Electrical Communication Engineering (ECE)
Recent Submissions
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Bandwidth of linear antenna arrays�
Presented in this thesis are the following theoretical investigations on linear antenna arrays: A generalised expression for the array factor of a linear antenna array has been derived, which can be applied to both equally ... -
Some studies on Automatic-Repeat-Request error-Control schemes
Presented in this thesis are the following theoretical investigations carried out on Automatic Repeat Request (ARQ) error?control schemes. A new type of modified generalized stop?and?wait ARQ scheme is proposed and worked ... -
Signal Design for pulse compression
Society抯 dependence on electronic and electrical systems has increased rapidly over the past few decades, and people are relying more and more on these gadgets in their daily life because of the efficiency in operation ... -
Synthesis of arbitary antenna arrays
Design of antenna arrays for present?day requirements has to take into account both mechanical and electrical aspects. Mechanical aspects demand that the antennas have low profile, non?protruding structures, and structures ... -
Novel instrumentation and communication system for GMRT�
Radio telescopes are indispensable tools for frontline research in astronomy and astrophysics. In all radio telescopes, the control and monitor system provides the necessary coordination between the various building blocks ... -
Transform techniques for optical wave guides.
Practical applications of integrated optics require understanding of light propagation in dielectric waveguides of various geometries and call for elegant and quick methods of analysis. The aim of the thesis is to analyse ... -
Non-uniform sample based speech analysis and coding
The utility of non?uniform sample?based analysis and reconstruction of speech signals is explored. Instead of a perfect reconstruction criterion, properties of speech perception are exploited to select non?uniform samples ... -
Data communication in the presence of atomospheric noise bursts
At tropical latitudes, atmospheric noise bursts constitute an important interference to digital communication. The characteristics of these noise bursts have been extensively studied in the LF, MF and HF bands. Satisfactory ... -
Modeling the electrostatics of symmetric double gate MOSFETs
The continuous downsizing of Complementary Metal Oxide Semiconductor (CMOS) technology has resulted in drastic degradation of the performance of conventional MOS transistors. As a result, new transistor architectures need ... -
On the Sum-Rate Capacity of Gaussian X Channels
Interference caused by the reception of unintended signals at the receivers is a major source of performance bottleneck limiting the capacity of wireless communication systems. An interesting model to study the effect of ... -
Two signal estimation problems in the presence of chaos
We consider the dynamical system defined by the pair ([a,b],f)([a, b], f)([a,b],f), where [a,b][a, b][a,b] is a compact interval of R\mathbb{R}R and f:[a,b]?[a,b]f : [a, b] \rightarrow [a, b]f:[a,b]?[a,b] is a continuous ... -
Design and Development of a Hybrid TDMA/CDMA MAC Protocol for Multimedia Wireless Networks�
A Wireless Local Area Network (WLAN) provides high bandwidth to users in a limited geographical area. This network faces certain challenges and constraints that are not imposed on their wired counterparts. These include ... -
Diversity-Rate Trade-Off in an channel with fading
We study the diversity order versus rate of an additive white Gaussian noise (AWGN) channel in the whole capacity region. We show that for both discrete and continuous inputs, Gallager抯 upper bounds on error probability ... -
Routing and dimensioning in optical networks under traffic growth models
With the rapid growth of the Internet and the World Wide Web, we are seeing a relentless demand for networks of higher and higher capacities, at lower and lower costs. Fiber optics and wavelength-division multiplexing (WDM) ... -
Performance analysis of resource allocation schemes in cellular systems
In this thesis, we study the performance of cellular networks under various resource allocation schemes. Radio resources in cellular networks need to be managed efficiently in order to achieve good system performance. In ... -
TEO and its applications to speech/audio, ECG and image signals
In many signal processing applications, noise suppression in input signals is achieved by linear filtering. However, linear filters give poor performance for signals with sharp edges, in cases of non?additive noise, as ... -
Some design approaches for casual stable IIR and FIR perfect reconstruction filter banks
Perfect reconstruction filter banks (PRFBs) are widely used for signal decomposition, subband coding, subband adaptive filtering, etc. Both IIR and FIR filter banks are used in the applications mentioned above. Causal ... -
Some of the Neural Network Applications in Mobile Networks
Mobile and wireless networks represent the next trend in networking because of their usefulness in assisting an emerging mobile workforce in a growing information?oriented society. Advances in networking technologies, ... -
Adaptive subband coding of audio signals using spectral and temporal masking properites
Audio coding or audio compression is the technique of reducing the bit rate of digital audio signals, with a view to reducing the bitrate required for transmission or to reduce the storage space. The challenging requirements ...
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