Robust MMSE Beamforming of Downlink Multi-User MISO Systems in the Presence of Beam Pointing Error

2021 ◽  
Author(s):  
Xiaoyu Cao ◽  
Yuan Zhang ◽  
Peng Du
Keyword(s):  
Pointing Error

Performance analysis of MRR FSO communication system under Gamma-Gamma turbulence channel with pointing error

2021 ◽  
pp. 126891
Author(s):  
Basel Mounir El Saghir ◽  
Mohamed Bakry El Mashade ◽  
Ashraf Mohamed Aboshosha
Keyword(s):  
Performance Analysis ◽  
Communication System ◽  
Pointing Error

Impact of Pointing Error on the BER Performance of an OFDM Optical Wireless Communication Link over Turbulent Condition

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Bobby Barua ◽  
S. P. Majumder
Keyword(s):  
Noise Analysis ◽  
Data Rate ◽  
Channel Noise ◽  
Communication Link ◽  
Optical Wireless ◽  
Power Penalty ◽  
Major Power ◽  
Pointing Error ◽  
Turbulent Condition ◽  
Ber Performance

AbstractAn analytical approach is developed in this paper to evaluate the bit error rate (BER) performance of an optical wireless (OW) communication system with multiplexing of the RF orthogonal frequency division (OFDM) over turbulent condition taking into account the effect of pointing error. The received signal is detected through direct detection receiver followed by RF synchronous demodulation including the effect of OW channel and different form of noises such as receiver thermal noise, background channel noise and photo detector shot noise. Analysis is developed for an OFDM system over the OW channel, taking into account the effect of pointing error between the transmitter and the receiver in turbulent condition and the analysis reveals that the OFDM OW system is less affected by pointing error with deference to the major power penalty at BER performance. For instance, power penalty at BER 10−9 is found to be 3 dB for 256 OFDM subcarriers with 9 millidegree displacement angle at a data rate of 10 Gbps under turbulent condition. It is found that the system is more influenced by the atmospheric turbulence at a higher data rate.

Pointing error analysis of Risley-prism-based beam steering system

2014 ◽  
Vol 53 (25) ◽  
pp. 5775 ◽  
Author(s):  
Yuan Zhou ◽  
Yafei Lu ◽  
Mo Hei ◽  
Guangcan Liu ◽  
Dapeng Fan
Keyword(s):  
Error Analysis ◽  
Beam Steering ◽  
Steering System ◽  
Pointing Error

Impact of Various Parameters on the Performance of Inter-aircraft Optical Wireless Communication Link

2017 ◽  
Vol 39 (1) ◽  
Author(s):  
Mehtab Singh
Keyword(s):  
Wireless Communication ◽  
Transmission Rate ◽  
Power Level ◽  
Communication Link ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Antenna Aperture ◽  
Aperture Diameter ◽  
Pointing Error ◽  
The Impact

AbstractOptical wireless communication (OWC) systems also known as Free space optics (FSO) are capable of providing high channel bandwidth, high data transmission rates, low power consumption, and high security. OWC links are being considered in different applications such as inter-satellite links, terrestrial links, and inter-aircraft communication links. This paper investigates the impact of different system parameters such as transmission power level, operating wavelength, transmitter pointing error angle, bit transmission rate, atmospheric attenuation, antenna aperture diameter, geometric losses, the responsivity of the photodetector, and link range on the performance of inter-aircraft optical wireless communication link.

Performance analysis of RF-FSO communication systems over the Málaga distribution channel with pointing error

Optik ◽  
2021 ◽  
Vol 247 ◽  
pp. 167891
Author(s):  
Vineeth Palliyembil ◽  
Jagadeesh Vellakudiyan ◽  
Palanivel Muthuchidambaranathan
Keyword(s):  
Performance Analysis ◽  
Communication Systems ◽  
Distribution Channel ◽  
Pointing Error

Effect of adverse weather conditions and pointing error on the performance of 2-D WH/TS OCDMA over FSO link

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Bithi Mitra ◽  
Md. Jahedul Islam
Keyword(s):  
Free Space ◽  
Atmospheric Condition ◽  
Optical Power ◽  
Weather Conditions ◽  
Free Space Optical ◽  
Central Wavelength ◽  
Pointing Error ◽  
Adverse Weather ◽  
Code Division Multiple ◽  
Ber Performance

AbstractIn this paper, the performance of two-dimensional (2-D) wavelength-hopping/time-spreading (WH/TS) optical code division multiple access (OCDMA) system over free space optical (FSO) channel is analyzed in the presence of pointing error and different weather conditions. Prime code scheme is employed for both wavelength-hopping and time-spreading to address user code-matrix. The operating central wavelength of 1550 nm is considered to demonstrate the bit error rate (BER) performance of the proposed system as a function of various system parameters. The required optical power of the proposed system is determined to maintain a BER value of 10−9. The numerical evaluation interprets that the BER performance is highly dependent on transmission length, transmitted power, pointing error angle as well as the number of simultaneous user. It is also observed that the 2-D OCDMA system over free space needs minimum required optical power in case of rainy atmospheric condition, but it is maximum for foggy atmospheric condition.

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