scholarly journals MIMO BASED HIGH SPEED OPTICAL FIBER COMMUNICATION SYSTEM

2019 ◽  
Vol 2019 (02) ◽  
pp. 107-116
Author(s):  
Karrupusamy P.
Keyword(s):  
Optical Fiber ◽  
Communication System ◽  
High Speed ◽  
Transmission Rate ◽  
Signal Transmission ◽  
Multiple Input Multiple Output ◽  
Optical Fiber Communication ◽  
60 Ghz ◽  
Fiber System ◽  
Differential Phase Shift

As the telecommunication services totally relies on the optical fiber for extending communications, it necessary that the optical communication system be capable of handling high speed, multiple channels and long haul signal transmission. recently the emergence of the optical coherent 100 GB/s and the digital signal processing has made possible the perfect signal transmission even for the MIMO (multiple input multiple output system) as they are well reformed to permit multiple wireless signal that holds different carrier frequencies. So the optical fiber system has become prominent among the applications like, large universities, banks and other private networks. However the speed in the transmission of the multiple wireless signals through single cable experiences performance issues in terms of speed, so the proposed method utilizes the 60 GHz, radio over fiber MIMO with effective spectrum allocation and the return zero differential phase shift keying to improve the communication speed and suppress the crosstalk respectively. The proposed system enriches the seamless communication with the QPSK-OFDM MIMO channels achieving 85 % in the data transmission rate, reducing the error correction rate to 5%.

Loss Characteristics Analysis and Optimization of an Off-Axis Rotary Optical Fiber Communication System

2014 ◽  
Vol 596 ◽  
pp. 788-793 ◽  
Author(s):  
Xiao Hua Wang ◽  
Qian Zhao ◽  
Li Li ◽  
Jie Ding ◽  
Qiu Xin Zheng ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Communication System ◽  
High Speed ◽  
Optical Fiber Communication ◽  
Fiber Communication ◽  
Experiment Platform ◽  
Optical Fiber Communication System ◽  
Characteristics Analysis ◽  
Fiber Collimator ◽  
The Stability

The losses of the off-axis rotary optical fiber communication system were derived from optical fiber coupling, three kinds of misalignments between optical fiber collimators (Axial separation Z0, lateral offset X0, angular tilting θ), incomplete alignment of optical fiber collimator during rotation and system tremble caused by high speed rotating. Some measures were taken to reduce the loss. The thermally expanded core fiber collimator cut down the influence of axial separation and angular tilting. The position of the optical fiber collimator on the flange was adjusted and infrared right angle prisms were installed to reduce the losses during rotation of the system. In addition, improving the precision and optimizing device of mechanical structure can increase the stability of the whole experiment platform and decrease the losses.

Dispersion characteristics and compensation in the POLMUX coherent optical communication system

2017 ◽  
Vol 31 (19-21) ◽  
pp. 1740054
Author(s):  
Guijun Zhu ◽  
Xiukai Ruan ◽  
Zhili Zhou
Keyword(s):  
Optical Fiber ◽  
Optical Communication ◽  
Communication System ◽  
High Speed ◽  
Polarization Mode Dispersion ◽  
Optical Fiber Communication ◽  
Dispersion Characteristics ◽  
Optical Communication System ◽  
Modulation Formats ◽  
Coherent Optical Communication

The trend of high-speed optical communication is to realize large capacity, fast speed and long haul transmission. However, the dispersion in an optical fiber link can cause signals distortion or even inter symbol interference (ISI). With increasing signal rate and transmission distance in the optical communication system, the development of high-speed optical fiber communication is restricted seriously. This paper is focusing on the dispersion characteristics and compensation of the polarization multiplexing (POLMUX) coherent optical communication system: (i) to study on dispersion theoretically, e.g., chromatic dispersion (CD), polarization mode dispersion (PMD) and dispersion tolerance; (ii) to analyze and compare the performance of dispersion with various 16-ary modulation formats; (iii) to compensate dispersion by the classical dispersion compensation methods.

scholarly journals Analisis dan Pengukuran Tanggapan Frekuensi terhadap Redaman Serat Optik

2020 ◽  
Vol 15 (2) ◽  
pp. 31
Author(s):  
Uzma Septima ◽  
Lince Markis ◽  
Ramiati - ◽  
Andi Ahmad Dahlan ◽  
Sri Nita
Keyword(s):  
Optical Fiber ◽  
Communication System ◽  
Smart Home ◽  
Optical Fiber Communication ◽  
Signal Frequency ◽  
Fiber System ◽  
Fiber Communication ◽  
Digital Devices ◽  
Input Amplitude ◽  
Optic Communication

The concept of smart home and cyber home is not the same, even much different. If a smart home or smart home is more aimed at users or home users who lead to conventional homes equipped with digital devices, the concept of cyber home is more to the bandwidth capacity of the internet to complement digital devices in the home. For this reason, Cyber Park Indonesia cooperates with PT Wika Realty. Specifically to develop the housing as a cyber home, Cyber Park Indonesia uses optical fiber. [Kompas, 2017]. This fact states that communication using optical fiber becomes very important so that to optimize the optical fiber system, a study that produces frequency responses to optical fiber attenuation parameters is made. Various sine signal frequency and amplitude values are given as input from an optical fiber dispersing system by looking at the response of the receiver in the form of voltage parameter values. The frequency values given range from 100 Hz to 10 Khz. The linkage of the input amplitude value to the damping value is an output voltage output generated by the amplitude of the amplitude parameter at the sending end. This voltage value comparison is used as the damping parameter of an optical fiber communication system. Giving this frequency will provide the performance of a fiber optic communication system. The resulting voltage value is a constant of changes in the frequency value.

scholarly journals Coded Modulation and Impairment Compensation Techniques in Optical Fiber Communication

2021 ◽  
Author(s):  
Zhipei Li ◽  
Dong Guo ◽  
Ran Gao
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
High Speed ◽  
Transmission Rate ◽  
Optical Fiber Communication ◽  
Coded Modulation ◽  
Coherent Detection ◽  
Modulation Scheme ◽  
Fiber Communication ◽  
Modulation Format

This chapter deals with coded modulation and impairment compensation techniques in optical fiber communication. Probabilistic shaping is a new coded modulation technology, which can reduce transmission power by precoding, reduce bit error rate and improve communication rate. We proposed a probabilistic shaping 16QAM modulation scheme based on trellis coded modulation. Experimental results show that this scheme can achieve better optical SNR gain and BER performance. On the other hand, in order to meet the demand of transmission rate of next generation high speed optical communication systems, multi-dimensional modulation and coherent detection are sufficiently applied. The imperfect characteristics of optoelectronic devices and fiber link bring serious impairments to the high baud-rate and high order modulation format signal, causes of performance impairment are analyzed, pre-compensation and receiver side’s DSP techniques designed for coherent systems are introduced.

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