In 1971, India asked an IIT Delhi engineer to build its own sonar; decades later, his MIMO invention transformed 4G, 5G and Wi-Fi

Arogyaswami Paulraj: The Indian engineer whose MIMO breakthrough powers 4G, 5G and Wi-Fi In 1971, a naval officer was asked to solve a problem that India could not simply buy its way out of. The Indian Navy needed better anti-submarine sonar, but access to advanced foreign systems was restricted. The officer tasked with finding an...