An adaptive equalizer for frequency modulated signals

The multiplicative scheme proposed for the demodulation of frequency modulated signals can deliver an error signal that, essentially, reflects the amplitude distortion of the transmission channel and, thus, can be used for blind adaptive equalization. The implementation of the corresponding LMS algorithm is discussed and illustrated by simulations. In fact, an alternative to the classical CMA approach is provided. The demodulation scheme, which belongs to the frequency discrimination family, is efficient since it requires no angle calculation or square root extraction and, in the various blocks , the sampling frequency can be chosen to minimize the computational complexity.