GPS receiver having a low power standby mode

Details GPS receiver having a low power standby mode GPS receiver having a low power standby mode

1994-07-18

1997-01-07

Issing, Gregory C.

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

Directive

Including a satellite

364707, 455343, 455231, G01S 502, G06F 100, H04B 116

Patent

active

055921736

ABSTRACT:
A GPS receiver having a normal mode to receive GPS satellite signals and to provide location information, and a low power standby mode. A microprocessor system in the GPS receiver causes the GPS receiver to alternate between the normal mode and the low power standby mode in order to reduce the average power consumption in the GPS receiver. In the normal mode a GPS antenna receives GPS satellite signals, the GPS frequency downconverter converts the frequency of the GPS satellite signals to an intermediate frequency, a digital signal processing system processes the intermediate frequency to provide GPS satellite signal correlation information. The microprocessor system processes the correlation information and provides location information to a user. In the standby mode, the operating power is inhibited in the GPS antenna and the GPS frequency downconverter, the system clock is inhibited in the digital processing system, and the microprocessor clock is inhibited in the microprocessor system.

REFERENCES:
patent: 4449248 (1984-05-01), Leslie et al.
patent: 5101510 (1992-03-01), Duckeck
patent: 5128938 (1992-07-01), Borras
patent: 5291542 (1994-03-01), Kivari et al.
patent: 5418537 (1995-05-01), Bird
patent: 5448773 (1995-09-01), McBurney et al.

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