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 5):
A method for testing a MIMO scheme system, in a 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 S transmitting antennas, in which assumption of a pseudo propagation channel that spans the range from S transmitting antennas to U receiving antennas of the test object through a propagation environment including N scatters is made, and generating receiving signals to be received through the U receiving antennas through the propagation channel and giving the receiving signals to the test object, 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; 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 the number of 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; 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 receiving antenna and the test object; a step of obtaining characteristics of a propagation channel taking account of receiving characteristics of the receiving antennas by multiplications of the characteristics of the propagation channel taking account of the movement of the test object and the receiving antenna characteristics indicating the receiving characteristics of the receiving antennas; a step of grouping the rays into one unit that may be regarded as having a common Doppler frequency shift for each of the receiving antennas among arithmetic operation results of the characteristics of the propagation channel taking account of receiving characteristics of the receiving antennas and performing Fourier transform processes on characteristics of propagation channels of L units with different Doppler frequencies to obtain characteristics of propagation channel in the frequency domain at every carrier frequency; a step of generating U\u00d7L series of propagation signals per carrier in the frequency domain passing through a pseudo propagation channel from the transmitting antennas to the receiving antennas by multiplications of the characteristics of the propagation channel in the frequency domain at every carrier frequency and a generated R\u00d7K\u2032 series worth of modulated signals; a step of generating an extraction process of U\u00d7L 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 U\u00d7L series per carrier generated in the frequency domain, as a process in the frequency domain corresponding to the signal extraction obtained by multiplications of a window function rotating at a Doppler frequency corresponding to each series; a step of generating U series of propagation signals per carrier by performing an addition process of L units of signals for each of the receiving antennas with the input of U\u00d7L series of the propagation signal per carrier extracted by the convolution arithmetic operation of the frequency characteristics of the window function; a step of generating signals in the time domain to be received by the receiving antennas by performing inverse Fourier transform processes with the input of the U series of the propagation signal per carrier generated by the addition process; and a step of generating consecutive signals to be received by the receiving antennas by shifting as much as a length of the window function and adding the signals generated 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): 0.4281833028165759
- 35 USC 102 Novelty (BERT): 0.5475023304494074
- Combined Prediction Score: 0.4401152055798591
- Mean Citation Score: 237.508304
- Max Citation Score: 389.9384
- Similarity Product: 334.6802358289242

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