Abstract
The use of a pulse sequence modulated by an M-sequence as an input test signal for measuring system response is proposed, and the signal processing procedures in this method are considered.
The response function of a system subjected to a single pulse input can be obtained by the least squares method or the decoding procedure, and the moving average of this response function is obtained by the correlation method.
In the usual response measuring method using an M-sequence signal, there is a possibility that a deceptive response appears in the processed result if some nonlinear delays exist at the switching instants of the test signal. The proposed pulse sequence test signal has an advantage over the simple M-sequence test signal in that this kind of error does not occur.
The paper also shows that the above consideration suggests the structure of the multislit which can avoid the occurrence of the ghost caused by the slit-width errors in Hadamard spectroscopy.
