Positioning device, electronic instrument, and storage...

Details Positioning device, electronic instrument, and storage... Positioning device, electronic instrument, and storage...

2009-06-29

2010-11-23

Tarcza, Thomas H (Department: 3662)

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

Directive

Including a satellite

C375S149000

Reexamination Certificate

active

07839328

ABSTRACT:
Signals output from two filters included in a filter section70and differing in passband are respectively stored in different memories included in a memory section80, and a positioning process is performed based on the signal stored in the memory. Specifically, the signal strength of a received signal is calculated by a coherent accumulation process and an incoherent accumulation process, and a signal system used for positioning is alternatively switched to a high-sensitivity system S1or a high-accuracy system S2as a result of determining whether or not the signal strength is equal to or greater than a threshold value.

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