Patent ID: 8923437

Claim:
A non-contiguous spectral-band modulator configured to transmit a single waveform to traverse two or more subbands of a non-contiguous spectrum, the modulator comprising: a signal-trajectory memory to map an input symbol tuple to a sequence of phase values, each value of the sequence of phase values representing an instantaneous frequency of the waveform for a signal with a power spectral density that is substantially constrained to a current one of the two or more subbands of the non-contiguous spectrum; a numerically-controlled-oscillator (NCO) component to accumulate the values of the sequence of phase values and to generate a phase-sample sequence representing phase samples of the waveform; a complex exponential element to perform an exponentiation on the phase-sample sequence and to generate a constant modulus signal sequence; and a variable gain component to multiply the constant modulus signal sequence by a weighting sequence to generate an output signal sequence corresponding to the waveform, the output signal sequence being constrained spectrally to a region in a complex plane while in one of the two or more subbands and having a controlled signal trajectory during transitions between the two or more subbands.