公开(公告)号：WO9817044A3

公开(公告)日：1998-07-02

申请号：PCT/US9718554

申请日：1997-10-15

Applicant: MOTOROLA INC

Inventor： EYUBOGLU M VEDAT ,  BARABELL ARTHUR J ,  HUMBLET PIERRE A

IPC: H04M1/24 ,  H04J3/12 ,  H04L25/03 ,  H04L25/49 ,  H04M

CPC classification number: H04L25/4902 ,  H04J3/125 ,  H04L25/03828 ,  H04L25/4927

Abstract: A system and device (200) for, and method of, detecting, characterizing, and mitigating deterministic distortion in a communication system. An exemplary communication system includes a digital adaptor (220) for sending octets on to a backbone of a PSTN, which then sends, and potentially distorts the octets, received by a line interface (130). The line interface converts the octets to baseband signals received by an analog adaptor. Several mechanisms and methods are described in which the analog and digital adaptor (220, 260) cooperate to detect the presence of distortion, in particular, robbed bit signaling, on the communication system. The characterization may then be used to mitigate the effects of the distortion. Several receive constellations are provided, each constructed in view of the transmit constellation and in view of the manner in which the deterministic distortion will distort signals transmitted over the system. The receive constellations differ from the transmit constellation.

公开(公告)号：EP0927481A4

公开(公告)日：2003-04-23

申请号：EP97945245

申请日：1997-09-19

Applicant: MOTOROLA INC

Inventor： EYUBOGLU M VEDAT ,  HUMBLET PIERRE A

IPC: H04L25/34 ,  H04L25/49 ,  H04L25/03

CPC classification number: H04L25/4927

Abstract: The transmitter (56) for transmitting a sequence of octets over a digital network which digital network converts the octets into a sequence of levels, the transmitter including: mapping device (74) outputting for each group of data bits an equivalence class of one or more levels; a level selector (76), for selecting the level in the equivalence class to represent the group of data bits to be transmitted; a filter device (78), which receives at its input previously selected levels and provides its output to the level selector, wherein the level selector (76) selects the level to be transmitted based on the output of the filter device (78); and an octet converter (80), which receives the selected level at its input and transmits over the digital network an octet corresponding to the selected level to produce the analog signal having the predefined spectral shape when the transmitted octets are converted to levels in the digital network.

公开(公告)号：EP1038379A4

公开(公告)日：2003-01-02

申请号：EP98960216

申请日：1998-11-13

Applicant: MOTOROLA INC

Inventor： KIM DAE-YOUNG ,  HUMBLET PIERRE A

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

CPC classification number: H04L25/4927 ,  H04L25/03343

Abstract: A transmitter in an analog pulse code modulation (PCM) modem (12) which transmits analog levels over an analog channel (18) to produce constellation points at a quantization device (26), wherein the constellation points correspond to groups of data bits to be transmitted to a digital PCM modem (28), the transmitter includes: a transmitter device which selects for each group of data bits to be transmitted a constellation point corresponding to the group of data bits and transmits over the analog channel a level that will produce at the input to the quantization device the selected constellation point; wherein the constellation points are chosen from a transmit constellation consisting of a plurality of non-uniformly spaced constellation points that have substantially equivalent, minimized error probability, constellation point to constellation point.

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：CA2139111C

公开(公告)日：1998-04-28

申请号：CA2139111

申请日：1993-06-24

Applicant: MOTOROLA INC

Inventor： HUMBLET PIERRE A ,  HLUCHYJ MICHAEL G ,  LEE WHAY CHIOU

IPC: H04M3/00 ,  H04M7/00 ,  H04Q3/66 ,  H04Q3/64 ,  H04L29/04

Abstract: A fallback strategy for a system (700) and method (200) is provided for reroutin g a call that fails to be established utilizing a first set of constraints in a communication network system. This strategy enab les the communication network system to utilize a look-around-first type of preemption that avoids unnecessary preemption and prov ides alternate routing for a call according to predetermined constraints selected by a user.

公开(公告)号：CA2267362A1

公开(公告)日：1998-04-02

申请号：CA2267362

申请日：1997-09-19

Applicant: MOTOROLA INC

Inventor： EYUBOGLU M VEDAT ,  HUMBLET PIERRE A

IPC: H04L25/34 ,  H04L25/49 ,  H03M1/66 ,  H04L25/03

Abstract: The transmitter (56) for transmitting a sequence of octets over a digital network which digital network converts the octets into a sequence of levels, the transmitter including: mapping device (74) outputting for each group of data bits an equivalence class of one or more levels; a level selector (76), for selecting the level in the equivalence class to represent the group of data bits to be transmitted; a filter device (78), which receives at its input previously selected levels and provides its output to the level selector, wherein the level selector (76) selects the level to be transmitted based on the output of the filter device (78); and an octet converter (80), which receives the selected level at its input and transmits over the digital network an octet corresponding to the selected level to produce the analog signal having the predefined spectral shape when the transmitted octets are converted to levels in the digital network.

公开(公告)号：CA2266618A1

公开(公告)日：1998-04-02

申请号：CA2266618

申请日：1997-09-23

Applicant: MOTOROLA INC

Inventor： HUMBLET PIERRE A ,  EYUBOGLU M VEDAT

IPC: H04L25/03 ,  H04L25/49 ,  H04L27/00 ,  H04L17/02

Abstract: A system and device for, and method of, processing baseband signals to combat ISI and non-linearities on a communication system having a local loop. An actual alphabet is formed (471) from the signals actually transmitted on a channel (250). The alphabet may be used for symbol decoding (470), for example, and may avoid erroneous symbol predictions that could occur if an ideal or proscribed alphabet were used. Conventional phone systems have local loops with conventional line interfaces believed to have non-linearities vis-a-vis the proscribed companding algorithm. In particular, baseband signals created from the inverse quantization mechanisms inherent in conventional line interfaces have non-linear distortions. The actual alphabet therefore corresponds to the low fidelity signals actually transmitted by the line interface (250), with each symbol being an estimate of the signals actually transmitted (475). The estimate may be formed from an averaging function. An equalizer (460) may be used to combat ISI and other channel distortion. The alphabet and the equalizer may be updated with an error signal that is indicative of the accuracy of the alphabet's estimates (481).

公开(公告)号：AU663968B2

公开(公告)日：1995-10-26

申请号：AU4648893

申请日：1993-06-24

Applicant: MOTOROLA INC

Inventor： HLUCHYJ MICHAEL G ,  HUMBLET PIERRE A ,  LEE WHAY CHIOU

IPC: H04M3/00 ,  H04M7/00 ,  H04Q3/66 ,  H04Q3/64

Abstract: A fallback strategy for a system (700) and method (200) is provided for rerouting a call that fails to be established utilizing a first set of constraints in a communication network system. This strategy enables the communication network system to utilize a look-around-first type of preemption that avoids unnecessary preemption and provides alternate routing for a call according to predetermined constraints selected by a user.

公开(公告)号：GB2333662B

公开(公告)日：2001-07-04

申请号：GB9907894

申请日：1997-10-15

Applicant: MOTOROLA INC

Inventor： EYUBOGLU VEDAT M ,  BARABELL ARTHUR J ,  HUMBLET PIERRE A

IPC: H04M1/24 ,  H04J3/12 ,  H04L25/03 ,  H04L25/49 ,  H04B15/00 ,  H04L1/20 ,  H04L12/26 ,  H04L27/00 ,  H04L27/28 ,  H04M3/08 ,  H04M3/22

Abstract: A system and device for, and method of, detecting, characterizing, and mitigating deterministic distortion in a communication system. An exemplary communication system includes a digital adaptor for sending octets on to a backbone of a PSTN, which then sends, and potentially distorts the octets, received by a line interface. The line interface converts the octets to baseband signals received by an analog adaptor. Several mechanisms and methods are described in which the analog and digital adaptor cooperate to detect the presence of distortion, in particular, robbed bit signaling, on the communication system. The characterization may then be used to mitigate the effects of the distortion. Several receive constellations are provided, each constructed in view of the transmit constellation and in view of the manner in which the deterministic distortion will distort signals transmitted over the system. The receive constellations differ from the transmit constellation. The analog adaptor uses an appropriate receive constellation based on the type of distortion expected at a given interval. The digital adaptor may similarly include several constellation in view of the same considerations.

公开(公告)号：AU1586899A

公开(公告)日：1999-07-19

申请号：AU1586899

申请日：1998-11-13

Applicant: MOTOROLA INC

Inventor： KIM DAE-YOUNG ,  HUMBLET PIERRE A

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

Abstract: A transmitter in an analog pulse code modulation (PCM) modem (12) which transmits analog levels over an analog channel (18) to produce constellation points at a quantization device (26), wherein the constellation points correspond to groups of data bits to be transmitted to a digital PCM modem (28), the transmitter includes: a transmitter device which selects for each group of data bits to be transmitted a constellation point corresponding to the group of data bits and transmits over the analog channel a level that will produce at the input to the quantization device the selected constellation point; wherein the constellation points are chosen from a transmit constellation consisting of a plurality of non-uniformly spaced constellation points that have substantially equivalent, minimized error probability, constellation point to constellation point.