M.Ing. (Electrical & Electronic Engineering) / This thesis investigates the problems associated with providing end to end in-service performance monitoring on leased line data networks. These problems are of both practical and theoretical nature. A solution to this problem is presented and is based on linear block coding using some overhead bandwidth available within the channel. The coding scheme relies on the characteristics of shortened cyclic codes. A method is given to obtain the undetected error probability for an arbitrary code generation polynomial with a specified degree of shortening. References to the literature explain why this type of calculation is not straightforward. This method is used to compare various candidate codes. A method is discussed which facilitates rapid isolation of groups of favourable candidate codes for further study. Software is developed to aid in the code selection process and optimum codes are selected for leased line application. It is shown that in most cases improvements in undetected error probability are achievable, when comparison is made to previously published codes, proposed for error detection. This is because code generators optimum at their published or natural coding rate are seldom optimum at the rate which results from shortening the code.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:uj/uj:3788 |
| Date | 11 February 2014 |
| Creators | Gildenhuys, Burgert |
| Source Sets | South African National ETD Portal |
| Detected Language | English |
| Type | Thesis |
| Rights | University of Johannesburg |
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