I recommend you read this post from Elettra Venosa : https://www.eeweb.com/blog/elettra_venosa/comparison-of-iq-sampling-with-dual-core-adcs-vs-ping-pong-single-core-adc which does a good job of explaining it.
I recommend you read this post from Elettra Venosa : https://www.eeweb.com/blog/elettra_venosa/comparison-of-iq-sampling-with-dual-core-adcs-vs-ping-pong-single-core-adc which does a good job of explaining it.