Practical ultra high bandwidth multiple ADC calibration

Analog to digital conversion is an essential and performance limiting part of modern receiver systems. This work focuses on the calibration of receivers that convert SHF signals to ultra high bandwidth digital samples. Specifically, the emphasis is on systems with a down converter followed by multiple ADCs that must be combined to generate the required aggregate bandwidth. While other authors have sought to maximize the performance benefit of calibration, this study seeks to develop algorithms that can be practically implemented for real time ultra high bandwidth digital samples. The results show that 6 multiplies per ADC sample are required to achieve ENOB performance on the order of the individual ADC outputs for complex sampling and time interleaved sampling, 12 multiplies per ADC are required for frequency subband sampling