- - NON-CONTIGUOUS SPECTRAL-BAND MODULATOR AND METHOD FOR NON-CONTIGUOUS SPECTRAL-BAND MODULATION

摘要

Embodiments of a non-adjacent spectrum-band modulator and a method for non-adjacent spectrum-band modulation are outlined herein. In some embodiments, the input symbol tuple can be mapped to a sequence of values. Each value of the sequence may represent an instantaneous frequency of the waveform for a signal having a power spectral density that is substantially limited to two or more subbands of the non-adjacent spectrum. The values of the sequence of instantaneous frequency values may accumulate and a phase-sample sequence representing the phase samples of the transmission waveform may be generated. To produce a constant coefficient signal sequence, exponentiation may be performed on the phase-sample sequence. When the signal is in the subband, an output signal sequence can be generated that is confined to an area in the complex plane, such as an annular. The output signal sequence may be shaped to limit spectral energy during transitions between subbands.