PATENT CLAIM ANALYSIS

Application Number: 16009416
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2019-01
Patent Classification: ["375", "262000"]

Abstract:
The present application relates to a technique for reducing the circuit scale of a testing device having a function of performing a fading process with respect to a propagation channel of S×U channels assumed between transmitting and receiving antennas, using a terminal compatible with MIMO for transmitting a downlink signal from a base station to a mobile terminal with the number of base station-side antennas S and the number of terminal-side antennas U, or a circuit substrate, an integrated circuit and the like built into the terminal, as a test object. The multiplication arithmetic operation of the characteristics of the propagation channel and the modulation signal is performed in the frequency domain, and a time domain signal is generated from the arithmetic operation result. It's possible to considerably reduce the scale of a circuit that performs inverse Fourier transform and the scale of a circuit that generates propagation channel characteristics.

Claim (Index 6):
A method for testing a MIMO scheme system adopting a multicarrier modulation scheme using K carriers, a MIMO scheme using S transmitting antennas and U receiving antennas, and a beam forming process scheme for setting radiation beam characteristics based on the S transmitting antennas, in which assumption of a pseudo propagation channel that spans the range from S transmitting antennas to the U test objet receiving antennas through a propagation environment including N scatters is made, and generating incident waves to be fed into the U receiving antennas through the propagation channel and giving the incident waves to the test object through U\u2032 probe antennas in an anechoic chamber, the method comprising:\n a step of generating R\u00d7K series of modulation signals in the frequency domain for each of the K carriers with the input of R layers' worth of data signal sequences to be transmitted to the test object; \n a step of obtaining characteristics of a propagation channel taking account of beam forming characteristics, by multiplications of S\u00d7R series of beam forming characteristics, whose size is specified by number of the transmitting antennas and the number of layers, and characteristics simulating a propagation channel through which a signal transmitted from the transmitting antenna is output as M rays per scatter according to the characteristics of the transmitting antenna and arrives at the corresponding scatter; \n a step of obtaining characteristics of a propagation channel taking account of a movement of the test object by multiplications of the characteristics of the propagation channel taking account of beam forming characteristics and phase characteristics for giving a Doppler frequency shift due to the movement of the test object; \n a step of grouping the rays into one unit that may be regarded as having the same arrival direction of radio waves viewed from the test object among the characteristics of the propagation channel taking account of a movement of the test object and performing Fourier transform processes on characteristics of propagation channels of L units with different arrival directions to obtain characteristics of propagation channel in the frequency domain at every carrier frequency; \n a step of generating L series of propagation signals per carrier in the frequency domain via a pseudo propagation channel from the plurality of transmitting antennas to incident channels of the plurality of receiving antennas of the test object by multiplications of the characteristics of the propagation channel in the frequency domain at every carrier frequency and the generated R\u00d7K series modulation signals; \n a step of performing an extraction process of L series of propagation signals per carrier by performing a convolution arithmetic operation of the frequency characteristic of the window function with the propagation signal of the L series per carrier, as a process in the frequency domain corresponding to the signal extraction by multiplications of a window function rotating at a Doppler frequency corresponding to each series; \n a step of generating U\u2032 series of propagation signals per carrier by weighting and combining process of signals of L units for each of the probe antennas with the input of the propagation signals extracted by the convolution arithmetic operation of the frequency characteristics of the window function; \n a step of generating signals in the time domain for outputting from the probe antennas by performing inverse Fourier transform processes with the input of the arithmetic operation results of the weighting process; and \n a step of generating consecutive incident waves to be output from the probe antennas and to be radiated on the test object by shifting as much as a length of the window function and adding the generated signals in the time domain.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 94.0
- Lexical Diversity: 1.91566
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15810833', '12848043', '14068826', '11898711', '12673340']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.428038568123832
- 35 USC 102 Novelty (BERT): 0.5476450561404411
- Combined Prediction Score: 0.439999216925493
- Mean Citation Score: 237.508304
- Max Citation Score: 389.9384
- Similarity Product: 338.69024869570734

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