Method and system for realizing power calibration and data processing of radio frequency receiver of MIMO channel simulator
A radio frequency receiver and channel simulation technology, which is applied in the transmission system, receiver monitoring, transmitter monitoring, etc., can solve the problems that the 5G MIMO system is no longer applicable, so as to reduce the total calibration time, ensure power accuracy, and solve the calibration time and the effect of power accuracy
Active Publication Date: 2021-04-02
SOUTHEAST UNIV +1
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[0003] Therefore, using the traditional ergodic calibration scheme is no longer suitable for 5G MIMO systems
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[0031] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.
[0032] The method for realizing the power calibration and data processing of the MIMO channel simulator radio frequency receiver, its main feature is that the described method comprises the following steps:
[0033] (1) Through active circuit calibration and passive circuit calibration, according to the linear characteristics of the RF digital attenuator, calibrate the frequency response of the amplifier and the direct channel in the RF channel, as well as the frequency response of the digital control attenuator at individual frequency points;
[0034] (2) Perform data calculation according to the existing calibration data, and process to obtain a complete MIMO channel simulator receiver calibration table.
[0035] Preferably, the active circuit calibration in the step (1) includes a switching amplifier cir...
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The invention relates to a method for realizing power calibration and data processing of a radio frequency receiver of an MIMO channel simulator, and the method comprises the following steps: calibrating the frequency response of an amplifier and a straight-through path in a radio frequency path and the frequency response of a numerical control attenuator at an individual frequency point through active circuit calibration and passive circuit calibration according to the linear characteristics of the radio frequency numerical control attenuator; performing data calculation according to the existing calibration data, and performing processing to obtain a complete MIMO channel simulator receiver calibration table. The invention also relates to a system for realizing power calibration and dataprocessing of the MIMO channel simulator radio frequency receiver. By the adoption of the method and system for achieving power calibration and data processing of the MIMO channel simulator radio frequency receiver, the calibration time of a single-channel simulator receiver is prolonged by 10-20 times, and the method and system are particularly suitable for transmitter power calibration of large-scale MIMO. According to the method, the contradiction between the calibration time and the power accuracy of the large-scale MIMO channel simulator receiver is solved, the total calibration durationis shortened, and meanwhile the power accuracy is guaranteed.
Description
technical field [0001] The invention relates to the technical field of calibration of communication measuring instruments, in particular to the field of MIMO channel simulators, in particular to a method and system for realizing power calibration and data processing of a radio frequency receiver of a MIMO channel simulator. Background technique [0002] The number of antennas of the 5G MIMO channel simulator reaches 128 or even 256, corresponding to the number of channels of the receiver of the MIMO channel simulator is 128 or 256. Received power accuracy is one of the important indicators to measure the performance of the channel emulator receiver, which mainly depends on the radio frequency circuit in the receiver. Theoretically, ergodic calibration for different frequencies and different input powers can ensure the optimal power accuracy of the channel emulator receiver. However, for a 256-channel MIMO system, if the ergodic calibration is still used, the calibration tim...
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IPC IPC(8): H04B17/00H04B17/11H04B17/21H04B7/0413
CPCH04B17/0087H04B17/11H04B17/21H04B7/0413Y02D30/70
Inventor 解建红江文冲刘景鑫
Owner SOUTHEAST UNIV