公开(公告)号：BR9607557A

公开(公告)日：1998-07-07

申请号：BR9607557

申请日：1996-10-18

Applicant: MOTOROLA INC

Inventor： RONK JOHN G ,  DORAN PATRICK J ,  EMEOTT STEPHEN P ,  WHITE GREGORY C

IPC: H04L27/34

公开(公告)号：FR2740634A1

公开(公告)日：1997-04-30

申请号：FR9613247

申请日：1996-10-30

Applicant: MOTOROLA INC

Inventor： WHITE GREGORY C ,  EMEOTT STEPHEN P ,  RONK JOHN G ,  DORAN PATRICK J

IPC: H04L27/34 ,  H03M13/00 ,  H04Q7/20

Abstract: A symbol constellation is logically divided into a plurality of multi-symbol subsets (201-204). Additionally, a series of primary bits and a series of secondary bits are provided. At least a first selected primary bit is error control encoded (303) to provide an M bit pre-symbol (603) that uniquely corresponds to a multi-symbol subset (602). The M bit pre-symbol is modulated (304) by at least a first selected secondary bit to provide an N bit symbol (605) that uniquely corresponds to a symbol included in the multi-symbol subset. Recovered primary bits are determined by comparing a received symbol (609) with only one symbol in each of the multi-symbol subsets. Additionally, recovered secondary bits are determined by comparing the received symbol with predetermined decision boundaries (622). In this manner, varying degrees of error protection are provided allowing for a wider variety of coding rates.

公开(公告)号：GB2312814A

公开(公告)日：1997-11-05

申请号：GB9713516

申请日：1996-10-18

Applicant: MOTOROLA INC

Inventor： WHITE GREGORY C ,  EMEOTT STEPHEN P ,  RONK JOHN G ,  DORAN PATRICK J

IPC: H04L27/34 ,  H03M13/00

Abstract: A symbol constellation is logically divided into a plurality of multi-symbol subsets (201-204). Additionally, a series of primary bits and a series of secondary bits are provided. At least a first selected primary bit is error control encoded (303) to provide an M bit pre-symbol (603) that uniquely corresponds to a multi-symbol subset (602). The M bit pre-symbol is modulated (304) by at least a first selected secondary bit to provide an N bit symbol (605) that uniquely corresponds to a symbol included in the multi-symbol subset. Recovered primary bits are determined by comparing a received symbol (609) with only one symbol in each of the multi-symbol subsets. Additionally, recovered secondary bits are determined by comparing the received symbol with predetermined decision boundaries (622). In this manner, varying degrees of error protection are provided allowing for a wider variety of coding rates.

公开(公告)号：MX9704951A

公开(公告)日：1997-10-31

申请号：MX9704951

申请日：1996-10-18

Applicant: MOTOROLA INC

Inventor： WHITE GREGORY C ,  EMEOTT STEPHEN P ,  RONK JOHN G ,  DORAN PATRICK J

IPC: H04L27/34

Abstract: Una constelacion de símbolos está dividida logicamente en una pluralidad de subconjuntos multisímbolo (201-204). Adicionalmente, se proporciona una serie de bits primarios y una serie de bits secundarios. Por lo menos un primer bit primario seleccionado está codificado con control de error (303) para proporcionar un presímbolo de M bits (603) que corresponde en forma unica a un subconjunto multisímbolo (602). El presímbolo de M bits es modulado (304) por lo menos un primer bit secundario seleccionado para proporcionar un símbolo de N bits (605) que corresponde en forma unica con un símbolo incluido en el subconjunto multisímbolo. Los bits primarios recuperados se determinan comparando un símbolo recibido (609) solamente con un símbolo de cada uno de los subconjuntos multisímbolo. Adicionalmente, los bits secundarios recuperados se determinan comparando el símbolo recibido con los límites de decision predeterminados (622). De esta manera, se proporcionan grados variables de proteccion contra error que permiten una variedad más amplia de velocidades de codificacion.