US 12,463,850 B2
Communication unit for soft-decision demodulation and method therefor
Robert G. Maunder, Southampton (GB); and Aryan Tavakkoli, Chilworth (GB)
Assigned to AccelerComm Limited, Southampton (GB)
Appl. No. 18/015,509
Filed by AccelerComm Limited, Southampton (GB)
PCT Filed Jul. 9, 2021, PCT No. PCT/EP2021/069169
§ 371(c)(1), (2) Date Jan. 10, 2023,
PCT Pub. No. WO2022/013098, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 2010773 (GB), filed on Jul. 13, 2020; and application No. 2104420 (GB), filed on Mar. 29, 2021.
Prior Publication US 2023/0344685 A1, Oct. 26, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 25/06 (2006.01); H03M 13/00 (2006.01); H03M 13/29 (2006.01); H04B 1/707 (2011.01); H04L 25/03 (2006.01); H04L 27/22 (2006.01); H04L 27/227 (2006.01)
CPC H04L 25/03318 (2013.01) [H03M 13/2957 (2013.01); H03M 13/6325 (2013.01); H04B 1/707 (2013.01); H04L 25/067 (2013.01); H04L 27/22 (2013.01); H04L 27/2278 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communication unit for performing soft-decision demodulation comprising a receiver, wherein the receiver is arranged to receive a transmitted signal having a first set of bits comprising k bits that has been selected from a set of 2k possible signals according to values of the k bits, and includes a second set of bits comprising Qm bits based on a phase rotation of the transmitted signal selected from a set of 2Qm possible rotations, wherein the receiver comprises:
a demodulator comprising a bank of 2k correlators and configured to:
detect a transmission of each possible transmitted signal, and
output 2k phases of the correlator outputs as a third set of inputs;
a de-mapper circuit coupled to the demodulator and configured to:
receive the third set of inputs;
determine statistics derived from one aggregated correlator output phase distribution of the third set of inputs that approximates an aggregation of a 2k distributions of the output phases of the bank of 2k correlators when the corresponding one of the set of 2k possible signals was selected as the transmission signal; and
output a second set of aposteriori soft bits comprising Qm soft bits.