US 11,750,433 B2
Crest factor reduction
Ashim Biswas, Sollentuna (SE); Stefan Engström, Värmdö (SE); S M Shahrear Tanzil, Nepean (CA); and Rui Hou, Täby (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/636,165
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Aug. 21, 2019, PCT No. PCT/SE2019/050767
§ 371(c)(1), (2) Date Feb. 17, 2022,
PCT Pub. No. WO2021/034240, PCT Pub. Date Feb. 25, 2021.
Prior Publication US 2022/0294678 A1, Sep. 15, 2022
Int. Cl. H04L 27/26 (2006.01)
CPC H04L 27/2623 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method for crest factor reduction, the method comprising:
generating a signal, xs(t);
generating a vector, x(t), of size N×1 based on xs(t), wherein N>1;
generating a clipping signal vector, z(t), based on x(t), wherein z(t) is a vector of size N×1;
producing a transformed signal vector, y(t), based on z(t), wherein y(t) is a vector of size N×1; and
generating an output signal vector, xo(t), based on y(t) and x(t), wherein generating xo(t) comprises subtracting y(t) from x(t) and xo(t) is a vector of size N×1, wherein
generating z(t) based on x(t) comprises calculating: x(t)×A, wherein A is a function of x(t).