PATENT CLAIM ANALYSIS

Application Number: 16027785
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2018-11
Patent Classification: ["375", "260000"]

Abstract:
A technique is provided for estimating time of arrival of a signal transmitted as a pulse and received as a sum of pulses. The received signal is filtered with a novel filter that lowers the early side lobes of the received signal to noise level. A first energy rise point is identified at a point of the main lobe of the filtered received signal, at which the energy is higher than the noise by a predetermined level. Starting from the identification of the first energy rise points, the time of arrival is estimated via curve matching, in which the shape of the filtered received signal is matched to the shape of a reference curve composed by a sum of one or more reference curves that are shifted both in time and in energy. The reference curves are found by applying to the transmitted signal the same filter applied to the received signal.

Claim (Index 9):
The method of  claim 8 , wherein the best match is one of:\n a) a point at which a minimal least squares error between a shape of the first waveform and a shape of a corresponding section of the reference waveform is found; b) a point at which a least squares error between the shape of the first waveform and a shape of a corresponding section of the reference waveform is below a first predetermined threshold and an energy of the point is above a second pre-determined threshold with respect to the estimated noise; c) a point at which a minimal weighted least squares error between a shape of the first waveform and a shape of a corresponding section of the reference waveform is found, the minimal weighted least squares error being expressed as min a , t 1 \ue89e ( Y \u2032 - a 1 \ue89e X \u2032 \ue8a0 ( t 1 ) ) H \ue89e C - 1 \ue8a0 ( Y \u2032 - a 1 \ue89e X \u2032 \ue8a0 ( t 1 ) ) Y \u2032 = a 1 \ue89e X 1 \u2032 + N \u2032 where Y\u2032 and X\u2032(t 1 ) are the complex vectors containing the 2 or N consecutive points, respectively taken from the first waveform and from the reference waveform, a 1  is a complex scalar and t 1  is a time shift of the reference waveform, X\u2032 1  is a complex vector corresponding to a waveform of first pulse to be received, C is the noise covariance matrix of the 2 or N point noise vector N\u2032 from the general model of signal plus noise and N\u2032 is the noise left after subtracting a waveform of the first arriving pulse (first path) from Y\u2032; or d) a point at which a weighted least squares error is below a predetermined error between the shape of the first waveform and a shape of a corresponding section of the reference waveform and an energy of the point is above a second pre-determined threshold with respect to the estimated noise.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 95.0
- Lexical Diversity: 2.25352
- Patent Class: 375.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['14626734', '14433686', '11268410', '14593920', '12736939']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4901015651998394
- 35 USC 102 Novelty (BERT): 0.5524072466996046
- Combined Prediction Score: 0.4963321333498159
- Mean Citation Score: 231.269778
- Max Citation Score: 434.37555
- Similarity Product: 299.01267208583056

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test