Abstract
Amplitude-phase consistency of multiple input multiple output (MIMO) transceivers has a significant impact on the performance of digital beamforming algorithms and MIMO communication algorithms. Based on the concept of software defined radio (SDR), architecture of a MIMO transceiver with a amplitude-phase consistency calibration scheme was designed. By looping the output signals into input channels, amplitude-phase consistency of the output or input channels can be measured, thus the channel calibration was performed in the digital signal processing. Based on the designed architecture, a MIMO transceiver prototype was implemented by adopting SDR radio frequency (RF) agile transceivers and a digital signal processing system on chip (SOC), with software running on it also implemented. Experiments show that the MIMO transceiver achieves high amplitude-phase consistency performance after calibration, and has the characteristics of high integration, miniaturization and high flexibility.
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