Arogyaswami Paulraj, commonly known as Arogyaswami Joseph Paulraj, is an Indian-American electrical engineer and a prominent inventor in the field of wireless communication. He was born on September 1, 1944, in Pollachi, Tamil Nadu, India. Paulraj is best known for his contributions to the development of Multiple Input Multiple Output (MIMO) technology, which has significantly improved wireless communication systems. MIMO technology involves using multiple antennas for both transmitting and receiving data in wireless communication systems. It allows for improved data rates, increased capacity, and better reliability in wireless networks. Paulraj's research and innovations in MIMO have had a profound impact on various wireless technologies, including Wi-Fi and 4G LTE.