Amplitude Normalization

In order to make the amplitude parmeters related to signal-to-noise ration (SNR) instead of absolute amplitude, it is wise to normalize the amplitudes by the square-root of the AR spectrum at the frequency of the sinusoid. This also assists in the PD estimation because amplitudes of false detections or weak-SNR sinusoids will be approximately known. This is implemented in software/module_sinar.m.