US 12,335,037 B2
Digital radio receivers
Wei Li, Trondheim (NO)
Assigned to Nordic Semiconductor ASA, Trondheim (NO)
Appl. No. 18/024,468
Filed by Nordic Semiconductor ASA, Trondheim (NO)
PCT Filed Sep. 6, 2021, PCT No. PCT/EP2021/074517
§ 371(c)(1), (2) Date Mar. 2, 2023,
PCT Pub. No. WO2022/049292, PCT Pub. Date Mar. 10, 2022.
Claims priority of application No. 2013945 (GB), filed on Sep. 4, 2020.
Prior Publication US 2023/0327807 A1, Oct. 12, 2023
Int. Cl. H04L 1/00 (2006.01); H03M 13/41 (2006.01); H04L 27/144 (2006.01)
CPC H04L 1/0072 (2013.01) [H03M 13/41 (2013.01); H04L 1/0045 (2013.01); H04L 27/144 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of operating a digital radio receiver comprising:
a) receiving an incoming radio signal comprising an incoming symbol sequence;
b) selecting a portion of the incoming symbol sequence;
c) determining a first error between the selected portion of the incoming symbol sequence and a first predetermined symbol sequence using a difference metric;
d) determining, using the difference metric, a set of second errors between the selected portion of the incoming symbol sequence and a respective set of second predetermined symbol sequences, each formed by prepending different length portions of a predetermined preamble symbol sequence to a beginning of the first predetermined symbol sequence; and
e) determining a minimum error from the first error and the set of second errors;
if the first error is not the minimum error, selecting a different portion of the incoming symbol sequence and repeating steps c) to e); and
if the first error is the minimum error, decoding a following portion of the incoming symbol sequence to produce a data payload.