Los Altos Hills
CA, US
David R Gildea
Menlo Park
CA, US
Agent
John Schipper
Assignee
Trimble Navigation
CA, US
IPC
H04B 1/38
H04B 7/15
G01S 5/02
View Original Source