Arogyaswami Paulraj

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Arogyaswami Paulraj
Arogyaswami Paulraj, PhD
Born Pollachi, Coimbatore, Tamil Nadu, India
Nationality American, Indian
Alma mater The Naval College of Engineering, Lonavla, 1966, B. E.
Indian Institute of Technology, Delhi, 1973, Ph.D.
Occupation Professor Emeritus at the Dept. of Elect. Engineering, Stanford University
Awards IEEE Alexander Graham Bell Medal (2011)
Marconi Prize (2014)

Arogyaswami J. Paulraj was born in Pollachi near Coimbatore, India. He joined the Indian Navy at age 15 through the National Defence Academy, Kharakvalsa and served the Navy for 30 years. Paulraj received his bachelor’s degree in electrical engineering from the Naval College of Engineering, Lonavala, India, and his doctorate in electrical engineering from the Indian Institute of Technology, New Delhi. He is currently a Professor Emeritus at the Dept. of Elect. Engineering, Stanford University.

MIMO development work[edit]

Paulraj is the pioneer of a breakthrough wireless technology known as MIMO (multiple input, multiple output) that dramatically increases performance of wireless systems. MIMO is now core technology in latest WiFi and LTE systems. Paulraj served in India till 1991 where he is known for pioneering the development of military sonars (APSOH family). Paulraj also served as the founding director for three major labs in India - CAIR (Center for Artificial Intelligence and Robotics [1]), CDAC (Center for Development of Advanced Computing) and CRL (Central Research Labs of Bharat Electronics).

Paulraj’s MIMO technology is now crucial to local area and mobile wireless communications. MIMO allows both higher data rates and wider coverage areas. MIMO technology involves using multiple antennas at both the transmit station and the receive station. Efficiency is increased because parallel streams of data can be multiplexed within the same channel.

Paulraj first developed the idea of MIMO in 1992 while at Stanford University. Using the spatial multiplexing concept that exploits MIMO antennas, he demonstrated that spectral efficiency could be improved by transmitting independent data streams from each antenna and then exploiting the distinct spatial signatures of each stream at the receive antennas to separate them. Paulraj was issued a patent for the MIMO concept in 1994. He faced skepticism from industry and funding sources and practical application of the technology was not seen until the early 2000s. Among the obstacles, digital transmission was needed to fully exploit the potential of MIMO, but the U.S. wireless industry was still predominantly analog at the time. However, Paulraj persisted and held annual workshops at Stanford on the technology that eventually helped interest in MIMO and spatial multiplexing take hold.

Other works[edit]

Paulraj founded Iospan Wireless Inc. in 1998 to form the first company to incorporate MIMO technology in a commercial system. The system developed by Paulraj at Iospan helped erase lingering skepticism about the practicality of MIMO. The lessons learned at Iospan gave the wireless industry the confidence to incorporate MIMO into emerging wireless standards, and the technology developed at Iospan such as spatial multiplexing, orthogonal frequency-division multiple access and opportunistic scheduling, can be seen in today’s 4G systems. Intel Corp. acquired part of Iospan in 2003 to help launch its own push into WiMAX, further establishing the importance of Paulraj’s MIMO concept. Paulraj co-founded Beceem Communications in 2003 and the company became a leader in WiMAX chipsets. Beceem was acquired by Broadcom Corp. in 2010.

An IEEE Fellow, Paulraj is also a member of the U.S. National Academy of Engineering and several other scientific / engineering academies. His awards include the IEEE Signal Processing Society Technical Achievement Award and Padma Bhushan from the president of India, one of the country’s highest civilian awards. Paulraj is a Professor Emeritus at Stanford University, Calif., and is also a Senior Advisor to Broadcom Corp., Irvine, Calif.

Achievements in India[edit]

During his 30 years in the Indian (Navy) (1961-1991), he founded three national level laboratories in India and headed one of India’s most successful military R&D projects – APSOH sonar. He received over a dozen awards (many at the national level) in India including the Padma Bhushan, Ati Vishist Seva Medal and the VASVIK Medal.

Awards and honors[edit]


  1. ^ "Events 2009-1010". INS Valsura. Retrieved October 7, 2011. 
  2. ^ "Award Winners". VASVIK. Retrieved October 7, 2011. 
  3. ^ "Fellow Class of 1991". IEEE. Retrieved February 25, 2011. 
  4. ^ "Faculty Honors, SOE Stanford University". Stanford University. Retrieved October 7, 2011. 
  5. ^ "About AAAS - Fellows". American Association for the Advancement of Science. Retrieved February 25, 2011. 
  6. ^ "Technical Achievement Award". IEEE Signal Processing Society. Retrieved February 24, 2011. 
  7. ^ "NAE Members Directory - Dr. Arogyaswami J. Paulraj". National Academy of Engineering. Retrieved February 24, 2011. 
  8. ^ "Members by surname". TWAS. Retrieved February 25, 2011. 
  9. ^ "Ten Scientists, Including Venky Among Padma Awardees". Outlook. 25 January 2010. Retrieved 7 December 2010. 
  10. ^ "IEEE Alexander Graham Bell Medal Recipients". IEEE. Retrieved February 25, 2011. 
  11. ^ "Broadcom Engineer Receives Prestigious IEEE Alexander Graham Bell Medal". Broadcom Corporation. December 1, 2010. Retrieved February 25, 2011. 
  12. ^ "Indo American Professor A J Paulraj wins Marconi Prize 2014". IANS. Biharprabha News. Retrieved 22 January 2014. 

External links[edit]