Effective time-of-arrival estimation algorithm for multipath environment
First Claim
Patent Images
1. A method, comprising:
- using multipath decomposition to determine time-of-arrival in a radio device without synchronized hardware;
estimating a signal having a strongest noise component (ESNR) in the multipath decomposition; and
removing the signal having the strongest ESNR from residual signals.
3 Assignments
0 Petitions
Accused Products
Abstract
An algorithm identifies a line-of-sight (LOS) signal that may be used to provide an effective time-of-arrival (TOA) estimation.
26 Citations
20 Claims
-
1. A method, comprising:
-
using multipath decomposition to determine time-of-arrival in a radio device without synchronized hardware; estimating a signal having a strongest noise component (ESNR) in the multipath decomposition; and removing the signal having the strongest ESNR from residual signals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method, comprising:
-
sequentially estimating a dominant multipath component to achieve a time-of-arrival estimation of a received signal; using multipath decomposition to estimate multipaths based on an energy ratio of a signal component and a noise component (ESNR); and arranging signal components from a strongest ESNR to a weakest ESNR. - View Dependent Claims (9, 10, 11, 12, 15)
-
-
13. A method, comprising:
-
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 by using multipath decomposition to estimate multipaths based on an energy ratio of a signal component and a noise component (ESNR) and arranging signal components from a strongest ESNR to a weakest ESNR; 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 (14)
-
-
16. A method of determining distance in a radio device, comprising:
-
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); arranging components from a strongest ESNR to a weakest ESNR; and removing component with the strongest ESNR from residual signals. - View Dependent Claims (17, 18, 19, 20)
-
Specification