Real-Time Digital Signal Processing for High-Speed Coherent Optical OFDM Synchronization

2015 ◽  
Vol 33 (11) ◽  
pp. 2294-2302 ◽  
Author(s):  
Hae Young Rha ◽  
Chun Ju Youn ◽  
Yong-Hwan Kwon ◽  
Hae-Wook Choi
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Real Time ◽  
High Speed ◽  
Digital Signal ◽  
Optical Ofdm ◽  
Ofdm Synchronization

An optimum parallel architecture for high-speed real-time digital signal processing

Computer ◽  
10.1109/2.18 ◽  
1988 ◽  
Vol 21 (2) ◽  
pp. 47-57 ◽  
Author(s):  
G.R. Lang ◽  
M. Dharssi ◽  
F.M. Longstaff ◽  
P.S. Longstaff ◽  
P.A.S. Metford ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Real Time ◽  
High Speed ◽  
Parallel Architecture ◽  
Digital Signal

scholarly journals Generation of optical OFDM signals using 214 GS/s real time digital signal processing

2009 ◽  
Vol 17 (20) ◽  
pp. 17658 ◽  
Author(s):  
Yannis Benlachtar ◽  
Philip M. Watts ◽  
Rachid Bouziane ◽  
Peter Milder ◽  
Deepak Rangaraj ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Real Time ◽  
Digital Signal ◽  
Optical Ofdm ◽  
Ofdm Signals

scholarly journals An efficient hardware logarithm generator with modified quasi-symmetrical approach for digital signal processing

2020 ◽  
Vol 10 (5) ◽  
pp. 4671
Author(s):  
Minh-Hong Nguyen
Keyword(s):  
Signal Processing ◽  
Error Analysis ◽  
Digital Signal Processing ◽  
Real Time ◽  
High Speed ◽  
Hardware Implementation ◽  
Approximation Error ◽  
Digital Signal ◽  
Traditional Methods ◽  
Low Area

This paper presents a low-error, low-area FPGA-based hardware logarithm generator for digital signal processing systems which require high-speed, real time logarithm operations. The proposed logarithm generator employs the modified quasi-symmetrical approach for an efficient hardware implementation. The error analysis and implementation results are also presented and discussed. The achieved results show that the proposed approach can reduce the approximation error and hardware area compared with traditional methods.

scholarly journals Three-Axis Inductive Displacement Sensor Using Phase-Sensitive Digital Signal Processing for Industrial Magnetic Bearing Applications

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 115
Author(s):  
Teemu Sillanpää ◽  
Alexander Smirnov ◽  
Pekko Jaatinen ◽  
Jouni Vuojolainen ◽  
Niko Nevaranta ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Eddy Current ◽  
High Speed ◽  
Digital Signal ◽  
Magnetic Bearing ◽  
Air Gap ◽  
Sensor Design ◽  
Quadrature Demodulation ◽  
Displacement Sensors

Non-contact rotor position sensors are an essential part of control systems in magnetically suspended high-speed drives. In typical active magnetic bearing (AMB) levitated high-speed machine applications, the displacement of the rotor in the mechanical air gap is measured with commercially available eddy current-based displacement sensors. The aim of this paper is to propose a robust and compact three-dimensional position sensor that can measure the rotor displacement of an AMB system in both the radial and axial directions. The paper presents a sensor design utilizing only a single unified sensor stator and a single shared rotor mounted target piece surface to achieve the measurement of all three measurement axes. The sensor uses an inductive measuring principle to sense the air gap between the sensor stator and rotor piece, which makes it robust to surface variations of the sensing target. Combined with the sensor design, a state of the art fully digital signal processing chain utilizing synchronous in-phase and quadrature demodulation is presented. The feasibility of the proposed sensor design is verified in a closed-loop control application utilizing a 350-kW, 15,000-r/min high-speed industrial induction machine with magnetic bearing suspension. The inductive sensor provides an alternative solution to commercial eddy current displacement sensors. It meets the application requirements and has a robust construction utilizing conventional electrical steel lamination stacks and copper winding.

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