Use of Fuzzy Logic to control paralleled DC-DC converters

Abstract :-
The objective of the thesis is to introduce a new fuzzy logic control application, develop the associated mathematical theory and prove the concept and its advantages through comparative simulation with existing, classical, methods. A stable fuzzy logic controller for the master-slave current sharing loop of a paralleled DC-DC system is presented that exhibits a considerably improved large signal performance over the presently employed, small signal designed compensators, both in terms of system response and control effort. Because of high system complexity, the present small signal designs are unable to give a good response for large load changes and line transients. Continue reading Use of Fuzzy Logic to control paralleled DC-DC converters

Evaluation of TDOA Techniques for Position Location in CDMA Systems

Abstract :-
This thesis analyzes the performance of TDOA techniques in the CDMA systems. A comparison and assessment of different algorithms for finding the time difference estimates and for solving the hyperbolic equations generated by those estimates has been made. This research also considers a measure of accuracy for TDOA position location method which is shown to be more suitable for CDMA systems and more closely matches to the FCC requirements. Among the other contributions is a proposed method to perform cross-correlations to identify only the desired user’s TDOA in a multiuser environment. Continue reading Evaluation of TDOA Techniques for Position Location in CDMA Systems

Generating Climbing Plants Using L-Systems

Abstract :-
A novel method is proposed for procedurally generating climbing plants using L-systems. The goal is to generate geometry and textures for 3D-modelers, where procedurally generated content is used as a base for the final design. The algorithm is fast and efficiently simulates external tropisms such as gravitropism, heliotropism and other pseudo-tropisms. The structure of the generated climbing plants is discretized into strings of particles expressed using L-systems. The tips of the plant extend the branches by adding particles in its path, Continue reading Generating Climbing Plants Using L-Systems

Error Correcting Codes for Cooperative Broadcasting

Error Correcting Codes for Cooperative Broadcasting

Abstract :-
This talk considers the design and implementation of error correcting codes for cooperative broadcasting in wireless networks. Focus is on the case of two cooperating sources transmitting two classes of information to a single receiver. This case was first introduced in the seminal work of Bergmans and Cover and referred to as “over the air mixing”. Two levels of protection are provided using two low-density parity-check (LDPC) codes combined using Plotkin’s |u|u+v|-construction. Continue reading Error Correcting Codes for Cooperative Broadcasting