US 12,756,488 B2Granted

Test system and evaluation method

AssigneeAnritsu Corporation

InventorsTakeshi Kobayashi, Keisuke Takizawa, Hirofumi Suganuma, Ikuya Otani

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Abstract

A test system includes an actual propagation path characteristic calculation unit that calculates estimation characteristics, at analysis target timings, of propagation path characteristics of channels constituting an actual propagation path, a channel model parameter calculation unit that calculates channel model parameters characterizing statistical properties of the estimation characteristics, a simulation propagation path characteristic generation unit that generates simulation propagation path characteristics according to the channel model parameters, a simulation channel capacity calculation unit that calculates a channel capacity of the simulation propagation path characteristics, an actual propagation path channel capacity calculation unit that calculates a channel capacity of the estimation characteristics at some analysis target timings among the analysis target timings, and a channel capacity evaluation unit that calculates an evaluation indicator for evaluating a degree of similarity between the channel capacity of the simulation propagation path characteristics and the channel capacity of the estimation characteristics.

Claims8

Dependent claims

A test system comprising:

an actual propagation path characteristic calculation unit that uses IQ data, which is obtained from a downlink signal transmitted from a network-side transmission/reception device and which is output from an antenna device that receives the downlink signal in an environment of an actual propagation path, to calculate estimation characteristics, at a plurality of analysis target timings, of propagation path characteristics of one or more channels constituting the actual propagation path;
a channel model parameter calculation unit that calculates channel model parameters characterizing statistical properties of the estimation characteristics;
a simulation propagation path characteristic generation unit that generates a plurality of simulation propagation path characteristics according to the channel model parameters;
a simulation channel capacity calculation unit that calculates a channel capacity of the plurality of simulation propagation path characteristics;
an actual propagation path channel capacity calculation unit that calculates a channel capacity of the estimation characteristics at some analysis target timings among the plurality of analysis target timings;
and
a channel capacity evaluation unit that calculates evaluation indicators for evaluating a degree of similarity between the channel capacity of the plurality of simulation propagation path characteristics and the channel capacity of the estimation characteristics.

4 more elements

An evaluation method comprising:

an actual propagation path characteristic calculation step of using IQ data, which is obtained from a downlink signal transmitted from a network-side transmission/reception device and which is output from an antenna device that receives the downlink signal in an environment of an actual propagation path, to calculate estimation characteristics, at a plurality of analysis target timings, of propagation path characteristics of one or more channels constituting the actual propagation path;
a channel model parameter calculation step of calculating channel model parameters characterizing statistical properties of the estimation characteristics;
a simulation propagation path characteristic generation step of generating a plurality of simulation propagation path characteristics according to the channel model parameters;
a simulation channel capacity calculation step of calculating a channel capacity of the plurality of simulation propagation path characteristics;
an actual propagation path channel capacity calculation step of calculating a channel capacity of the estimation characteristics at some analysis target timings among the plurality of analysis target timings;
and
a channel capacity evaluation step of calculating evaluation indicators for evaluating a degree of similarity between the channel capacity of the plurality of simulation propagation path characteristics and the channel capacity of the estimation characteristics.

4 more elements

Dependencies are inferred from the claim text.