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This paper proposes a novel look-up table based chaotic encryption scheme suitable for securing audio signals using a simple two dimensional nonlinear map. In the proposed method, we use a single chaotic trajectory whose period is equal to 65536. The iterated solutions of the chosen map are sorted in ascending order and indexed to create a look-up table.(More)
Gene Expression is the process by which a gene’s coded information is translated into the proteins present and operating in the cell. Changes in gene expression are associated with many important biological phenomena, including morphogenesis and aging, cancer and disease states, and adaptive responses to the environment. The advent of high density(More)
An elementary combinatorial construction for a family of Low Density Parity Check (LDPC) codes is presented. The construction allows flexibility in the choice of design parameters like rate, average degree, girth and block length of the code. The construction complexity of codes of the family grows only quadratically with the block length.
The lack of eyesight is a severe obstacle faced by the blind and limits their access to technology. Developments in assistive technology can be traced from the implementation of braille through engraving and embossing the script. With the growth of digital age, braille is included in keyboards and number pads and more recently as mechanical refreshable(More)
In this paper we investigate the bit error rate performance of orthogonal frequency division multiplexing system with channel estimation through least square error (LSE) and minimum mean square error (MMSE) algorithms. In this paper we are implementing the M-ary phase shift keying (M-PSK) and M-ary quadrature amplitude modulation (M-QAM) digital modulation(More)
14 www.ijrst.weebly.com Abstract— The main idea between OFDM is, the so called, Multi Carrier Modulation (MCM) transmission technique. The performance is calculated in terms of Bit Error Rate (BER) versus the Signal to Noise Ratio (SNR). In this project we discuss the BER performance of the MIMO-OFDM system with two different equalizers (ZF and MMSE) for(More)