Data transmission over telephone lines

Inter-symbol interference and impulse noise are the two main factors which detract from the use of the telephone network as an efficient data transmission system. Present data modems (the interfaces between the line and the data source) when used on the network, operate at low data rates and tend to deliver data with excessive errors. This thesis is concerned with the design of novel equipment to be used as part of the data modem, thereby enabling data to be transmitted at a high rate, and with much reduced error rate. [Continues.]