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 1):
A receiving apparatus for receiving radio waves transmitted from a transmitter, and estimating an arrival angle of a direct wave from the transmitter, comprising:\n first to N-th (N being an integer not less than 2) wireless reception units provided respectively corresponding to first to N-th antenna elements forming an array antenna, and performing frequency conversion and AD conversion on first to N-th analog signals obtained by receiving the radio waves by said first to N-th antenna elements, respectively, to output first to N-th digital signals; first to N-th transmission channel estimation units for estimating transmission channel frequency characteristics based on the first to N-th digital signals, respectively, and outputting first to N-th transmission channel estimation results; a delay time estimation unit for 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 unit for comparing the delay times estimated by said delay time estimation unit with a threshold value, to determine whether the estimated delay times are shorter than the threshold value; first to N-th delayed wave removal units provided respectively corresponding to said first to N-th transmission channel estimation units, removing, from the first to N-th transmission channel estimation results, an arriving wave component corresponding to the delay time which said delay time grouping unit has determined to be equal to or more than the threshold value, and outputting first to N-th transmission channel frequency characteristics pertaining to the arriving waves of the delay times which said delay time grouping unit has determined to be shorter than the threshold value; first to N-th arriving wave separation units provided respectively corresponding to said first to N-th delayed wave removal units, and respectively 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 unit for 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): 0.4387376940514187
- 35 USC 102 Novelty (BERT): 0.4968305370269331
- Combined Prediction Score: 0.4445469783489701
- Mean Citation Score: 216.584014
- Max Citation Score: 231.02383
- Similarity Product: 172.92882526223062

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