Ultra-wide-range Multi-rate DPSK Laser Communications

Caplan, D.O.; Rao, Hemonth G.; Wang, J.P.; Boroson, Don M.; Carney, John; Fletcher, Andrew S.; Hamilton, Scott A.; Kochhar, R.; Magliocco, R. J.; Murphy, Robert J.; Norvig, M.; Robinson, Bryan S.; Schulein, Robert; Spellmeyer, Neal

doi:10.1364/cleo.2010.cpda8

Cited by 28 publications

(29 citation statements)

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“…LCRD leverages a MIT/LL previously designed DPSK modem [5] as a cost effective approach to providing a DPSK signal. It can both transmit and receive data at an (uncoded) rate from 72 Mbps to 2.88 Gbps.…”

Section: Flight Modemsmentioning

confidence: 99%

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Overview of the Laser Communications Relay Demonstration Project

Edwards¹,

Israel²,

Wilson

et al. 2013

Space Operations: Experience, Mission Systems, and Advanced Concepts

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This paper provides an overview of the Laser Communications Relay Demonstration Project (LCRD), a joint project between NASA's Goddard Space Flight Center (GSFC), the Jet Propulsion Laboratory, California Institute of Technology (JPL), and the Massachusetts Institute of Technology Lincoln Laboratory (MIT/LL). LCRD will provide two years of continuous high data rate optical communications in an operational environment, demonstrating how optical communications can meet NASA's growing need for higher data rates, or for the same data rate provided by a comparable RF system, how it enables lower power, lower mass communications systems on user spacecraft. In addition, LCRD's architecture will allow it to serve as a testbed in space for the development of additional symbol coding, link and network layer protocols, etc. This paper reviews the current concepts and designs for the flight and ground optical communications terminals, the critical technologies required, and the concept of operations. It reports preliminary conclusions from several trade studies conducted at GSFC, JPL, and MIT/LL. The flight optical communications terminals will be flown on a commercial communications satellite in geosynchronous orbit to be launched no earlier than December 2016, and will demonstrate a technology critical for NASA's Next Generation Tracking and Data Relay Satellite.

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Section: Flight Modemsmentioning

confidence: 99%

“…As demodulation is accomplished with a Mach-Zehnder optical interferometer, the clock rate remains fixed. The DPSK transmitter utilizes a MOPA architecture similar to the PPM transmitter [5]. The EDFA amplifies the optical signal to a 0.5-W average power level.…”

Section: Flight Modemsmentioning

confidence: 99%

Overview of the Laser Communications Relay Demonstration Project

Edwards¹,

Israel²,

Wilson

et al. 2013

Space Operations: Experience, Mission Systems, and Advanced Concepts

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“…[6][7][8][9][10][11]. One approach uses pulse-position modulation (PPM), which has been demonstrated experimentally to achieve sensitivities within 1-dB of theory.…”

Section: Introductionmentioning

confidence: 99%

“…8,9 Another experimental demonstration using burst-rate DSPK achieved a 30-dB range of data rates from 2.4-Mb∕s to 2.5-Gb∕s while maintaining sensitivity performance within 1.0-dB of DPSK theory. 10 The lower bound on data-rate scaling for PPM and burst-rate DPSK systems is governed by nonlinear impairments that arise when low duty-cycle signals are introduced to a high-power optical amplifier. 10 Systems employing 100% duty cycle waveforms can further extend data-rate scaling.…”

Section: Introductionmentioning

confidence: 99%

“…10 The lower bound on data-rate scaling for PPM and burst-rate DPSK systems is governed by nonlinear impairments that arise when low duty-cycle signals are introduced to a high-power optical amplifier. 10 Systems employing 100% duty cycle waveforms can further extend data-rate scaling. M-ary frequency shift keying (FSK) has also been demonstrated as a technique capable of achieving sensitivities within 1.5 dB of FSK theory while enabling rate scaling from Mb/s to Gb/s using custom receiver architecture.…”

Section: Introductionmentioning

confidence: 99%

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Demonstration of a variable data-rate free-space optical communication architecture using efficient coherent techniques

et al. 2016

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Abstract. The next generation free-space optical (FSO) communications infrastructure will need to support a wide range of links from space-based terminals in low Earth orbit, geosynchronous Earth orbit, and deep space to the ground. Efficiently enabling such a diverse mission set requires an optical communications system architecture capable of providing excellent sensitivity (i.e., few photons-per-bit) while allowing reductions in data rate for increased system margin. Specifically, coherent optical transmission systems have excellent sensitivity and can trade data rate for system margin by adjusting the modulation format, the forward error correction (FEC) code rate, or by repeating blocks of channel symbols. These techniques can be implemented on a common set of hardware at a fixed system baud rate. Experimental results show that changing modulation formats between quaternary phase-shifted keying and binary phase-shifted keying enables a 3-dB scaling in data rate and a 3.5-dB scaling in system margin. Experimental results of QPSK transmission show a 5.6-dB scaling of data rate and an 8.9-dB scaling in system margin by varying the FEC code rate from rate-9∕10 to rate-1∕4. Experimental results also show a 45.6-dB scaling in data rate over a 41.7-dB range of input powers by block-repeating and combining a pseudorandom binary sequence up to 36,017 times. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Optical Satellite Communications

Hemmati

Caplan

2013

Optical Fiber Telecommunications

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Ultra-wide-range Multi-rate DPSK Laser Communications

Cited by 28 publications

References 0 publications

Overview of the Laser Communications Relay Demonstration Project

Overview of the Laser Communications Relay Demonstration Project

Demonstration of a variable data-rate free-space optical communication architecture using efficient coherent techniques

Optical Satellite Communications

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