Title:
METHOD FOR MEASURING THE TIME OF ARRIVAL OF RADIO SIGNALS
Document Type and Number:
WIPO Patent Application WO/2010/014315
Kind Code:
A3
Abstract:
A method for measuring the time of arrival of radio signals within a network comprises receiving the received signals including at least a first pseudorandom code and a second pseudorandom code from at least one other node; identifying a frequency difference between the node and the other node using a phase difference between each of a maximum value of a cross-correlation provided by the first pseudorandom code and the second pseudorandom code; applying the frequency difference to the reception of the received signal; and calculating the time of arrival of the received signal comprising a time, measured with a local clock, when the cross-correlation has achieved the maximum value.
Inventors:
BELCEA JOHN M (US)
ALAPURANEN PERTTI O (US)
ALAPURANEN PERTTI O (US)
Application Number:
PCT/US2009/048541
Publication Date:
March 25, 2010
Filing Date:
June 25, 2009
Export Citation:
Assignee:
MOTOROLA INC (US)
BELCEA JOHN M (US)
ALAPURANEN PERTTI O (US)
BELCEA JOHN M (US)
ALAPURANEN PERTTI O (US)
International Classes:
G01S3/808; G01S5/02
Foreign References:
| US7295159B1 | 2007-11-13 | |||
| US20020118723A1 | 2002-08-29 | |||
| US5371760A | 1994-12-06 | |||
| EP1464981A2 | 2004-10-06 |
Attorney, Agent or Firm:
KARPINIA, Randi, L. et al. (Schaumburg, IL, US)
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