PATENT CLAIM ANALYSIS

Application Number: 16079508
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-02
Patent Classification: ["375", "267000"]

Abstract:
In receiving radio waves from a transmitter by an array antenna, and estimating an arrival direction of a direct wave, delay times of the arriving waves are estimated ( 13 ) by means of a super-resolution process based on transmission channel estimation results, an arriving wave component corresponding to the delay time having been determined to be equal to or longer than a threshold value is removed ( 15 ) from the transmission channel estimation results, arriving wave components after the removal are separated from each other to extract direct wave components ( 17 ), and an arrival angle is estimated ( 19 ). The arrival direction of the direct wave can be accurately estimated in an environment where delayed waves of short delay times are present. Also, the amount of calculation is small even when the super-resolution process is performed.

Claim (Index 9):
A receiving method in which radio waves transmitted from a transmitter are received, and an arrival angle of the direct wave from the transmitter is estimated, said method comprising:\n a wireless reception step of performing frequency conversion and AD conversion on first to N-th analog signals obtained by receiving the radio waves by first to N-th (N being an integer not smaller than 2) antenna elements forming an array antenna, to generate first to N-th digital signals; a transmission channel estimation step of estimating transmission channel frequency characteristics based on the first to N-th digital signals, to output first to N-th transmission channel estimation results; a delay time estimation step of estimating, by means of a super-resolution process, delay times of one or more arriving waves included in the radio waves, based on a transmission channel estimation result among the first to N-th transmission channel estimation results; a delay time grouping step of comparing the delay times estimated in said delay time estimation step with a threshold value, to determine whether the estimated delay times are shorter than the threshold value; a delayed wave removal step of removing, from the first to N-th transmission channel estimation results, an arriving wave component corresponding to the delay time having been determined to be equal to or longer than the threshold value in the delay time grouping step, and outputting first to N-th transmission channel frequency characteristics pertaining to the arriving waves of the delay times having been determined to be shorter than the threshold value in the delay time grouping step; an arriving wave separation step of separating, from each other, arriving wave components included in the first to N-th transmission channel frequency characteristics, to extract first to N-th direct wave components; and an arrival angle estimation step of estimating an arrival angle of the direct wave based on a phase difference among the first to N-th direct wave components.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 96.0
- Lexical Diversity: 1.85185
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10492351', '10859964', '09720700', '12992253', '11387966']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4401340893759464
- 35 USC 102 Novelty (BERT): 0.4907953812729308
- Combined Prediction Score: 0.4452002185656449
- Mean Citation Score: 216.584014
- Max Citation Score: 231.02383
- Similarity Product: 185.66910838486672

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test