公开(公告)号：US20230344685A1

公开(公告)日：2023-10-26

申请号：US18015509

申请日：2021-07-09

申请人： AccelerComm Limited

发明人： Robert G. Maunder ,  Aryan Tavakkoli

IPC分类号： H04L25/06 ,  H03M13/00 ,  H03M13/29 ,  H04B1/707 ,  H04L27/227

CPC分类号： H04L25/067 ,  H03M13/6325 ,  H03M13/2957 ,  H04B1/707 ,  H04L27/2278

摘要： A communication unit for performing soft-decision demodulation comprises a receiver that receives a transmitted signal having a first set of bits comprising k bits, selected from a set of 2k possible signals according to values of the k bits, and 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. The receiver comprises: a demodulator comprising a bank of 2k correlators and is 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 receives the third set of inputs: determines statistics derived from a number of aggregated correlator output phase distributions of the third set of inputs; and calculates and outputs a second set of aposteriori soft bits comprising Qm soft bits.

公开(公告)号：US20230261912A1

公开(公告)日：2023-08-17

申请号：US18015507

申请日：2021-07-09

申请人： AccelerComm Limited

发明人： Robert G. Maunder ,  Aryan Tavakkoli

IPC分类号： H04L25/03 ,  H04L27/22

CPC分类号： H04L25/03318 ,  H04L27/22

摘要： A communication unit for performing soft-decision demodulation comprises a receiver that receives a transmitted signal conveying a first set of bits comprising k bits selected from a set of 2k possible signals. A demodulator comprises a bank of 2k correlators that detects a transmission of each possible transmitted signal, and outputs 2k magnitudes of correlator outputs, based on the detected possible transmitted signals, as a first set of inputs. A-de-mapper circuit receives the first set of inputs and determines derived from a plurality of aggregated correlator output magnitude distributions of the first set of inputs, wherein the plurality of aggregated correlator output magnitude distributions is fewer than 22k; and calculates therefrom a first set of aposteriori soft bits comprising k soft bits. In this manner, high quality soft-decisions can be obtained in a robust and practical manner.