On the uniform sampling of a sinusoidal signal
Justin Lee Brown · IEEE Transactions on Aerospace and Electronic Systems · 1988
It is generally accepted that a monochromatic signal such as sin 2 pi Wt (W>0) must be sampled at a uniform rate greater than the ostensible Nyquist rate of 2W samples per to effect a reconstruction of the signal. It is shown that a sinusoid of frequency W Hz is completely determined by its samples taken at the uniform rate of 2r samples per second, where r>0 is arbitrary subject only to the restriction that W not=kr for any positive integer k. In particular, a pure sinusoid may be sampled uniformly without loss of information at arbitrarily small rates.>