Nature of Sideband Generation

The serious investigation of sidebands (SBs), which are the result of nonlinear processes, began in the late 19th century when research was being conducted on amplitude modulation (Panter, 1965). In 1875, A.M. Mayer experimentally proved the existence of SBs. In 1886, M. Leblanc was likely the first to amplitude modulate a carrier signal with speech. Later, in 1894, Lord Rayleigh theoretically demonstrated the existence of SBs.