Low power RF receiver with redistribution of synchronisation...

Details Low power RF receiver with redistribution of synchronisation... Low power RF receiver with redistribution of synchronisation...

2005-06-28

2005-06-28

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C340S426190, C342S357490, C342S357490, C342S357490

Reexamination Certificate

active

06912242

ABSTRACT:
A low power RF receiver (1) has an antenna (2), a reception and shaping stage (3) for the radio-frequency signals provided by the antenna, a12-channel correlation stage (7) receiving intermediate signals (IF) shaped by the reception stage (3), and a microprocessor (12) connected to the correlation stage for calculating X, Y and Z position, velocity and time data as a function of data provided by the radio-frequency signals, such as GPS signals, transmitted by satellites. Each channel includes a correlator (8) associated with a controller (9), which also includes a digital signal processing algorithm to allow all the synchronisation tasks for acquiring and tracking a satellite to be performed autonomously when the channel (7′) is set in operation, and to lock onto the satellite. Buffer registers (11) are placed at the interface between the correlation stage (7) and the microprocessor (12) for the mutual transfer of data. The low power RF receiver may be mounted in the case of a watch and powered by the energy accumulator or battery of the watch.

REFERENCES:
patent: 6018704 (2000-01-01), Kohli et al.
patent: 6028887 (2000-02-01), Harrison et al.
patent: 6151353 (2000-11-01), Harrison et al.
patent: 6278403 (2001-08-01), Peng et al.
patent: 6366606 (2002-04-01), Sriram
patent: 6480150 (2002-11-01), Falk et al.
patent: 2001/0048388 (2001-12-01), Falk et al.
patent: 99/63360 (1999-12-01), None

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