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Control of power consumption in satellite positioning systems

A satellite positioning system and power control technology, applied in satellite radio beacon positioning systems, transmission systems, digital transmission systems, etc., and can solve problems such as high average power and RF chip consumption

Inactive Publication Date: 2006-11-08
SIRF TECHONOLOGY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the RF chip consumes more average power than necessary
Specifically, excessive power consumption is a significant drawback when incorporated into devices with limited power reserves, such as battery-operated GPS receivers

Method used

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  • Control of power consumption in satellite positioning systems
  • Control of power consumption in satellite positioning systems
  • Control of power consumption in satellite positioning systems

Examples

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Embodiment Construction

[0021] A typical Satellite Positioning System ("SPS") system has approximately 12 satellites visible to the wireless device at any one time. As used in this document, SPS means any system that utilizes satellites and / or terrestrial communications equipment to provide or allow determination of the location of wireless devices on Earth, including but not limited to: Global Positioning System (“GPS”) ) (such as NAVSTAR), GLONASS, LORAN, Shoran, Decca, or TACAN. For purposes of discussion, a specific example of the interface between the GPS RF processing section and the baseband processing section is described. In general, however, the principles underlying the interface can be applied to interface RF processing and baseband processing sections.

[0022] First, go to figure 2 , which shows a receiver 200 of a satellite positioning system. Receiver 200 includes RF processing section 202 coupled to baseband processing section 204 using RF to baseband interface 206 . The RF proce...

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PUM

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Abstract

An interface between an RF processing section and a baseband processing section supports general purpose message transmission as well as satellite positioning system signal sample transmission between the RF processing section and the baseband processing section. The interface includes a bi-directional message interface and a data interface. The message interface supports transmission of power control messages to the RF processing section to provide detailed control over activation or de-activation of individual blocks of hardware circuitry in the RF processing section.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Application Serial No. 10 / 632,051, filed July 30, 2003, entitled "Serial Radio Frequency onBaseband with Power Control," which was filed February 19, 2003, and entitled " A continuation-in-part of U.S. Patent Application Serial No. 10 / 369,853 for Serial Radio Frequency to Baseband Interface with Programmable Clock. technical field [0003] This invention relates to an interface for coupling a radio frequency (RF) processing section to a baseband processing section. More specifically, this invention relates to passing power control messages from the baseband section to the RF section. Background technique [0004] Such as two-way radios, pagers, portable televisions, personal communication systems ("PCS"), personal digital assistants ("PDAs"), cellular telephones (also known as "mobile phones"), Bluetooth devices, satellite radio receivers and The widespread use of wireless dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/00H04B1/16H04L12/56
CPCG01S19/34H04B1/16H04W88/02H04B1/06H04B10/293H04W52/028H04W52/0225
Inventor 罗伯特·特索史蒂夫·格罗尼迈耶
Owner SIRF TECHONOLOGY INC