Bandwidth reduction of an FM broadcast signal using a baseband precompensation technique

An apparatus for processing a baseband multiplex signal, the apparatus comprising:

• a first frequency modulator for frequency modulating the baseband multiplex signal to produce a first modulated signal;
• a filter for filtering the first modulated signal to produce a first filtered signal;
• a detector for demodulating the first filtered signal to produce a first demodulated baseband multiplex signal;
• a correction circuit for correcting the first demodulated baseband multiplex signal to reduce or eliminate distortion in a predetermined frequency range of the first demodulated baseband multiplex signal to produce a first corrected signal;
• and
• a second frequency modulator for frequency modulating the first corrected signal to produce a second modulated signal.

An apparatus for processing a baseband multiplex signal, the apparatus comprising:

• means for frequency modulating the baseband multiplex signal to produce a first modulated signal;
• means for filtering the first modulated signal to produce a first filtered signal;
• means for demodulating the filtered signal to produce a demodulated baseband multiplex signal;
• means for correcting the demodulated baseband multiplex signal to reduce or eliminate distortion in a predetermined frequency range of the demodulated baseband multiplex signal to produce a corrected signal;
• and
• means for frequency modulating the corrected signal to produce a second modulated signal.