Research on a Low-Complexity Multi-channel High-Precision Amplitude and Phase Calibration Algorithm

In a multi-channel receiver synchronous acquisition system, the difference in the characteristics of the analog devices and synchronization time difference between multiple channels will cause the inconsistency of amplitude and phase, resulting in the performance degradation of multi-channel receivers such as radar, signal reconnaissance, and measurement and control. Therefore, this paper proposes a low-complexity and high-precision amplitude and phase calibration algorithm, which is simple to implement, requires low hardware, and runs fast. Simulation experiments show that the calibration algorithm proposed in this paper has an amplitude accuracy of ±0.015dB and a phase accuracy of ±0.009° under the condition of inconsistent amplitude and phase, and it has also achieved good results in practical engineering applications.