Patent ID: 11876661
Assignee: SPECTRAL DSP CORP.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The non-transitory computer readable medium of claim 14, the processor carrying out the step of modulating the input signal by:
receiving the input signal by an N-point time input array,
transforming the N-point time input array to a frequency domain by a discrete Fourier transform to generate an N-point input frequency array,
replicating the N-point input frequency array to generate the M-point input frequency array where M is greater than N, wherein the replicating of the N-point input frequency array inserts the spectral guard interval between spectral replicates of the N-point input frequency array,
utilizing a filter to generate a shaped M-point output filtered frequency array by multiplying the M-point input frequency array and the filter,
transforming the shaped M-point output filtered frequency array by an inverse discrete Fourier transform to generate an M-point offset Dirichlet kernel output time array,
generating a cyclic prefix time array by replicating duration points of an end of the M-point offset Dirichlet kernel output time array, and
appending the cyclic prefix time array to a beginning of the M-point offset Dirichlet kernel output time array to generate an M-point and duration point output time array.