GPS receiver having power management

Details GPS receiver having power management GPS receiver having power management

1996-03-08

2000-10-17

Issing, Gregory C.

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

Directive

Including a satellite

455343, 713330, G01S 502, H04B 116

Patent

active

061338710

ABSTRACT:
A GPS receiver having a low power mode of operation in one embodiment includes an antenna which receives GPS signals at an RF frequency from in view satellites; a downconverter coupled to the antenna for reducing the RF frequency of the received GPS signals to an intermediate frequency (IF); a digitizer coupled to the downconverter and sampling the IF GPS signals at a predetermined rate to produce sampled IF GPS signals; a memory coupled to the digitizer storing the sampled IF GPS signals; and a digital signal processor (DSP) coupled to the memory and operating under stored instructions thereby performing operations on the sampled IF GPS signals to provide pseudorange information. In one example, after the sampled IF GPS signals have been stored in the memory, the GPS receiver front end is powered down and the DSP is powered up. The GPS receiver in one embodiment also includes other power management features.

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