US 11,876,661 B2
Systems and methods for shaped single carrier orthogonal frequency division multiplexing with low peak to average power ratio
Fredric J. Harris, San Diego, CA (US); and Martial Gander, Manassas, VA (US)
Assigned to Spectral DSP Corp., New York, NY (US)
Filed by Spectral DSP Corp, New York, NY (US)
Filed on Jan. 13, 2023, as Appl. No. 18/096,940.
Application 18/096,940 is a continuation of application No. 17/236,886, filed on Apr. 21, 2021, granted, now 11,563,617.
Claims priority of provisional application 63/129,956, filed on Dec. 23, 2020.
Claims priority of provisional application 63/014,682, filed on Apr. 23, 2020.
Prior Publication US 2023/0275796 A1, Aug. 31, 2023
Int. Cl. H04L 27/26 (2006.01); H04L 25/03 (2006.01)
CPC H04L 27/2628 (2013.01) [H04L 25/03159 (2013.01); H04L 27/2605 (2013.01); H04L 27/2614 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for modulating a signal, comprising:
a transceiver, and
a processor in communication with the transceiver, the processor:
receiving an input signal from the transceiver; and
modulating the input signal to form Dirichlet kernels in a time domain to generate an offset Dirichlet kernel output time array, each Dirichlet kernel having a main lobe and a plurality of side lobes,
wherein modulating the input signal suppresses a peak to average power ratio of the offset Dirichlet kernel output time array by reducing the plurality of side lobes of each Dirichlet kernel and respective amplitudes of the side lobes, and wherein, in modulating the input signal, the processor inserts a spectral guard interval having a duration exceeding a largest delay spread interval between spectral replicates of the input signal in an M-point input frequency array.