A novel approach to frequency synthesis and modulation using quadratic correlation

Due to the severe FM-TDMA constraints imposed in the established and emerging Personal Communication Systems, it is necessary to perform fast frequency channel switching. This feature, together with the modulation characteristic, that requires a bandwidth close to the interchannel switching ratio, make it difficult to merge both modulation and channelization in the same single loop structure. In fact, a PLL synthesizer damping factor has to be so low that it destroys the modulation if no special care is taken. The present paper shows some architecture and analytical studies, in order to obtain joined modulation and channelization, with a single loop synthesizer using a quadratic correlation loop