Design and simulation of Orthogonal Frequency Division Multiplexing transceiver system using Differential Phase Shift Keying (DPSK) for Wireless Local Area Network

2010 ◽  
Author(s):  
H. A. Rahim ◽  
N. S. Murthy ◽  
F. A. Malek ◽  
R. B. Ahmad ◽  
A. S. M. Zain
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Frequency Division ◽  
Phase Shift Keying ◽  
Differential Phase Shift ◽  
Differential Phase Shift Keying ◽  
Shift Keying

Performance Enhancement of 10 Gbps OCDMA Networks Using DPSK and DQPSK with Unique Code-Sequence

2014 ◽  
Vol 974 ◽  
pp. 274-281
Author(s):  
Go Yun Ii ◽  
Thio Tzer Hwai Gilbert ◽  
K. Dimyati
Keyword(s):  
Phase Shift ◽  
Performance Enhancement ◽  
Transmission Rate ◽  
Area Network ◽  
Phase Shift Keying ◽  
Differential Phase Shift ◽  
Metropolitan Area Network ◽  
Differential Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying

This paper demonstrates the achievable performance enhancement in a multi-user network using optical unique code sequences. The study is conducted in a four-user Metropolitan Area Network (MAN) with a transmission rate of 10 Gbps. This paper investigates the feasibility of implementing Differential Phase Shift Keying (DPSK) and Differential Quadrature Phase Shift Keying (DQPSK) technique to replace conventional techniques such as On-Off Keying (OOK) and Amplitude Shift Keying (ASK). The performance of the integrated formulation of optical unique code sequenceswith DPSK and DQPSKtechnique is evaluated by determining the Bit Error Rate (BER) for various configurations and transmission distances up to 100 km.

Design of Multichannel Optical OFDM System Using Advanced Modulation Techniques

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Gurjit Kaur ◽  
Ashwini Kumar ◽  
Yaman Parasher ◽  
Prabhjot Singh
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Single Channel ◽  
Research Work ◽  
Phase Shift Keying ◽  
Ofdm System ◽  
Multichannel System ◽  
Differential Phase Shift ◽  
Power Efficient ◽  
Differential Phase Shift Keying ◽  
Shift Keying

AbstractExisting single-channel orthogonal frequency division multiplexing (OFDM) system can transmit data from single source to single destination occupying the entire link but bit error rate (BER) provided by these systems is quite high. The multichannel system gives the liberty to route the traffic through the different channels depending upon the availability. So there is a need to design a multichannel system which can transmit the data at higher rate by transmitting multiple symbols simultaneously with improved BER. So, in this research work, we propose a multichannel OFDM system by using an advanced modulation technique, i. e. quadrature amplitude modulation which not only improves the capacity but also makes the system power efficient. In order to demonstrate that our proposed system is power efficient, a set of simulations have been performed. Results show that BER (as a function of power) obtained for the proposed system is low in comparison to the already existed phase shifting keying- and differential phase shift keying-based system.

scholarly journals Analisis Pengaruh Reduksi Peak to Average Power Ratio (PAPR) dengan Teknik Selected Mapping (SLM) Terhadap Efisiensi Spektrum pada Sistem OFDM

Jurnal INFORM ◽  
2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Walid Maulana Hadiansyah ◽  
Masfiyatul Hikmiyah ◽  
Yoedy Moegiharto ◽  
Ida Anisah
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Average Power ◽  
Local Area ◽  
Area Network ◽  
Power Ratio ◽  
Digital Subscriber Line ◽  
Asymmetric Digital Subscriber Line ◽  
High Power Amplifier

Teknologi Orthogonal Frequency Division Multiplexing (OFDM) telah banyak diimplementasikan dalam komunikasi digital berkecepatan tinggi seperti Wireless Local Area Network (WLAN), Digital Audio Broadcasting (DAB), Digital Video Broadcasting (DVB), dan Asymmetric Digital Subscriber Line (ADSL). Salah satu kelemahan dari sistem OFDM adalah tingginya nilai Peak to Average Power Ratio (PAPR) yang menyebabkan terjadinya distorsi non linier pada High Power Amplifier (HPA). Akibatnya, terjadi penurunan efisiensi spektrum. Teknik reduksi PAPR yang digunakan pada karya tulis ini adalah teknik Selected Mapping (SLM) dan SLM Riemann. Hasil simulasi digambarkan dengan kurva Cumulative Complementary Distribution Function (CCDF) dan kurva efisiensi spektrum. Parameter yang digunakan yaitu jumlah subblok dan jumlah subcarrier. Pada penelitian ini, teknik SLM menghasilkan nilai PAPR sebesar 8.912 dB sedangkan teknik SLM Riemann menghasilkan nilai PAPR sebesar 9.099 dB. Sehingga teknik SLM dapat mereduksi nilai PAPR lebih baik dibandingkan dengan teknik SLM Riemann. Perbedaan jumlah subblok juga mempengaruhi kinerja teknik reduksi, teknik SLM dengan subblok 8 menghasilkan kinerja 0.5 dB lebih baik dibandingkan subblok 4. Sehingga kinerja akan semakin baik apabila jumlah subblok yang digunakan semakin banyak. Kemudian semakin banyak jumlah subcarrier maka nilai PAPR yang dihasilkan akan semakin besar. Selanjutnya, efisiensi spektrum meningkat seiring bertambahnya daya transmit. Teknik reduksi SLM dan SLM Riemann mampu meningkatkan daya transmit yang juga menyebabkan meningkatnya efisiensi spektrum. Penggunaan jumlah subblok yang lebih banyak akan meningkatkan efisiensi spektrum. Teknik SLM dengan subblok 4 menghasilkan efisiensi spektrum sebesar 0.425 bit/s/Hz dan subblok 8 menghasilkan efisiensi spektrum sebesar 0.444 bit/s/Hz. Teknik reduksi SLM memberikan hasil efisiensi spektrum yang lebih baik dari teknik reduksi SLM Riemann.

scholarly journals Analysis of a framework implementation of the transceiver performances for integrating optical technologies and wireless LAN based on OFDM-RoF

2020 ◽  
Vol 10 (4) ◽  
pp. 4252
Author(s):  
Adnan Hussein Ali ◽  
Alaa Desher Farhood ◽  
Maham Kamil Naji
Keyword(s):  
Optical Fibers ◽  
Wireless Lan ◽  
Orthogonal Frequency Division Multiplexing ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Systems Design ◽  
Local Area ◽  
Area Network ◽  
Optical Wireless ◽  
Communication Tool

The greatest advantages of optical fibers are the possibility of extending data rate transmission and propagation distances. Being a multi-carrier technique, the orthogonal frequency division multiplexing (OFDM) can be applicable in hybrid optical-wireless systems design owing to its best spectral efficiency for the interferences of radio frequency (RF) and minor multi-path distortion. An optical OFDM-RoF-based wireless local area network (W-LAN) system has been studied and evaluated in this work. The outline for integrating an optical technology and wireless in a single system was provided with the existence of OFDM-RoF technology and the microstrip patch antenna; these were applied in the Optisystem communication tool. The design of the proposed OFDM-RoF system is aimed at supporting mm-wave services and multi-standard operations. The proposed system can operate on different RF bands using different modulation schemes like 4,16 and 64QAM, that may be associated to OFDM and multidata rates up to 5 Gbps. The results demonstrate the robustness of the integrated optical wireless link in propagating OFDM-RoF-based WLAN signals across optical fibers.

Link-Level Simulator for Wireless local Area Network

2018 ◽  
Vol 6 (7) ◽  
pp. 314
Author(s):  
Chaithra. H. U ◽  
Vani H.R
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area Networks ◽  
Local Area ◽  
Long Term Evolution ◽  
Wireless Local Area Networks ◽  
Area Network ◽  
Network Simulator ◽  
Term Evolution

Now a days in Wireless Local Area Networks (WLANs) used in different fields because its well-suited simulator and higher flexibility. The concept of WLAN  with  advanced 5th Generation technologies, related to a Internet-of-Thing (IOT). In this project, representing the Network Simulator (NS-2) used linked-level simulators for Wireless Local Area Networks and still utilized IEEE 802.11g/n/ac with advanced IEEE 802.11ah/af technology. Realization of the whole Wireless Local Area Networking linked-level simulators inspired by the recognized Vienna Long Term Evolution- simulators. As a outcome, this is achieved to link together that simulator to detailed performances of Wireless Local Area Networking with Long Term Evolution, operated in the similar RF bands. From the advanced 5th Generation support cellular networking, such explore is main because different coexistences scenario can arise linking wireless communicating system to the ISM and UHF bands.

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