The Telecommunications and Mission Operations Progress Report 42-135

July-September 1998

Joseph H. Yuen
Editor in Chief


November 15, 1998

NASA Logo
National Aeronautics and
Space Administration

Jet Propulsion Laboratory
California Institute of Technology
Pasadena, California


Contents

Note From the Editor

Preface

A Dual-Loop Opto-Electronic Oscillator
X. S. Yao, L. Maleki, Y. Ji, G. Lutes, and M. Tu
NASA Code 314-30-11-40-04

Recent Results With Coupled Opto-Electronic Oscillators
X. S. Yao, L. Maleki, C. Wu, L. Davis, and S. Forouhar
NASA Code 314-30-11-40-04

An Earth-to-Deep-Space Optical Communications System With Adaptive Tilt and Scintillation Correction Using Near-Earth Relay Mirrors
J. W. Armstrong, C. Yeh, and K. E. Wilson
NASA Code 314-30-42-02-09

Design and Performance of the DSS-14 Antenna Controller
W. Gawronski, H. G. Ahlstrom, Jr., and A. B. Bernardo
NASA Code 314-30-55-02-22

A Noise-Temperature Measurement System Using a Cryogenic Attenuator
J. E. Fernandez
NASA Code 314-30-63-15-01

The Effect of Phase and Amplitude Imbalance on the Performance of Offset Quadrature Phase-Shift-Keyed (OQPSK) Communication Systems
H. Tsou
NASA Code 315-90-41-13-05

Flexible Carrier Loop Design for the Spacecraft Transponding Modem (STM)
J. B. Berner, J. M. Layland, and P. W. Kinman
NASA Code 315-91-10-13-10

Receiver Structure and Performance for Trellis-Coded Pulse-Position Modulation in Optical Communication Systems
M. Srinivasan
NASA Code 315-91-12-20-05

T-PPM: A Novel Modulation Scheme for Optical Communication Systems Impaired by Pulse-Width Inaccuracies
K. Kiasaleh and T.-Y. Yan
NASA Code 315-91-12-20-05


The research described in this publication was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Reference herein to any specific commercial product, service, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorsement by the United States Government or the Jet Propulsion Laboratory, California Institute of Technology.


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