ABSTRACT
Estimation of the amplitude and phase parameters of the sinusoids when the
frequencies are known a priori is called linear trigonometric (or harmonic) re-
gression. It is a special linear regression problem that can be solved by standard
techniques. Although treatments on basic linear regression analysis are abun-
dant, this chapter has some unique features. For example, we consider both
real-and complex-valued data in a unified manner, which is rarely done in other
treatments. We also consider the implications of closely spaced frequencies on
amplitude and phase estimation.