Gc. Zhou et Xg. Xia, MULTIPLE FREQUENCY DETECTION IN UNDERSAMPLED COMPLEX-VALUED WAVE-FORMS WITH CLOSE MULTIPLE FREQUENCIES, Electronics Letters, 33(15), 1997, pp. 1294-1295
The determination of multiple frequencies in undersampled waveforms is
studied, where the multiple frequencies are close to each other. Give
n multiple undersampling rates, the maximal range of the detectable mu
ltiple frequencies is the least common multiple of these multiple rate
s under the assumption that these rates are larger than twice the maxi
mal distance between the multiple frequencies.