Nova Patents
EP1512985A2

Combined navigation satellite receiver/communications device

Abstract

A combination of a navigation satellite receiver and a communication device exchanges precise synthesized frequencies and clocks between the navigation satellite receiver and the communication device. In one embodiment, a TCXO crystal serves as a reference for the navigation satellite receiver and locking onto the satellite transmissions allows highly accurate frequency synthesis and clock generation by it for the communication device. In another embodiment, a VCO primarily affiliated with the communication device serves as a basic reference for the navigation satellite receiver, and subsequent locking onto the satellite transmissions again allows highly accurate frequency synthesis and clock generation for the communication device. In a further embodiment, a VCO primarily affiliated with the communication device serves as a basic reference for the navigation satellite receiver after it locks onto the communications systems standards. The navigation satellite receiver therefore has reduced clock uncertainty and can initialize and track satellites much faster than otherwise.

EP1512985A2, drawing sheet 1
Sheet 1 of 4

Term

Term ended

Projected expiry passed 24 August 2024, 2.1 years ago.

  1. Priority
  2. Filed
  3. Published
  4. Projected expiry
  5. Today

11 claims: 2 independent, 9 dependent

  1. 1
    A combination device, comprising:a navigation receiver;a communications device integrated with the navigation receiver;and a single crystal oscillator providing a reference frequency for RF-tuning, down conversion, and signal demodulation in both the navigation receiver and communications device;wherein, other and separate crystal oscillators are not required by the navigation receiver and communications device.
  2. 10
    A combination mobile device, comprising:a mobile navigation receiver;a mobile communications device integrated with the navigation receiver;a single crystal oscillator providing a reference frequency for RF-tuning, down conversion, and signal demodulation in both the navigation receiver and communications device, wherein, other and separate crystal oscillators are not required by the navigation receiver and communications device;and a frequency divider connected to the navigation receiver for supplying a relatively improved derivative of said reference crystal frequency to the communications device for increased economy and performance over that of using a separate independent communications VCO crystal.
Independent claims2