The character arc of Arogyaswami Paulraj

A life drawn by Character Arc from the public record

Born on 14 April 1944 in Pollachi, near Coimbatore. Between then and now sit the National Defence Academy as a cadet in 1961, a commission in the Indian Navy in 1965, a doctorate in 1973 whose thesis had little practical application, the redesign of a British anti-submarine sonar for Indian warships, a large panoramic sonar deployed across the fleet, three national laboratories founded for the Indian government, early retirement as a commodore in 1991, a move to Stanford, an algorithm over ninety thousand papers now build on, and a proposal called MIMO that almost nobody believed in. The line below draws the story so far, in order.

Drag along the line to move, pinch or use the buttons to look closer. Tap the line to pluck it, or any mark for its card. Drawn from the public record of his life; the sources are at the foot of the page.

Who is Arogyaswami Paulraj?

The industry said it would not work. It is in every device you own.

He was born in Pollachi, near Coimbatore, went to Montfort Boys High School in Yercaud, joined the National Defence Academy as a cadet in 1961 and was commissioned in the Indian Navy in 1965. He was seconded to IIT Delhi for two years from 1969 and developed a unified estimation theory for diffusion signals corrupted by Gaussian noise, using tools from stochastic calculus. He received his doctorate in 1973, and the record is blunt about the result: the thesis work had little practical application, because the integrals could not be computed.

What he did with that is the first useful thing about him. He went and built machines. From 1972 to 1974 he led a team at IIT Delhi that redesigned a British-origin anti-submarine sonar fitted to Indian warships, and the new design went into the fleet. From 1977 to 1983 he led the development of a large surface ship panoramic sonar that was widely deployed. He was a visiting scholar at Loughborough and then at Stanford from 1983 to 1986, and while there invented the ESPRIT algorithm for high resolution parameter estimation, which over ninety thousand research papers now build on.

Between 1987 and 1991 he founded or co-founded three national laboratories for the Indian government: a centre for artificial intelligence and robotics, a central research laboratory for a defence electronics company, and a centre for the development of advanced computing. Three institutions in four years, which is a career in itself.

Then in 1991, as a naval commodore, he took early retirement and left India for the United States. He joined Stanford as a research associate and was appointed a research professor in 1993. Soon after arriving he proposed the technique now known as MIMO, multiple input multiple output, which raises data rates by transmitting parallel spatial streams.

And nobody wanted it. MIMO faced significant scepticism from research agencies and from industry. His 1992 patent, which named his supervisor Thomas Kailath as co-inventor, put broadcast television forward as an application while also discussing mobile wireless. It went on to remake wireless technology completely, and is now in essentially every wireless device manufactured. He is Professor Emeritus in electrical engineering at Stanford.

The moments

Arogyaswami Paulraj's timeline.

The 1940s

14 Apr 1944

Born in Pollachi

Everyday. Pollachi, near Coimbatore.

The 1960s

Jun 1961

A cadet at seventeen

Milestone, and it changed his direction. Seventeen, and into the academy.

Jun 1969

Two years at IIT Delhi

Milestone, and it changed his direction. The Navy sent him to do mathematics.

The 1970s

Jun 1973

A thesis with no use

Setback, and it changed everything. The doctorate was elegant and could not be used.

Jun 1974

He rebuilds a sonar

Milestone, and it changed everything. He stopped doing theory and built something that shipped.

The 1980s

Jun 1983

A panoramic sonar for the fleet

Milestone, and it changed everything. Six years, and it went across the whole fleet.

Jun 1985

ESPRIT, at Stanford

Milestone, and it changed everything. Ninety thousand papers, built on one algorithm.

Jun 1987

Three national laboratories

Milestone, and it changed everything. Three institutions in four years.

The 1990s

1 Jan 1991

Keep the rank, or start again

Crossroads, decided.

The paths laid out: retire early and go, taken, or stay a commodore. He proposed MIMO within a year of arriving, and it remade wireless technology after the industry had dismissed it.

Jun 1991

He retires early and leaves

Milestone, and it changed everything. Forty seven, a commodore, and he started again.

Sep 1991

Stanford

Milestone, and it changed his direction. He arrived as a research associate at forty seven.

Jun 1992

He proposes MIMO

Milestone, and it changed everything. A patent, filed on an idea nobody wanted.

Jun 1993

Nobody believes it

Setback, and it changed everything. The agencies doubted it and so did the industry.

The 2000s

Jun 2005

It remakes wireless

Milestone, and it changed everything. The dismissed idea became the standard.

The 2010s

Jun 2015

Professor Emeritus

Milestone, and it changed his direction. Emeritus, at the school he arrived at as a research associate.

Every router, every phone and every wireless link you used today runs on the idea that was dismissed when he proposed it. What he set moving is a useful reminder that the reception an idea gets on the day is not information about whether the idea is right.

Your turn

Every line draws a unique story.

His had a doctorate that led nowhere and an invention everybody dismissed, and both are in the middle of it. Yours is already further along than you think, and drawing it takes about five minutes.

Step through

Draw my own line Explore Character Arc

Arogyaswami Paulraj: frequently asked questions

What people ask about his line.

What is Arogyaswami Paulraj's character arc?

A naval officer whose doctorate turned out to have no practical use, who built sonar for a fleet instead, founded three national laboratories, retired early at forty seven, and proposed an idea the whole industry dismissed.

What is MIMO, invented by Arogyaswami Paulraj?

Multiple input multiple output, a technique that raises data rates by transmitting parallel spatial streams. He proposed it soon after arriving at Stanford and patented it in 1992, and it went on to remake wireless technology completely.

Was MIMO by Arogyaswami Paulraj accepted at first?

No. It faced significant scepticism both from research agencies and from the industry when he proposed it. His 1992 patent, which named his supervisor Thomas Kailath as a co-inventor, initially highlighted broadcast television as an application while also discussing mobile wireless communications.

What did Arogyaswami Paulraj do in the Indian Navy?

He was commissioned in 1965 and led engineering work: from 1972 to 1974 a team that redesigned a British-origin anti-submarine sonar for Indian warships, and from 1977 to 1983 the development of a large panoramic sonar deployed across the fleet.

What laboratories did Arogyaswami Paulraj found?

Three national laboratories for the Indian government between 1987 and 1991: a centre for artificial intelligence and robotics, a central research laboratory for a defence electronics company, and a centre for the development of advanced computing.

What is the ESPRIT algorithm by Arogyaswami Paulraj?

A method for high-resolution parameter estimation that he invented while a visiting scholar at Stanford between 1983 and 1986. There are over ninety thousand research papers building on that invention.

Where does this timeline of Arogyaswami Paulraj's life come from?

From the public record. Character Arc drew every moment on this line from the sources listed at the foot of the page, and the kind and weight of each moment are our editorial reading. Arogyaswami Paulraj isn't a Member of Character Arc and has no connection with it, and no feeling is attributed to him.

More character arcs

Lives that rhyme with his.

Every Character, A to Z

Sources

Arogyaswami Paulraj, English Wikipedia biography, filed under living people.
His 1992 MIMO patent, naming Thomas Kailath as co-inventor.
The ESPRIT algorithm, and the research literature building on it.
His Indian Navy sonar programmes, as that biography records them.