Emulator system and emulating method for satellite communication
An emulator system and an emulating method for satellite communication are provided. The emulating method includes: providing a first antenna array, wherein the first antenna array includes a plurality of antenna units arranged along a first direction; mounting the device under test on a virtual plane by a jig; enabling a first beam by the first antenna array; steering the first beam to the device under test by a default angle of incidence; transmitting a first signal to the device under test via the first beam, and receiving a second signal corresponding to the first signal from the device under test; calculating a value of phase difference according to the second signal; determining whether the device under test passes a test according to the value of phase difference and a threshold to generate a testing result; and outputting the testing result.
1 . An emulator system for satellite communication, suitable for a device under test, comprising:
a first antenna array, comprising a plurality of antenna units arranged along a first direction;
a jig for mounting the device under test on a virtual plane; and
a controller, communicatively connected to the first antenna array, wherein the controller is configured to:
enable a first beam by the first antenna array;
steer the first beam to the device under test by a default angle of incidence;
transmit a first signal to the device under test via the first beam, and receive a second signal corresponding to the first signal from the device under test, wherein the device under test transmits the second signal toward the first antenna array with a steering angle;
calculate a value of phase difference between the default angle of incidence and the steering angle;
determine whether the device under test passes a test of detecting an angle of arrival according to the value of phase difference and a threshold to generate a testing result; and
output the testing result.
2 . The emulator system according to claim 1 , wherein a projection of the first antenna array on the virtual plane overlaps with the jig.
3 . The emulator system according to claim 1 , wherein a projection of the first antenna array on the virtual plane does not overlaps with the jig.
4 . The emulator system according to claim 1 , wherein the controller enables a second beam different from the first beam by the first antenna array, and communicates with the device under test via the second beam to generate the testing result.
5 . The emulator system according to claim 1 , further comprising:
a second antenna array, comprising a plurality of antenna units arranged along a second direction, wherein the second antenna array communicatively connected to the controller, wherein the controller enables the first beam by the first antenna array and the second antenna array.
6 . The emulator system according to claim 1 , further comprising:
a second antenna array, comprising a plurality of antenna units arranged along a second direction, wherein the second antenna array communicatively connected to the controller, wherein the controller enables a second beam by the second antenna array, and communicates with the device under test via the second beam to generate the testing result.
7 . The emulator system according to claim 1 , wherein the first antenna array further comprising:
a phase shifter, electrically connected to a first antenna unit of the plurality of antenna units, wherein
the controller performs a phase shifting on the second signal by the phase shifter to obtain a shifted signal, and calculates the value of phase difference according to the shifted signal.
8 . The emulator system according to claim 7 , wherein the controller further configured to:
receive a calibration signal from the device under test; and
compensate the shifted signal according to the calibration signal to calculate the value of phase difference.
9 . The emulator system according to claim 1 , wherein the controller adjusts a mocked-height of an emulated satellite of the satellite communication by adjusting a signal strength of the first beam.
10 . The emulator system according to claim 9 , wherein the controller adjusts a mocked angle of incidence by adjusting the default angle of incidence based on the mocked-height.
11 . The emulating system according to claim 1 , wherein the jig is a movable object and is electrically connected to the controller, wherein the controller configures the jig to make the virtual plane has six degrees of freedom.
12 . An emulating method for satellite communication, suitable for a device under test, comprising:
providing a first antenna array, wherein the first antenna array comprises a plurality of antenna units arranged along a first direction;
mounting the device under test on a virtual plane by a jig;
enabling a first beam by the first antenna array;
steering the first beam to the device under test by a default angle of incidence;
transmitting a first signal to the device under test via the first beam, and receiving a second signal corresponding to the first signal from the device under test, wherein the device under test transmits the second signal toward the first antenna array with a steering angle;
calculating a value of phase difference between the default angle of incidence and the steering angle;
determining whether the device under test passes a test of detecting an angle of arrival according to the value of phase difference and a threshold to generate a testing result; and
outputting the testing result.
13 . The emulating method according claim 12 , wherein a projection of the first antenna array on the virtual plane overlaps with the jig.
14 . The emulating method according to claim 12 , wherein a projection of the first antenna array on the virtual plane does not overlaps with the jig.
15 . The emulating method according to claim 12 , further comprising:
enabling a second beam different from the first beam by the first antenna array; and
communicating with the device under test via the second beam to generate the testing result.
16 . The emulating method according to claim 12 , further comprising:
providing a second antenna array, wherein the second antenna array comprises a plurality of antenna units arranged along a second direction, wherein
the step of enabling the first beam by the first antenna array comprising:
enabling the first beam by the first antenna array and the second antenna array.
17 . The emulating method according to claim 12 , further comprising:
providing a second antenna array, wherein the second antenna array comprises a plurality of antenna units arranged along a second direction, wherein
the step of generating the testing result comprising:
enabling a second beam by the second antenna array; and
communicating with the device under test via the second beam to generate the testing result.
18 . The emulating method according to claim 12 , wherein the step of calculating the value of phase difference according to the second signal comprising:
performing a phase shifting on the second signal to obtain a shifted signal; and
calculating the value of phase difference according to the shifted signal.
19 . The emulating method according to claim 18 , wherein the step of calculating the value of phase difference according to the shifted signal comprising:
receiving a calibration signal from the device under test; and
compensating the shifted signal according to the calibration signal to calculate the value of phase difference.
20 . The emulating method according to claim 12 , further comprising:
adjusting a mocked-height of an emulated satellite of the satellite communication by adjusting a signal strength of the first beam.