Coherent/noncoherent detection of coherent optical heterodyne DPSK-CDMA and MFSK-CDMA signals
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Authors
Jakubek, David Andrew
Subjects
Coherent optical communications
Optical heterodyne communications
Spread spectrum
CDMA
MFSK modulation
DPSK modulation
Optical heterodyne communications
Spread spectrum
CDMA
MFSK modulation
DPSK modulation
Advisors
Robertson, R. Clark
Ha, Tri T.
Date of Issue
1991-12
Date
December 1991
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The system performance of a coherent optical heterodyne communication system is analyzed for MFSK-CDMA and DPSK-CDMA signaling. The analysis determines the effect that receiver thermal noise, photodetector shot noise, laser phase noise, and multiple user noise has on the system performance. For the single user performance, the probability of bit error of the system is calculated as a function of E(b)/N(0) for laser linewidth-to-bit ratios from 0.1 to 0.01. For both MFSK and DPSK, the system performance is most affected by laser phase noise at higher linewidth-to-bit rate ratios. The multiple user analysis for MFSK-CDMA and DPSK-CDMA is determined by calculating the probability of bit error as a function of the number of users for various laser linewidth-to-bit ratios and codelengths. The observations made for the single user case concerning the effects of laser phase noise are also observed for the multiple user case. when the effects of the laser plane noise no longer dominate system performance, then MFSK-CDM and DPSK-CDMA can be used to increase the user capacity of optical fiber systems.
Type
Thesis
Description
Series/Report No
Department
Department of Electrical and Computer Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
96 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.