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A “Hamming” Encoder/Decoder For Single Channel, 7.42-Unit, Teletype Systems

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Title: A “Hamming” Encoder/Decoder For Single Channel, 7.42-Unit, Teletype Systems
Authors: Benevides, Francis
Issue Date: 15 Jan 2014
Publisher: University of Hawaii at Manoa
Abstract: The “Hamming” encoder/decoder is capable of detecting and correcting and single-bit error which may occur during the transmission of a data word. This report presents a detailed analysis of a “Hamming” encoder/decoder design to be used with a single-channel, 7.42-unit, teletype systems. Evaluation of a constructed prototype is included, along with a method used to induce single-bit errors to test the detection and correction capabilities of the system. Tests on the prototype were made at a teletype speed of approximately 100 words per minute and after one hour of operation the system detected and corrected all but two single-bit errors. Distortion checks were also made on the system by applying up to 20% marking and spacing bias to both encoder and decoder, resulting in an output distortion measurement of less that 1% switching bias. This system can provide up to 100%, error-free data transmission if it is utilized in a communication environment where only single-bit errors per data word is tolerated.
Pages/Duration: 29, xxxix
Rights: All UHM Honors Projects are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections:Honors Projects for Electrical Engineering

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