| 摘要 |
Provided are methods and systems for digital signal processing by applying an improved SDFT technique for eliminating ripple in side lobes of a resulting spectrum. An exemplary method may comprise receiving an input signal which includes a number of discrete samples taken at regular time intervals. The input signal may then be filtered by a modified comb filter according to the sliding DFT technique to generate first and second filtered signals, the second filtered signal being filtered using a different filter coefficient. The first and second filtered signals may be processed by a first and second plurality of resonators respectively, according to the sliding DFT technique, to generate respective first and second SDFT output signals. The first and second SDFT output signals may then be selectively summed to generate a resulting output signal.
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