PATENT CLAIM ANALYSIS

Application Number: 15766035
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["375", "267000"]

Abstract:
In a wireless communications system, a base station includes a first number of antennas and a smaller second number of radio frequency links. A base station apparatus includes: a rough arrival angle estimation unit, which estimates a rough arrival angle pair by a second number of antennas and a second number of radio frequency links; a candidate arrival angle estimation unit, which determines a candidate arrival angle pair based on a rough arrival angle pair and beam widths determined by a first number and a second number of antennas, respectively; and a precise arrival angle determination unit, which calculates the difference between the projection component and real component for the candidate arrival angle pairs based on a training tone from the user equipment, and designates the candidate arrival angle pair with the smallest difference between those components as the precise arrival angle pair.

Claim (Index 12):
A method on a base station side in a wireless communication system, wherein the base station is provided with a first number of antennas and a second number of radio frequency chains, the second number being smaller than the first number, the method comprising:\n estimating a pair of coarse arrival angles in a horizontal domain and a vertical domain based on the second number of antennas selected from the first number of antennas and the second number of radio frequency chains; determining pairs of candidate arrival angles in the horizontal domain and the vertical domain based on the estimated pair of coarse arrival angles and beam widths in the horizontal domain and the vertical domain determined based on the first number of antennas and the second number of antennas respectively; and calculating, according to a training signal from user equipment, a difference between a projection component and a real component for each of the pairs of candidate arrival angles, and determining the pair of candidate arrival angles with a minimum calculated difference as a pair of accurate arrival angles in the horizontal domain and the vertical domain for the user equipment, wherein the projection component is determined by projecting an actual received signal for the training signal of the base station onto a steering vector defined based on each of the pairs of candidate arrival angles, and the real component is determined based on the training signal and a status parameter of a channel between the base station and the user equipment.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 91.0
- Lexical Diversity: 2.44444
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14407897', '14779925', '15810588', '14404335', '15306741']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4955654074034508
- 35 USC 102 Novelty (BERT): 0.495635387866243
- Combined Prediction Score: 0.49557240544973
- Mean Citation Score: 242.11384200000003
- Max Citation Score: 249.43054
- Similarity Product: 185.3731804839313

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