Effective time-of-arrival estimation algorithm for multipath environment
First Claim
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1. A method, comprising:
- using multipath decomposition to determine time-of-arrival in a radio device without synchronized hardware.
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Abstract
An algorithm identifies a line-of-sight (LOS) signal that may be used to provide an effective time-of-arrival (TOA) estimation.
31 Citations
24 Claims
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1. A method, comprising:
using multipath decomposition to determine time-of-arrival in a radio device without synchronized hardware. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
sequentially estimating a dominant multipath component to achieve a time-of-arrival estimation of a received signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method, comprising:
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determining an initial timing acquisition based on a received signal;
providing a frequency offset compensation to correct a frequency offset between the received signal and a reference signal;
decomposing the received signal into components associated with various paths;
determining the number of paths in the received signal; and
selecting one of the number of paths as a line-of-sight signal. - View Dependent Claims (16, 17, 18)
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19. A method of determining distance in a radio device, comprising:
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receiving a modulated signal in a multi-antenna receiver that is converted to a received signal;
using the received signal in a processor to decompose multipaths based on an energy ratio of a signal component and a noise component (ESNR). - View Dependent Claims (20, 21, 22, 23, 24)
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Specification