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In this paper, a simplified message passing algorithm for decoding low-density parity-check (LDPC) codes is proposed with a view to reduce the implementation complexity. The algorithm is based on simple hard-decision decoding techniques while utilizing the advantages of soft channel information for improvement in decoder performance. The algorithm has been validated through simulation using LDPC code...
The transformational potential of the Information and Communication Technology lies in the ability of the people to make the best use of it. In fact, they need to be e-ready to benefit from what is known as the digital society. The rapidity of technological advances is, in fact, pushing many developing countries digitally far behind. However, as of now, it is well accepted that the digital divide...
Low density parity check (LDPC) codes are the error-correcting codes which offer huge advantages in terms of coding gain, throughput and power dissipation. Error correction algorithms are often implemented in hardware in order to ensure fast processing. The hardware implementation of LDPC decoders using traditional hardware description language (HDL) based approach is a complex and time consuming...
This paper presents a SIM-based tool for user authentication in various service areas such as financial transactions in e-commerce. Other remote services can use SIM as an authentication tool over existing GSM technology through GPRS, which is an additional packet data feature for the GSM network. It allows both packet-switched and circuit-switched traffic to exist in the GSM infrastructure. As GPRS...
Traditionally the discrimination of speech from non-speech signals within audio has been done through the use of amplitude threshold levels or energy levels within the audio signals. While these methods along with other newer methods have been shown to provide effective results in discriminating speech, this paper aims at taking a different perspective in speech discrimination. In general the variations...
A two dimensional discrete wavelet transform processor for color images is presented in this paper. Optimal hardware utilization with minimal CLB slice count and high frequency of operation is achieved in implementing a JPEG2000 standard integer lossless 5/3 filter. Lifting scheme is used to reduce hardware complexity. Image boundaries are handled using the symmetric extension property of the lifting...
This paper presents the design of a tracking algorithm for an in-vivo capsule swallowed by patients. Such devices play a very important role in the diagnosis and treatment of internal disorders, for example, in the digestive tract. Tracking the location of the capsule as it travels down the digestive tract is critical to ensure its position near the affected area. Various sensing mechanisms that can...
This paper presents a bus level SystemC model of an avionics mission system data bus. The mission system is a very complex distributed computer network consisting of mission control computer, radars, an array of subsystems and sensors. The data bus plays a central role in the system as it carries all the information between the system components. Therefore modeling the bus at an appropriate level...
Peptides containing the extracellular matrix peptide cell attachment sequence RGD possess potent, endothelium-dependent vasorelaxant properties. In the present study, the ability of RGD-containing peptides to cause vasorelaxation in the presence and absence of a functional endothelium was examined in rat aortic rings along with the ability of RGD-containing peptides to increase cGMP production in...
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