DELTAMODULATION FOR THE RECORDING AND TRANSMISSION OF ANALOG BIOMEDICAL DATA
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In this thesis the principles underlying the theory and operation of a proposed Deltamodulation Scheme for the recording and transmission of periodic, aperiodic and random biomedical signals are discussed. It is shown that the frequency spectrum of the delta signal is predictable once the system transfer function of the transmission medium is given; therefore, the maximum transmission bandwidth can be determined. The system linearity is also investigated. It is concluded that the deltamodulation is not a linear process. The results of experiments are given which verify the theoretical predictions. A simulated ECG signal transmission and receiving system which was designed and tested as an experimental operating example is described along with the actual tests which were performed with it.