  We generalize the construction of Doppler-tolerant Golay complementary
waveforms by Pezeshki-Calderbank-Moran-Howard to complementary code sets having
more than two codes. This is accomplished by exploiting number-theoretic
results involving the sum-of-digits function, equal sums of like powers, and a
generalization to more than two symbols of the classical two-symbol
Prouhet-Thue-Morse sequence.
