Compatible SSB broadcasting system: new method of modulation

The article presents a new method of SSB modulation which ensures maximum compatibility with AM reception. Theoretically ideal compatibility with AM receivers and theoretically ideal absence of out-of-band radiation are reached by means of application of an envelope with an infinite spectrum. It is shown that the finiteness of the spectrum of the radio signal is ensured as a consequence of the infinity of the spectrum of the envelope. The spectrum width of the proposed radio signal is equal to the spectrum width of the common SSB radio signal. Theoretical inferences are confirmed by the results of experimental tests. The proposed radio signal can be received by common home AM receivers and no other special receivers are necessary. Application of the proposed method of transmission in broadcasting makes it possible to speed up the introduction of SSB broadcasting because the broadcasters will not risk losing their audience and the listeners will not be forced to buy new receivers.