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US 8,553,823 B2Granted
Method for identifying signals of the same origin
AssigneeSiemens Convergence Creators GmbH
InventorWolfgang Tschirk
Life of this patent
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Abstract
A method for identifying signals of the same origin is described. The signals are identified based upon a method of system analysis, wherein an accumulated value of an attenuation weighted by power of an incoming channel, the so-called correspondence coefficient, is used as the criterion whether two signals are of the same origin.
Claims15
A method of identifying signals of a same origin, based on a method of system analysis, comprising:
- supplying a first signal to an input of a digital filter resulting in an filter output signal;
- providing a second signal;
- forming a difference signal based upon the filter output signal of the digital filter and the second signal;
- adapting a transfer function of the digital filter by using the difference signal such that the difference signal is minimized;
- calculating an attenuation value from power values of the difference signal and the second signal using the equation
- R
- =
- 10
-
- log
- 10
-
- P
-
- (
- Y
- )
- P
-
- (
- D
- )
- ,
- wherein R is the attenuation value, P(Y) is a sum of squares of amplitudes over a certain time period relating to the second signal and P(D) is a sum of squares of amplitudes over a certain time period relating to the difference signal;
- calculating a correspondence coefficient from the attenuation value and the power value of the second signal using the equation
- C
-
- (
- T
- )
- =
- ∑
- t
- =
- 1
- T
-
- P
- α
-
- (
- Y
- )
- t
-
- R
- t
- ∑
- t
- =
- 1
- T
-
- P
- α
-
- (
- Y
- )
- t
- ,
- wherein C(T) is the correspondence coefficient being used as a measure for identifying a common origin of the first and second signals, wherein t represents a point in time of iteration, measured in sampling intervals, starting with a start of the system analysis, and wherein α (alpha) represents a value to be chosen within the range from 1 to 3.
59 more elements
Dependencies are inferred from the claim text.