Radio wave propagation environment reproduction system and radio wave propagation environment reproduction method

1 . A radio wave propagation environment reproduction system comprising:

a transmitter to transmit radio waves in a predetermined direction in a reverberation chamber;

a reflection angle change RIS to reflect the radio waves transmitted by the transmitter at an angle according to a control signal;

an installation angle controller to control an installation angle of the reflection angle change RIS by outputting a control signal to the reflection angle change RIS;

a reflection angle controller to control a reflection angle of the radio waves by the reflection angle change RIS by outputting a control signal to the reflection angle change RIS;

a direction-of-arrival estimator to estimate a direction of arrival of the radio waves reflected by the reflection angle change RIS at a predetermined position in the reverberation chamber; and

a control server to control the installation angle controller and the reflection angle controller on the basis of the direction of arrival of the radio waves estimated by the direction-of-arrival estimator.

2 . The radio wave propagation environment reproduction system according to claim 1 , wherein

the transmitter includes

an antenna in which a half-value angle indicating directivity matches a line-of-sight range for the reflection angle change RIS.

3 . A radio wave propagation environment reproduction system comprising:

a transmitter to transmit radio waves in a predetermined direction in a reverberation chamber;

a reflector to reflect the radio waves transmitted by the transmitter;

an installation angle controller to control an installation angle of the reflector by outputting a control signal to the reflector;

a reflected power change RIS to change the radio waves reflected by the reflector to power according to a control signal and reflects the power;

a reflected power controller to control the power of the radio waves reflected by the reflected power change RIS by outputting a control signal to the reflected power change RIS;

a direction-of-arrival estimator to estimate a direction of arrival of the radio waves reflected by the reflected power change RIS at a predetermined position in the reverberation chamber; and

a control server to control the installation angle controller and the reflected power controller on the basis of the direction of arrival of the radio waves estimated by the direction-of-arrival estimator.

4 . The radio wave propagation environment reproduction system according to claim 3 , wherein

the transmitter includes

an antenna in which a half-value angle indicating directivity matches a line-of-sight range for the reflector.

5 . A radio wave propagation environment reproduction method comprising:

controlling an installation angle of a reflection angle change RIS to reflect radio waves transmitted by a transmitter in a predetermined direction in a reverberation chamber at an angle according to a control signal;

controlling a reflection angle of the radio waves reflected by the reflection angle change RIS according to a control signal;

estimating a direction of arrival of the radio waves reflected by the reflection angle change RIS at a predetermined position in the reverberation chamber; and

controlling the installation angle and the reflection angle of the reflection angle change RIS on the basis of the estimated direction of arrival of the radio waves.

6 . The radio wave propagation environment reproduction method according to claim 5 , wherein

the transmitter includes

an antenna in which a half-value angle indicating directivity matches a line-of-sight range for the reflection angle change RIS.