Hamid Jafarkhani

Hamid Jafarkhani ( en persa : حمید جعفرخانی ) (nacido en 1966 en Teherán ) es un ingeniero eléctrico y profesor estadounidense de origen iraní . Es profesor titular de ingeniería eléctrica e informática en la Escuela de Ingeniería Henry Samueli de la Universidad de California, Irvine (UC Irvine). Su investigación se centra en la teoría de las comunicaciones , en particular en la codificación y las redes y comunicaciones inalámbricas .

Prior to studying at the University of Tehran, he was ranked first in the nationwide entrance examination of Iranianuniversities in 1984. After receiving his B.S.degree in 1989, he studied at the University of Maryland College Park and obtained his M.S. degree in 1994 followed by his Ph.D. in 1997. After graduating, Jafarkhani joined AT&T Laboratories-Research in August 1997 before moving to Broadcom in July 2000 and to the University of California, Irvine in September 2001.

Within the wireless communications field, Jafarkhani is best known as the primary/main inventor of space-time codes (jointly with Siavash Alamouti and Nambirajan Seshadri) ^[1] and for his two seminal papers^[2][3] which established the field of space–time block coding, published whilst working for AT&T. The first of these, "Space–time block codes from orthogonal designs", established the theoretical basis for space–time block codes, and the second, "Space–time block coding for wireless communications: performance results", provided numerical analysis of the performance of the first such codes. Space–time codes rely on the use of multiple antennas at the transmit side of a wireless link. Multiple copies of the same data are transmitted from these multiple antennas in such a way that the receiver has a much better chance of correctly detecting the signal in the presence of corruption and noise than if just one copy is sent. The performance of space–time coded systems, in terms of the reliability of the transmission is significantly better than non-coded systems. Space–time block codes in particular are known to be simple to implement and effective, and Jafarkhani's ideas in these two papers triggered the massive international research effort into them that continues today.

Later, in 2001, Jafarkhani introduced quasi-orthogonal space–time block codes^[4] which overcome some of the difficulties inherent in earlier codes, at a cost of transmitting less data. These too are now widely studied. Then, in 2003 he introduced a more powerful version of his original codes, the super-orthogonal space–time trellis codes^[5] which combine the effects of both block codes and space–time trellis codes. Again, this work has led to significant research efforts around the world.

Jafarkhani recibió el premio CAREER de la Fundación Nacional de Ciencias en enero de 2003 ^{[ 6 ]} , que reconoce a científicos e ingenieros destacados que, al inicio de sus carreras, demuestran un potencial excepcional para el liderazgo en la vanguardia del conocimiento. ^{[ 7 ]} También es miembro del Instituto de Ingenieros Eléctricos y Electrónicos (IEEE) por sus contribuciones a la codificación espacio-temporal, ^{[ 8 ]} editor de IEEE Transactions on Wireless Communications y editor asociado de IEEE Communications Letters . Jafarkhani es autor de Space-Time Coding: Theory and Practice , ^{[ 9 ]} publicado en septiembre de 2005.

Jafarkhani es co-receptor del Premio IEEE Eric E. Sumner 2013 por sus destacadas contribuciones a la tecnología de las comunicaciones. También recibió el Premio de la Sociedad de Comunicaciones del IEEE por sus avances en comunicación. ^{[ 10 ]}