| The objective of this thesis is to determine the spectra of several types of convolutional codes: recursive systematic, recursive systematic punctured, code (PCCC). The privileged approach is based on an exploration of code trees. Methods for determining the spectrum of convolutional code and the one of punctured code were developed under the supervision of professor David Haccoun in the telecommunication section at Ecole Polytechnique de Montreal. The algorithms used in this thesis are based on these methods, but are adapted to recursive systematic convolutional codes and to recursive systematic convolutional punctured codes. After several modifications of these algorithms, an algorithm has been developed to calculate the spectrum of PCCC codes. The algorithms have been programmed in C language and implemented on a UNIX system of a SUN network.; By application of these algorithms, we have extended our knowledge of the spectrum of several types of codes such as recursive systematic convolutional code, recursive systematic convolutional punctured code, and PCCC code. (Abstract shortened by UMI.)... |
