RLG DITHER REMOVAL USING WAVELET TRANSFORMS
Published In: 7TH INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTING, ELECTRONICS AND ELECTRICAL TECHNOLOGY
Author(s): BHARATH REGIMANU , CH.RAJA KUMARI , KAKARLA SUBBA RAO , KISHORE CHANDRA DAS , P.NEEHARIKA
Abstract: Ring Laser Gyroscopes (RLGs) are widely used in many airborne and navigation systems for accurate measurement of the true rotation of the body movement. But the RLG’s suffer a serious problem at low frequencies known as Lock –in frequency. To avoid lock-in problem, the RLG is vibrated mechanically to a high frequency which is known as Dithering. In order to get the true rotation of the body the dither signal has to be removed. Single stage, multistage and multirate filters are suggested to remove the dither signal. These filters have the disadvantage that either the FIR filter length is too large or the phase characteristics are not linear. In this work multiresolution techniques using Wavelet Transforms (WTs) are used to remove the dither signal. Six level multi resolution analysis is carried out with various types of wavelets like Discrete Meyer and Daubechies 45 (db45) etc. With none of the standard wavelets, the original and reconstructed signals are matched. A new wavelet is desig
- Publication Date: 02-Jul-2017
- DOI: 10.15224/978-1-63248-126-9-30
- Views: 0
- Downloads: 0
TREE-BASED DIAGNOSIS MECHANISMS FOR RULE ANOMALIES AMONG INTERNET FIREWALLS
Published In: 7TH INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTING, ELECTRONICS AND ELECTRICAL TECHNOLOGY
Author(s): CHI-SHIH CHAO
Abstract: While configuring firewalls, firewall rule ordering and distribution must be done cautiously on each of cooperative firewalls. However, network operators are prone to incorrectly configuring firewalls because there are commonly hundreds of thousands of filtering rules (i.e., rules in the Access Control List file; or ACL for short) which could be set up in a firewall, not mention these rules among firewalls could affect mutually. To speed up the crucial but laboring inspection of rule configuration on firewalls, this paper describes our developed diagnosis mechanisms which can speedily figure out rule anomalies within/among firewalls with two innovative data structure – Adaptive Rule Anomaly Relationship tree (or ARAR tree) and Fixed-Stride Trie (FST), respectively. With the aid of these data structures and associated algorithms, significant improvements in this field have been made.
- Publication Date: 02-Jul-2017
- DOI: 10.15224/978-1-63248-126-9-31
- Views: 0
- Downloads: 0