scholarly journals High Real-Time Design of Digital Pulse Compression Based on FPGA

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Xiujie Qu ◽  
Cuimei Ma ◽  
Shixin Zhang ◽  
Sitong Lian
Keyword(s):  
Real Time ◽  
Processing Speed ◽  
Pulse Compression ◽  
Fourier Transforms ◽  
Experimental Result ◽  
Parallel Structure ◽  
Time Performance ◽  
Fft Processor ◽  
Digital Pulse ◽  
Floating Point Computation

Because of the poor real-time performance of in-place fast Fourier transforms, a reconfigurable radix-4 FFT processor is studied and designed, which is based on decimation-in-time and single floating-point computation. The proposed method adopts “pipeline and parallel” structure for accessing multiple memories to improve the FFT processing speed, and then it is applied to digital pulse compression. The experimental result shows that the proposed FFT based on radix-4 computation can implement digital pulse compression rapidly under no adding hardware resources. The proposed method can be also applied to other radix FFTs.

The Implement of a Linux Database Data Processing Mechanism Based on Cache

2014 ◽  
Vol 989-994 ◽  
pp. 4447-4451
Author(s):  
Yong Jun Zhang ◽  
Chun Hui Li
Keyword(s):  
Data Processing ◽  
Real Time ◽  
Processing Speed ◽  
Simple Structure ◽  
Equipment Management ◽  
The Real ◽  
Time Performance ◽  
Data Process ◽  
Processing Mechanism ◽  
Easy Operation

Although the simple structure and easy operation of completing data process depending only on the real-time request of database, the database call time is far longer than the lookup time. If the database is called too frequently, the processing speed will surely be cut down and the real-time performance will be degraded. Based on the situation, this paper will put forward one method, which combined cache with database can improve the performance of the system in the main controller of integrated security system of equipment management.

Research on Function Real-Time of Substation Automation System Based on IEC61850

2013 ◽  
Vol 765-767 ◽  
pp. 2021-2025
Author(s):  
Xian Pei Wang ◽  
Qi Lin Zhang ◽  
Yong Biao Zhao
Keyword(s):  
Real Time ◽  
Network Structure ◽  
Processing Speed ◽  
Simulation Models ◽  
Automation System ◽  
Time Performance ◽  
Performance Of Systems ◽  
Communication Events ◽  
Distribution Mode ◽  
Substation Automation

The function real-time of substation automation system based on IEC61850 depends on the distribution mode of logical nodes, the processing speed of logical nodes and the communication delay between logical nodes.The realization principles of functions free distribution are introduced based on IEC61850, take bus protection function and distributed interlock function examples, the functions are deposed into the connection diagram of logical nodes and their communication events are introduced in great detail. The simulation models of D2 substation which has unified network or two-tier network are established with OPNET. The communication events of bus bar protection function and distributed interlock function are simulated and analyzed based on this mode. The rationality of distribution mode of systems functions is quantitative analyzed which provide guidance to improve the real-time performance of systems functions and network structure.

An Improved Background Update Algorithm and Application in Traffic Engineering

2014 ◽  
Vol 620 ◽  
pp. 228-232
Author(s):  
Shi Song Zhu ◽  
Hai Yan Zhang ◽  
Cui Yun Zhang ◽  
Hong Jin Zhu
Keyword(s):  
Real Time ◽  
Traffic Engineering ◽  
Experimental Result ◽  
Improved Method ◽  
Time Performance ◽  
Background Updating ◽  
Permissible Range ◽  
The Common ◽  
Background Update ◽  
Statistical Background

The statistical histogram algorithm is one of the common background update algorithms. Considering the statistical histogram algorithm disadvantages of large complex computation, the paper proposes an improved method named fixed window statistical background updating algorithm. The algorithm sets a window which contains N records for each pixel point firstly, every record records value in the permissible range of error and the number of pixel point occurrence, and then counting pixel values for every record through statistical histogram algorithm. When the window is full, the new pixel values will replace the smaller counting, while the pixel which counting larger will be adaptively updated by adaptive background updating formula. The experimental result shows that this method has a high real-time performance and robustness in background updating.

scholarly journals An Improved 3D Registration Method of Mobile Augmented Reality for Urban Built Environment

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Yong Wu ◽  
Weitao Che ◽  
Bihui Huang
Keyword(s):  
Augmented Reality ◽  
Built Environment ◽  
Real Time ◽  
Smart Phone ◽  
Experimental Result ◽  
3D Registration ◽  
Registration Method ◽  
Time Performance ◽  
Building Recognition ◽  
Mobile Ar

3D registration plays a pivotal role in augmented reality (AR) system. The existing methods are not suitable to be applied directly in the mobile AR system for the built environment, with the reasons of poor real-time performance and robustness. This paper proposes an improved 3D registration method of mobile AR for built environment, which is based on SURFREAK and KLT. This method increases the building efficiency of algorithm descriptors and maintains the robustness of the algorithms. To implement and evaluate the registration method, a smart phone-based mobile AR system for built environment is developed. The experimental result shows that the improved method is endowed with higher real-time performance and robustness, and the mobile AR 3D registration can realize a favorable performance and efficiency in the complex built environment. The mobile AR system could be used in building recognition and information augmentation for built environment and further to facilitate location-based games, urban heritage tourism, urban planning, and smart city.

Real-time Performance Monitoring of MPC Based on Covariance Index Prediction

2014 ◽  
Vol 39 (5) ◽  
pp. 658-663 ◽  
Author(s):  
Xue-Min TIAN ◽  
Ya-Jie SHI ◽  
Yu-Ping CAO
Keyword(s):  
Real Time ◽  
Performance Monitoring ◽  
Time Performance
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