Browsing Electronic Engineering by Issue Date
Now showing items 21-40 of 160
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Multiuser demodulation for DS-CDMA systems in fading channels.
(2000)The problems of optimal as well as suboptimal detection for CDMA transmissions over an additive white Gaussian noise (AWGN) channel, have been the focus of study in the recent past. However, CDMA transmissions are ... -
Design considerations and implementation of a RF front-end for CDMA adaptive array system.
(2000)Recent studies have shown that considerable system capacity gains in mobile communication systems can be obtained by exploiting the use of antenna arrays at the base station. Unfortunately, these studies make little ... -
Parallel implementation of fractal image compression
(2000)Fractal image compression exploits the piecewise self-similarity present in real images as a form of information redundancy that can be eliminated to achieve compression. This theory based on Partitioned Iterated Function ... -
Lattice-structure based adaptive MMSE detectors for DS-CDMA systems.
(2001)There has been significant interest in the research community on detectors for DS-CDMA systems. The conventional detector, which detects users ' data bits, by using a filter matched to the users' spreading codes, has two ... -
Implementation of a WCDMA AAA receiver on an FPGA based software radio platform.
(2001)WCDMA promises to achieve high-speed internet, high quality image transmission and high-speed data services with larger system capacity. However, Multiple Access Interference is one of the major causes of transmission ... -
Performance of turbo-coded DS-CDMA systems in fading and burst channels.
(2001)Turbo codes are a class of forward error correction (FEC) codes that offer energy efficiencies close to the limits predicted by information theory. The features of turbo codes include parallel code concatenation, recursive ... -
Performance of the transmission control protocol (TCP) over wireless with quality of service.
(2001)The Transmission Control Protocol (TCP) is the most widely used transport protocol in the Internet. TCP is a reliable transport protocol that is tuned to perform well in wired networks where packet losses are mainly due ... -
Performance analysis of signalling system No. 7 networks during signalling transfer point congestion.
(2002)The growth of mobile networks and the imminent deployment of third generation networks and services will require signalling networks to maintain their integrity during increased unanticipated traffic volumes. As signalling ... -
A MAC protocol for wireless networks with QoS guarantees.
(2002)Mobile communications are becoming integrated into society at an explosive rate. While 2nd generation (2G) systems limit the user to basic services such as voice and low-bit rate data, 3G networks are characterized by ... -
MMSE equalizers and precoders in turbo equalization.
(2003)Transmission of digital information through a wireless channel with resolvable multipaths or a bandwidth limited channel results in intersymbol interference (1SI) among a number of adjacent symbols. The design of an equalizer ... -
A token based MAC protocol for wireless ad hoc networks.
(2003)The emergence of portable terminals in work and living environments is accelerating the progression of wireless networks. A wireless ad hoc network is a new network concept where users establish peer-to-peer communication ... -
Towards the development of an electronic nose.
(2003)Electronic noses are targeted at determining odour character in a fashion that emulates conscious odour perception in mammals. The intention of this study was to develop an organisational framework for electronic noses and ... -
Development, implementation and quantification of an ad-hoc routing protocol for mobile handheld terminals.
(2003)An ad-hoc network is a collection of mobile nodes (wireless communication devices) that transmit data over systems that do not require any centralized control, such as that found in cellular networks. This makes ad-hoc ... -
Design and implementation of an on-demand ad-hoc routing algorithm for a positional communication system.
(2003)A mobile ad-hoc network is an autonomous network of mobile devices that are connected via wireless links. In such networks there is no pre-existing infrastructure and nodes are free to move in a random fashion. Due to this ... -
Power and performance trade-off in DS-CDMA receivers based on adaptive LMS-MMSE multi-user detector.
(2003)Third generation cellular communication systems based on CDMA techniques have shown great scope for improvement in system capacity. Over the last decade, there has been significant interest in DS-CDMA detectors. The ... -
Subspace-based channel estimation for DS/CDMA systems exploiting pulse- shaping information.
(2003)Third generation wireless systems have adopted Direct-Sequence/Code-Division Multiple-Access (DS/CDMA) as the multiple access scheme of communication. This system would typically operate in a multipath fading channel. This ... -
High ratio wavelet video compression through real-time rate-distortion estimation.
(2003)The success of the wavelet transform in the compression of still images has prompted an expanding effort to exercise this transform in the compression of video. Most existing video compression methods incorporate techniques ... -
Quality of service for voice over next generation networks.
(2004)The Global communications transformation is currently in progress. Packet switched technology has moved from data - only applications into the heart of the network to take up the functions of traditional circuit - switched ... -
Constant modulus based blind adaptive multiuser detection.
(2004)Signal processing techniques such as multi user detection (MUD) have the capability of greatly enhancing the performance and capacity of future generation wireless communications systems. Blind adaptive MUD's have many ... -
Combined turbo coding and interference rejection for DS-CDMA.
(2004)This dissertation presents interference cancellation techniques for both the Forward Error Correction (FEC) coded and the uncoded Direct Sequence Code Division Multiple Access (DS-CDMA) systems. Analytical models are ...