Wireless optical communication channel modeling and error control based on LDPC codes

2012 ◽  
Author(s):  
Xiaorong Gao ◽  
Pei Wang ◽  
Jianqiang Guo ◽  
Jinlong Li ◽  
Kai Yang ◽  
...  
Keyword(s):  
Optical Communication ◽  
Error Control ◽  
Communication Channel ◽  
Ldpc Codes ◽  
Channel Modeling ◽  
Wireless Optical Communication ◽  
Optical Communication Channel

Error Correction Based on LDPC Codes in Wireless Optical Communication

2013 ◽  
Vol 380-384 ◽  
pp. 3811-3814
Author(s):  
Xiao Rong Gao ◽  
Pei Wang ◽  
Jian Qiang Guo ◽  
Jin Long Li ◽  
Kai Yang ◽  
...  
Keyword(s):  
Error Correction ◽  
Optical Communication ◽  
Error Rate ◽  
Error Control ◽  
Channel Model ◽  
Ldpc Codes ◽  
Atmospheric Environment ◽  
Atmospheric Scattering ◽  
Wireless Optical Communication ◽  
Beam Expander

Complex atmospheric environment seriously affect the quality of wireless of information transmission. In order to improve the wireless optical communication quality, and reduce the influence of attenuation, flicker, angle misalignment caused by atmospheric scattering, absorption, turbulence, beam expander, mismatch, atmospheric channel model is established while coding techniques for error control in wireless optical communication was researched into.The improvement result of error rate by error correction coding in different SNR situations was obtained. The results showed that the LDPC coding can significantly reduce the BER. For Gaussian channel, SNR can be reduced 8 dB when BER is 10-6; For wireless optical communication , LDPC codes can make the error rate reduced by 4-5 orders of magnitude.

WIRELESS OPTICAL COMMUNICATION CHANNEL IN THE HYDROSPHERE AS AN ALTERNATIVE OF COMMUNICATION BY CABLE

2021 ◽  
pp. 63-66
Author(s):  
В.Л. Мартынов ◽  
А.С. Голосной ◽  
С.М. Сергеев
Keyword(s):  
Optical Communication ◽  
Information Exchange ◽  
Communication Channel ◽  
Underwater Vehicles ◽  
Control Technique ◽  
Laser Communication ◽  
Wireless Optical Communication ◽  
Optical Communication Channel

В качестве альтернативы кабелю, авторами предложена методика управления с применением лазерной связи. Предлагаемые авторами решения позволят расширить возможности обмена информацией в гидросфере между подводными аппаратами. As an alternative to the cable, the authors have proposed a control technique based on the use of laser communication. The solutions proposed by the authors will expand the possibilities of information exchange in the hydrosphere between underwater vehicles.

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