BER analysis of synchronous fiber-optic CDMA networks with suboptimal decision threshold

2002 ◽  
Vol 32 (4) ◽  
pp. 293-296
Author(s):  
Ching-Chih Kuo ◽  
Jyh-Horng Wu
Keyword(s):  
Fiber Optic ◽  
Decision Threshold ◽  
Cdma Networks ◽  
Ber Analysis

scholarly journals Design of a new family of two-dimensional codes for fiber-optic CDMA networks

1998 ◽  
Vol 16 (4) ◽  
pp. 501-508 ◽  
Author(s):  
E.S. Shivaleela ◽  
K.N. Sivarajan ◽  
A. Selvarajan
Keyword(s):  
Fiber Optic ◽  
Two Dimensional ◽  
New Family ◽  
Cdma Networks

Nonlinear Power Control for Asynchronous Fiber-optic CDMA Networks

2006 ◽  
Author(s):  
Naser Tarhuni ◽  
Mohamed Elmusrati ◽  
Timo Korhonen
Keyword(s):  
Power Control ◽  
Fiber Optic ◽  
Cdma Networks

scholarly journals Two-dimensional optical orthogonal codes for fiber-optic CDMA networks

2005 ◽  
Vol 23 (2) ◽  
pp. 647-654 ◽  
Author(s):  
E.S. Shivaleela ◽  
A. Selvarajan ◽  
T. Srinivas
Keyword(s):  
Fiber Optic ◽  
Two Dimensional ◽  
Optical Orthogonal Codes ◽  
Orthogonal Codes ◽  
Cdma Networks

scholarly journals Threshold Detection Scheme Based on Parametric Distribution Fitting for Optical Fiber Channels

2019 ◽  
Vol 13 ◽  
Author(s):  
Mohammed Usman ◽  
Mohd Wajid ◽  
M. Z. Shamim ◽  
Mohd Dilshad Ansari ◽  
Vinit Kumar Gunjan
Keyword(s):  
Fiber Optic ◽  
Threshold Value ◽  
Visible Light Communication ◽  
Rayleigh Distribution ◽  
Decision Threshold ◽  
Distribution Fitting ◽  
Detection Mechanism ◽  
Probability Of Error ◽  
Detection Scheme ◽  
Threshold Detection

When data is transmitted by encoding it in the amplitude of the transmitted signal, such as in Amplitude Shift Keying, the receiver makes a decision on the transmitted data by observing the amplitude of the received signal. Depending on the level of the received signal, the receiver has to decode the received data, with minimum probability of error. For binary transmission, this is achieved by choosing a decision threshold. A threshold detection mechanism is evaluated in this paper, which uses parametric probability distribution fitting to the received signal. Based on our earlier work on visible light communication, the idea is extended to a fiber optic channel and it is found that in a fiber optic channel, the threshold value obtained by fitting a Rayleigh distribution to the received data results in error probability approaching zero.

Imaging and diffraction modes in Scanning Transmission Electron Microscopy

1986 ◽  
Vol 44 ◽  
pp. 684-687
Author(s):  
J. M. Cowley ◽  
R. Glaisher ◽  
J. A. Lin ◽  
H.-J. Ou
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
High Efficiency ◽  
Fiber Optic ◽  
Image Intensifier ◽  
Detector System ◽  
Detector Plane ◽  
Secondary Electrons ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Special Detector

Some of the most important applications of STEM depend on the variety of imaging and diffraction made possible by the versatility of the detector system and the serial nature, of the image acquisition. A special detector system, previously described, has been added to our STEM instrument to allow us to take full advantage of this versatility. In this, the diffraction pattern in the detector plane may be formed on either of two phosphor screens, one with P47 (very fast) phosphor and the other with P20 (high efficiency) phosphor. The light from the phosphor is conveyed through a fiber-optic rod to an image intensifier and TV system and may be photographed, recorded on videotape, or stored digitally on a frame store. The P47 screen has a hole through it to allow electrons to enter a Gatan EELS spectrometer. Recently a modified SEM detector has been added so that high resolution (10Å) imaging with secondary electrons may be used in conjunction with other modes.

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