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Repeater identification in a position determination system

A technology of repeater and signal identification, applied in radio wave measurement systems, instruments, positioning, etc., can solve problems such as position estimation errors

Inactive Publication Date: 2006-04-05
QUALCOMM INC
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Problems solved by technology

Therefore, position estimates based on this time measurement will be wrong

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  • Repeater identification in a position determination system
  • Repeater identification in a position determination system
  • Repeater identification in a position determination system

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[0029] As used herein, terms such as "about," "approximately," "substantially," and "approximately" are intended to allow for some error in mechanical precision to account for industry-accepted tolerances. Accordingly, any deviation from the value modified by the terms "about", "approximately", "substantially", "approximately" within the range of 1% to 20% or less up or down shall be considered significantly within the stated value.

[0030] As used herein, the term "software" includes: source code, assembly language code, binary code, firmware, macro-instructions, micro-instructions, etc., or any combination of two or more of the above.

[0031] The term "memory" refers to any processor-readable medium, including (but not limited to) Random Access Memory (RAM), Read Only Memory (ROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory ( PROM), erasable programmable read-only memory (EEPROM), magnetic disk, floppy disk, hard disk, compact disk read-o...

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Abstract

A method of identifying whether a first signal received at a subscriber station has been relayed by a repeater. The method involves measuring at the subscriber station a time difference of arrival between the first signal and a second signal. A hyperboloid or other potential solution surface is then formed from the measured time difference of arrival. A determination is then made whether or not the first signal was relayed by a repeater based on information derived from the potential solution surface.

Description

[0001] Related applications [0002] This application claims priority to US Provisional Application Serial No. 60 / 452,214, filed March 3,2003. technical field [0003] The present invention relates to the fields of position determination and wireless communication, and more particularly, the present invention relates to position determination in wireless communication systems using repeaters. Background technique [0004] Repeaters are a flexible and economical way to extend coverage or fill coverage gaps in a wireless communication system. Repeaters can also be used to provide a specific pilot dominant within the coverage area of ​​a CDMA (Code Division Multiple Access) system subject to many pilots. Areas that typically show repeaters useful for increasing or extending coverage are changing terrain such as valleys, tunnels, and office buildings. For a fraction of the cost of a full base station, repeaters are suitable for use in new as well as well-established, mature ne...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04W64/00G01S5/02
Inventor 萨米尔·S·苏莱曼
Owner QUALCOMM INC
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