ABSTRACT In this paper we present a blind low frequency watermarking scheme on gray level images, which is based on DCT transform and spread spectrum communications technique. We compute the…
Preamble-based SNR Estimation in Frequency Selective Channels for Wireless OFDM Systems
ABSTRACT Orthogonal frequency division multiplexing (OFDM) offers high data rates and robust performance in frequency selective channels by link adaptation utilizing information about the channel quality. A crucial parameter required…
23.Adaptive Fuzzy Filtering for Artifact Reduction in Compressed
Abstract: A fuzzy filter adaptive to both sample’s activity and the relative position between samples is proposed to reduce the artifacts in compressed multidimensional signals. For JPEG images, the fuzzy…
DEVELOPMENT OF A NOVEL VOICE VERIFICATION SYSTEM USING WAVELETS
ABSTRACT This project presents a novel voice verification system using wavelet transforms. The conventional signal processing techniques assume the signal to be stationary and are ineffective in recognizing non stationary…
ECG signal denoising and baseline wander correction based on the empirical Mode decomposition
Abstract : The electrocardiogram (ECG) is widely used for diagnosis of heart diseases. Good quality ECG are utilized by physicians for interpretation and identification of physiological and pathological phenomena. However,…
Adaptive DS-CDMA Receiver with Code Tracking in Phase Unknown Environments
In this paper, we propose and analyze a new non coherent receiver with PN code tracking for direct sequence code division multiple access (DS-CDMA) communication systems in multipath channels. We…
An Edge Guided Image Interpolation Algorithm via Directional Filtering and Data Fusion
Abstract: Preserving edge structures is a challenge to image interpolation algorithms that reconstruct a high resolution image from a low resolution counterpart. We propose a new edge-guided non-linear interpolation technique…
PAPR ANALYSIS OF DHT-PRE CODED OFDM SYSTEM FOR M-QAM
ABSTRACT : High Peak to Average Power Ratio (PAPR) is one of the major drawbacks in Orthogonal Frequency Division Multiplexing (OFDM). The High PAPR increases the complexity of Analogue to…
Compress Compound Images in H.264/MPEG-4 AVC by Fully Exploiting Spatial Correlation
ABSTRACT : Compound images consist of text, graphics and natural images, which present strong anisotropic features. It makes existing image coding standards inefficient on compressing them. To solve the problem,…
Adaptive Active Constellation Extension Algorithm for Peak-to-Average Ratio Reduction in OFDM
Abstract: For PAR reduction in OFDM systems, the clippingbased Active Constellation Extension (ACE) technique is simple and attractive for practical implementation. However, we observe it cannot achieve the minimum PAR…