scholarly journals Optical 8PSK Modulation Format Generator Basedon Three Microring Modulators

2021 ◽  
Author(s):  
Satyabrata Singha ◽  
Sanjukta Bhowmik ◽  
Nitish Sinha ◽  
Bishanka Brata Bhowmik
Keyword(s):  
Phase Shift ◽  
Bit Error Rate ◽  
Signal To Noise Ratio ◽  
Optical Signal ◽  
Phase Shift Keying ◽  
Result Section ◽  
Modulation Format ◽  
Quadrature Phase ◽  
Shift Keying ◽  
In Series

Abstract We have proposed an 8PSK modulator based on three microring modulators (MRM). The design consists of three MRMs, each with a radius of 11.1μm. Of these three, two MRMs are connected in parallel and they together generate a QPSK (Quadrature phase shift keying) signal. While at the output port of the QPSK, a third MRM is connected in series works as an angle modulator, which is basically a 45o phase shift modulator; i.e., the output of the MRM varies by 45o depending on the bit pattern fed to it, ’0’or ’1’ respectively. In the result section, we have simulated and shown the performance of the proposed 2.5 GBaud 8PSK modulator after transmitting the modulated signal through various lengths of optical fiber. The bit error rate (BER) vs. optical signal to noise ratio (OSNR) curve shows that, 10−3BER has been achieved at 13.5dB OSNR.

scholarly journals VISUALISASI SISTEM ASYMMETRIC DIGITAL SUBSCRIBER LINE (ADSL) DENGAN MENGGUNAKAN MODULASI QUADRATURE PHASE SHIFT KEYING (QPSK)

2016 ◽  
Vol 3 (1) ◽  
pp. 1-6
Author(s):  
Ahmat Sobri ◽  
Irwan Dinata ◽  
Rudy Kurniawan
Keyword(s):  
Phase Shift ◽  
Gaussian Noise ◽  
Signal To Noise Ratio ◽  
Phase Shift Keying ◽  
Digital Subscriber Line ◽  
Asymmetric Digital Subscriber Line ◽  
Subscriber Line ◽  
Quadrature Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying

Sistem Asymmetric Digital Subscriber Line (ADSL) merupakan teknologi akses yang memungkinkan terjadinya komunikasi data, suara dan video secara bersamaan pada media akses tembaga. Komunikasi data tidak dapat dihindarkan dari adanya derau, tidak terkecuali sistem ADSL yang mengalami kesalahan dalam hal pengiriman yang disebabkan adanya derau sehingga membuat nilai bit error rate (BER) meningkat. Oleh karena itu, diperlukan cara untuk mengurangi derau sehingga dapat memperkecil nilai BER. Untuk mengurangi derau dan mendapatkan nilai BER maka diperlukan metode modulasi Quadrature phase shift keying (QPSK) pada sistem ADSL. Visualisasi sistem dibutuhkan untuk mengetahui kinerja dari sistem ADSL dan mengetahui BER yang di timbulkan. Dari hasil visualisasi dengan memberikan masukan data 64 bit, menampilkan konstelasi yang mengalami penyebaran data tetapi tidak merusak bentuk dari konstelasi. Ketika konstelasi masuk ke kanal Additif White Gaussian Noise (AWGN) dengan simpangan antara 0 dB – 20 dB dan interval 2 dB, dihasilkan nilai BER 0.3906 pada saat Signal to Noise Ratio (SNR) bernilai 0 dB sampai akhirnya BER bernilai nol pada saat SNR berkisar antara 9 dB - 20 dB.

Reception of Polarization-Multiplexed QPSK Using Different Receivers with and without Differential Decoding

2015 ◽  
Vol 36 (3) ◽  
Author(s):  
Iqbal Kaur ◽  
Kamaljit Singh Bhatia ◽  
Harsimrat Kaur
Keyword(s):  
Phase Shift ◽  
Bit Error Rate ◽  
Local Oscillator ◽  
Training Sequence ◽  
Mean Square ◽  
Least Mean Square ◽  
Phase Shift Keying ◽  
Quadrature Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying

AbstractIn this paper, we analyze polarization-multiplexed quadrature phase shift keying (PM-QPSK) signals using different receiver with and without differential decoding for PM-QPSK modulation and reception using training sequence-based least mean square (LMS) receiver, PM-QPSK with external local oscillator, PM-QPSK modulation and LMS dynamic receiver and compare their results for bit error rate.

Digital-analog hybrid optical phase-lock loop for optical quadrature phase-shift keying

2020 ◽  
Vol 18 (9) ◽  
pp. 090602
Author(s):  
Shaowen Lu ◽  
Yu Zhou ◽  
Funan Zhu ◽  
Jianfeng Sun ◽  
Yan Yang ◽  
...  
Keyword(s):  
Phase Shift ◽  
Phase Lock Loop ◽  
Phase Shift Keying ◽  
Phase Lock ◽  
Optical Phase ◽  
Quadrature Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying

scholarly journals Securing ZigBee Commercial Communications Using Constellation Based Distinct Native Attribute Fingerprinting

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Christopher M. Rondeau ◽  
J. Addison Betances ◽  
Michael A. Temple
Keyword(s):  
Discriminant Analysis ◽  
Phase Shift ◽  
Rejection Rate ◽  
Phase Shift Keying ◽  
Multiple Discriminant Analysis ◽  
Network Protection ◽  
Quadrature Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying ◽  
Network Device

This work provides development of Constellation Based DNA (CB-DNA) Fingerprinting for use in systems employing quadrature modulations and includes network protection demonstrations for ZigBee offset quadrature phase shift keying modulation. Results are based on 120 unique networks comprised of seven authorized ZigBee RZSUBSTICK devices, with three additional like-model devices serving as unauthorized rogue devices. Authorized network device fingerprints are used to train a Multiple Discriminant Analysis (MDA) classifier and Rogue Rejection Rate (RRR) estimated for 2520 attacks involving rogue devices presenting themselves as authorized devices. With MDA training thresholds set to achieve a True Verification Rate (TVR) of TVR = 95% for authorized network devices, the collective rogue device detection results for SNR ≥ 12 dB include average burst-by-burst RRR ≈ 94% across all 2520 attack scenarios with individual rogue device attack performance spanning 83.32% < RRR < 99.81%.

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