Gerardo Ortiz

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Proceedings of the IEEE | 2007

Abhijit Biswas; Bruce Moision; William T. Roberts; William H. Farr; Andrew Gray; Kevin J. Quirk; Jon Hamkins; Michael K. Cheng; Jonathan W. Gin; Michael A. Nakashima; Gerardo Ortiz; Sabino Piazzolla; Carl Christian Liebe; David L. Losh

Significant technological advances were made toward utilizing the Hale telescope for receiving the faint laser communication signals transmitted from an optical transceiver on a spacecraft orbiting Mars. The so-called Palomar receive terminal design, which would have supported nominal downlink data rates of 1-30 Mbps, is described. Testing to validate technologies for near-Sun (3deg from edge of solar disc) daytime operations is also discussed. Finally, a laboratory end-to-end link utilizing a 64-ary pulse-position modulated photon-counting receiver and decoder that achieved predicted near-capacity (within 1.4 dB) performance is described.

Storage and Retrieval for Image and Video Databases | 2003

Gerardo Ortiz; Shinhak Lee; Steve Monacos; Malcolm W. Wright; Abhijit Biswas

Storage and Retrieval for Image and Video Databases | 1999

John Sandusky; Muthu Jeganathan; Gerardo Ortiz; Abhijit Biswas; Sukhan Lee; George Parker; Brad Liu; Donald R. Johnson; Jon de Pew; James R. Lesh

Archive | 2008

Gerardo Ortiz; William H. Farr

2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS) | 2017

Abhijit Biswas; Meera Srinivasan; Ryan Rogalin; Sabino Piazzolla; John K. Liu; Brian Schratz; Andre Wong; Erik Alerstam; Malcolm W. Wright; William T. Roberts; Joseph Kovalik; Gerardo Ortiz; Arthur Na-Nakornpanom; Matthew D. Shaw; Clay Okino; Kenneth Andrews; Michael Peng; David Orozco; William M. Klipstein

Archive | 2011