Construction of Rectangular Window Linear Time Verient Filter for Noise Concellation Using FRFT
Journal Title: International Journal of Electronics Communication and Computer Technology - Year 2014, Vol 4, Issue 1
Abstract
The Direct sequence spread spectrum concepts are important for achieving better performance of communication systems. The suppression of interference noise present in the spread spectrum communication systems is essential for achieving the specified system performance. Most of the existing interference suppression methods do not perform well for non stationary signals in the present paper Interference suppression schemes based on orthogonal time-frequency decomposition, wavelets and arbitrary time-frequency signals have been considered. These methods often reduce interference substantially; however their performance depends on mathematical modeling for minor changes in interference characteristics such as the center frequency. By using rectangular window methods for fractional Fourier transform with blind interference excision scheme appears promising for mitigating time-frequency induced interference. Simulations of narrowband interference are compared with the performance of the linear time variant filter. The filter performance is evaluated with existing fractional Fourier transform (FRFT) techniques for different Jamming-to-Signal Ratios (JSR) starting from 20 dB to 100 dB in steps of 10 dB. The Simulation results of the proposed synthetic model algorithm shows that there is considerable improvement in Signal-to-Noise Ratio (SNR) and better interference suppression with rectangular FRFT filtering of the DS-SS signal.
Authors and Affiliations
N. Murugendrappa| Department of electronics, Jnana Sahyadri, Kuvempu University, Shankaraghatta Shivmogga,India, Dr. A. G Ananth| RV center for Cognitive Technologies RVCE Campus, Bangalore Karanataka ,India
Baysian Imaging Concepts for Smart Fracture Detection in X-Ray Images
X-ray imaging is a traditional method for detecting fracture for ages. This project paves way for enhancement rather than replacement of the existing technology. It is a step towards thinking beyond digitization of X-ray...
Analysis of Motoring and Generating Operation Through Vector Control Induction Machine Drive
This paper presents a wide Range of acceptability of model for different values of load and for various types and ratings of induction motor. The uniqueness of the model lies on deviation. Due to changes in reference ste...
Area-Efficient and High Speed ML MAP Processor Design Using DB/SB Decoding Technique
In communication systems, specifically wireless mobile communication applications, Size and Speed are dominant factors while meeting the performance requirements. Turbo codes play an important role in such practical app...
Efficient Implementation of Low Density Parity Check (LDPC) Decoder In VLSI
The best error-correcting performance can be achieved by using non-binary low-density parity check (NB-LDPC) codes. This can be of reduced decoding complexity with high cost efficiency and is mostly preferable than binar...
Voice Based Elderly Assistance Using Wireless Technology
The voice controlled wheel robot system needs to make use of the latest technological components available. In this paper, we present the design and implementation of a voice based wheel chair system where communication...