| 摘要 |
A method of matched filtering or circular correlation between a digitally represented band limited periodic input signal and a predetermined single period reference waveform which provides output spaced at predetermined intervals independent of the input signal sampling rate and comprising the steps of i) accepting a digitised signal, such that the samples are a unique representation of the signal, and also represented by an appropriate level and number of quanta; ii) collecting overlapped batches of a number of successive samples, and storing the batch samples for future use; iii) computing a frequency or time domain representation of the reference waveform; iv) simultaneously computing a number or batch of outputs by means of a two-stage process of super-fast correlation and range (or time)-domain re-sampling, respectively; v) outputting a time or frequency domain representation of the processed signals at a rate commensurate with the digitised signal input rate, and signal processing apparatus employing such a method. |
