Complex sentence: In multitaper spectral estimator, the tapers are chosen to be Slepian sequences, after David Slepian (also known in literature as discrete prolate spheroidal Sequences or DPSS for short).
Split into simpler sentences: In multitaper spectral estimator, the tapers chosen are called Slepian sequences, after David Slepian. These are also known in literature as discrete prolate spheroidal Sequences (or DPSS for short).