公开(公告)号：BR9815183A

公开(公告)日：2000-10-10

申请号：BR9815183

申请日：1998-04-03

Applicant: MOTOROLA INC

Inventor： EYUBOGLU M VEDAT ,  KIM DAE-YOUNG ,  TUNG CHIEN-CHENG

IPC: H03M5/00 ,  H04B14/04 ,  H04L25/49 ,  H04L27/18 ,  H04K1/10

Abstract: A system transmits digital information bits, which are encoded into a predefined number of signed symbols per frame from a transmitter (40) over a network (46) to a receiver, wherein the transmitted signed symbols have a desired spectral shape; the digital information bits being divided into a first predetermined number of magnitude information bits and a second predetermined number of sign information bits per frame, the transmitter including: a magnitude mapping device (50) for mapping the magnitude information bits to the predefined number of symbols; a sign bit encoder (52) for encoding the sign information bits into the predefined number of encoded symbol sign bits per frame; and a signal point selector (54), responsive to the magnitude mapping device and the sign bit encoder, which combines the symbol magnitudes and the encoded symbol sign bits to form the predefined number of transmitted signed symbols per frame.

公开(公告)号：AU2621200A

公开(公告)日：2000-08-07

申请号：AU2621200

申请日：2000-01-20

Applicant: MOTOROLA INC

Inventor： KIM DAE-YOUNG ,  PARIZHSKY VLADIMIR

IPC: H04L1/00 ,  H04L25/49 ,  H04L5/12

Abstract: A system (180) receives input bits from a user. From the input bits, an equivalence class is defined which has at least one constellation point. One of the constellation points in the equivalence class is chosen to represent an output of a channel. A redundancy bit is calculated from the output of the channel and is used to define a next equivalence class for the system (180).

公开(公告)号：CA2317545A1

公开(公告)日：1999-07-08

申请号：CA2317545

申请日：1998-11-13

Applicant: MOTOROLA INC

Inventor： HUMBLET PIERRE A ,  EYUBOGLU M VEDAT ,  KIM DAE-YOUNG

IPC: H04L27/00 ,  H04B14/04 ,  H04L25/03 ,  H04L25/49

Abstract: A device and method for precoding data signals for pulse code modulation (PCM) transmission including a transmitter (52) for transmitting a sequence of analog levels over analog channel to a quantization device, wherein the analog channel modifies the transmitted analog levels, the transmitter (52) comprising: a mapping device (150) for mapping data bits to be transmitted to a sequence of equivalence classes, wherein each equivalence class contains one or more constellation points; and a constellation point selector (152) interconnected to the mapping device (150) which selects a constellation point in each equivalence class to represent the data bits to be transmitted and which transmits an analog level that produces the selected constellation point at an input to the quantization device.

公开(公告)号：CA2285073A1

公开(公告)日：1998-10-15

申请号：CA2285073

申请日：1998-04-03

Applicant: MOTOROLA INC

Inventor： EYUBOGLU M VEDAT ,  KIM DAE-YOUNG ,  TUNG CHIEN-CHENG

IPC: H03M5/00 ,  H04B14/04 ,  H04L25/49 ,  H04L27/18 ,  H04K1/10

Abstract: A system transmits digital information bits, which are encoded into a predefined number of signed symbols per frame from a transmitter (40) over a network (46) to a receiver, wherein the transmitted signed symbols have a desired spectral shape; the digital information bits being divided into a first predetermined number of magnitude information bits and a second predetermined number of sign information bits per frame, the transmitter including: a magnitude mapping device (50) for mapping the magnitude information bits to the predefined number of symbols; a sign bit encoder (52) for encoding the sign information bits into the predefined number of encoded symbol sign bits per frame; and a signal point selector (54), responsive to the magnitude mapping device and the sign bit encoder, which combines the symbol magnitudes and the encoded symbol sign bits to form the predefined number of transmitted signed symbols per frame.