Advanced Modulation

Optical Communication System Design

RF spectrum for the in-phase component

Coherent Optical OFDM

Orthogonal frequency division multiplexing (OFDM) is a multicarrier transmission technique where a data stream is carried with many lower-rate subcarrier tones…

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Constellation diagram (for polarization X)

100 Gbps DP-QPSK System with Digital Signal Processing

The combination of polarization-multiplexing and quadrature phase-shift-keying (PM-QPSK or DP-QPSK) is emerging as one the most promising solutions to reach bit rates of 100 Gbps and higher.

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Optical SystemFigure 13 In-phase and Quadrature phase M-ary demodulated signals

Digital Modulation – DPSK

The purpose of this lesson is to demonstrate how to design an 8 DPSK pulse generator using the OptiSystem component library. This tutorial includes references to project files that demonstrate some of the steps presented here. Refer to the end …

Optical System - Figure 2 - OQPSK Eye diagrams In-phase and In-quadrature signals

Digital modulation – OQPSK

The OQPSK modulation is a PSK modulation, using 2 bits per symbol and a delay of one bit in the in quadrature signal (refer to OptiSystem component library, OQPSK Pulse Generator). The project file “OQPSK – Transmitter and Receiver.osd” has an OQPSK transmitter and receiver (Figure 1).

Optical System - Figure 3 - Constellation diagram for a 64 QAM modulation (6 bits per symbol)

Digital modulation – QAM

IntroductionThe QAM modulation is typically used in CATV system for cable modem transmission. The project file The project file “QAM – Transmitter and Receiver.osd” has an QAM transmitter and receiver (Figure 1) using a 64 QAM transmission (6 bits per …

Optical System PAM coding and decoding.

Manchester and PAM Coding/Decoding

A Manchester encoded signal contains frequent level transitions which allow the receiver to extract the clock signal and correctly decode the value and timing of each bit. To allow reliable operation, the transmitted bit stream must contain a high density …

OptiSystem Manuals

Photonics North 2017

June 7-8

Optics and photonics technologies are strategic to the overall growth of many industry sectors in Canada; the pervasive nature of these enabling technologies results in…

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