US 12,413,384 B2
Radio receiver devices
Wei Li, Trondheim (NO)
Assigned to Nordic Semiconductor ASA, Trondheim (NO)
Filed by Nordic Semiconductor ASA, Trondheim (NO)
Filed on Nov. 20, 2023, as Appl. No. 18/514,009.
Claims priority of application No. 2217464 (GB), filed on Nov. 22, 2022.
Prior Publication US 2024/0171370 A1, May 23, 2024
Int. Cl. H04L 7/04 (2006.01)
CPC H04L 7/042 (2013.01) 20 Claims
OG exemplary drawing
 
1. A radio receiver device arranged:
to receive a radio signal comprising a symbol sequence corresponding to a training sequence;
to determine a first autocorrelation of said symbol sequence using a first autocorrelation latency;
to determine a second autocorrelation of said symbol sequence using a second autocorrelation latency that is longer than the first autocorrelation latency; and
to combine said first and second autocorrelations to determine an estimate of carrier frequency offset between the radio signal and the radio receiver device;
wherein a longest autocorrelation of the symbol sequence that is determined by the radio receiver device uses a longest autocorrelation latency that is between 50% and 80% of a length of the training sequence.