This paper proposes an advanced MIMO-OFDM reconfigurable architecture along with companding transform. The reconfigurable architecture uses switching algorithm between MIMO diversity and special multiplexing which allows selecting the MIMO configuration and improves the BER. The major drawback of orthogonal frequency division multiplexing (OFDM) system is peak to average power ratio (PAPR). Man...

Widely used higher-dimensional Fourier transform (FT) NMR spectroscopy suffers from two major drawbacks: (i) The minimal measurement time of an N-dimensional FT NMR experiment, which is constrained by the need to sample N - 1 indirect dimensions, may exceed by far the measurement time required to achieve sufficient signal-to-noise ratios. (ii) The low resolution in the indirect dimensions sever...

Steganography is the art and science of covert communication. The secret information can be concealed in content such as image, audio, or video. This paper provides a novel image steganography technique to hide both image and key in color cover image using Discrete Wavelet Transform (DWT) and Integer Wavelet Transform (IWT). There is no visual difference between the stego image and the cover im...

An image compression system based on transform coding and zonal sampling is presented. It is based on the wellknown Chen-Smith coder, but with an improved technique for transform coefficient quantization and the replacement of the discrete cosine transform (DCT) by the lapped orthogonal transform (LOT). The system leads to signal-to-noise ratios that are from 1.5 to 2.0 dB above those obtained ...

Abstract— In this paper we propose an effective, robust and imperceptible video watermarking algorithm by applying DWT (Discrete Wavelet transform) on video frames. The video frames will be first decomposed using DWT and the binary watermark will be embedded in the wavelet coefficients. The experimental results demonstrate that the propose algorithm can produce watermarked contents in good visu...

We perform a comprehensive comparison between terahertz ~THz! time-domain spectroscopy and conventional far-infrared Fourier transform spectroscopy, including radiation source, detector, signal to noise ratio, bandwidth, availability, applications, and their own uniqueness. In terms of signal to noise ratio, THz time-domain spectroscopy is advantageous at low frequencies under 3 THz, while Four...

The objective of this paper is to evaluate a set of wavelets for image compression. Image compression using wavelet transforms results in an improved compression ratio. Wavelet transformation is the technique that provides both spatial and frequency domain information. These properties of wavelet transform greatly help in identification and selection of significant and non-significant coefficie...

We examine the effects of the limited size, mean value and aspect ratio of datasets when applying the Radon Transform technique for the detection of alignments. We also introduce a Radon Transform equivalent to the Bartlett Periodogram approach, which has the advantage of improving the RT spectral estimates and can mitigate the aspect ratio problem. This technique is applied for the first time,...

To effectively utilize the storage capacity, digital image compression has been applied to numerous science and engineering problems. There are two fundamental image compression techniques, either lossless or lossy. The former employs probabilistic models for lossless storage on a basis of statistical redundancy occurred in digital images. However, it has limitation in the compression ratio and...

Classification of breast tumors via dynamic contrast-enhanced magnetic resonance imaging is an important task for tumor diagnosis. In this paper, we present an approach for automatic tumor segmentation, feature generation and classification. We apply fuzzy c-means on co-occurrence texture features to generate discriminative features for classification. High-frequency information is removed via ...