scholarly journals Performance of FSO Communication Systems Employing Alamouti-Type Space-Time Encoding over Malaga Channels with Pointing Errors

2022 ◽  
pp. 1-1
Abdulgani A. Ibrahim ◽  
Serdar Ozgur Ata ◽  
Lutfiye Durak-Ata
2018 ◽  
Vol 7 (2.21) ◽  
pp. 131
C Padmaja ◽  
B L. Malleswari

The concatenation of channel coding and diversity schemes are essential in the 4G communication systems to improve the reliable data rate transmission. To address Bit Error Rate performance enhancement, the paper presents the coding gain and diversity gain benefits using the proposed CTSTC scheme by adding modified Turbo features and Space Time encoding features. Simulation results of are provided using MATLAB and compared the results with convolutional coded Space Time Coding technique.  

2018 ◽  
Vol 7 (3.8) ◽  
pp. 111
Satwinder Kaur ◽  
Lavish Kansal ◽  
Gurjot Singh Gaba ◽  
Mohannad A. M. Al-Ja'afari

Diverse methodologies of encoding schemes like space-time block codes (STBC), orthogonal space-time block codes (OSTBC) &quasi-orthogonal space-time block codes (QOSTBC) are being proposed as alternatives of basic Alamouti space-time encoding scheme for multiple input multiple output (MIMO) scheme for existing wireless communication systems. Since filter bank multi-carrier (FBMC) scheme is an integral part of the 5th generation (5G) cellular systems, the performance of these schemes needs to be investigated for FBMC methodology also. Alamouti and Space-time block codes are widely used in MIMO system because of their ability to achieve full diversity and the different channels are used at the receiver. In this work, we proposed different approaches for the bit error rate (BER) of Alamouti, STBC3, and STBC4 in FBMC. These approaches are based on the type of space-time encoding and number of receiving antennas being used for each space time encoding scheme for analyzing the MIMO-FBMC. Moreover, we also investigation the performance of these proposed MIMO schemes over Rayleigh and additive white Gaussian noise (AWGN) channel and compared it with the performance of BER or signal to noise ratio (SNR) of different channels.

2017 ◽  
Vol 38 (3) ◽  
Mehtab Singh

AbstractInter-satellite communication links are very crucial between satellites orbiting around the earth in order to transmit information between them and also for the purpose of data relaying from one satellite station to other stations and ground stations. Inter-satellite optical wireless communication (IsOWC) links involve the application of optical wireless signals as compared to radio frequency signals used in traditional satellite communication systems. One of the major problems leading to the performance degradation of IsOWC link is the signal degradation due to satellite vibrations also known as pointing errors. In this paper, the performance of an IsOWC communication link has been investigated for different system parameters such as data transmission rates, antenna aperture diameter, transmission power levels, operating wavelength and responsivity of photodiode by analyzing

2016 ◽  
Vol 45 (6) ◽  
pp. 0622003
王惠琴 Wang Huiqin ◽  
肖博 Xiao Bo ◽  
孙剑锋 Sun Jianfeng ◽  
贾非 Jia Fei ◽  
曹明华 Cao Minghua

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