US 12,270,929 B2
Systems and methods for long pulse radar chirp detector for LTE Licensed Assisted Access dynamic frequency selection
David Ottosson, Karlstad (SE); and Vinod Aduru, Nellore Andhra Pradesh (IN)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/593,273
Filed by Telefonaktiebolaget LM Ericsson (PUBL), Stockholm (SE)
PCT Filed Mar. 18, 2019, PCT No. PCT/SE2019/050241
§ 371(c)(1), (2) Date Sep. 14, 2021,
PCT Pub. No. WO2020/190183, PCT Pub. Date Sep. 24, 2020.
Prior Publication US 2022/0196790 A1, Jun. 23, 2022
Int. Cl. G01S 7/02 (2006.01); G01S 7/35 (2006.01)
CPC G01S 7/023 (2013.01) [G01S 7/021 (2013.01); G01S 7/0232 (2021.05); G01S 7/354 (2013.01); G01S 7/356 (2021.05)] 26 Claims
OG exemplary drawing
 
1. A method by a network node for linear chirp detection, the method comprising:
obtaining a first number, N, of samples of a signal;
dividing samples into at least a first group and a second group, the first group comprising a second number, D, of the samples of the signal, the second group comprising a third number, N−D, of the samples of the signal;
performing a correlation between the first group of samples and the second group of samples to generate a resultant group of samples of the signal,
within the resultant group of samples, identifying a peak value in the frequency domain; and
based on at least one property associated with the peak value, determining whether there is a linear chirp within the signal.