公开(公告)号：WO1992016054A1

公开(公告)日：1992-09-17

申请号：PCT/US1992001162

申请日：1992-02-12

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  BORTH, David, E. ,  RASKY, Phillip, D. ,  LING, Fuyun ,  EYUBOGLU, M., Vedat

IPC: H03M13/12

CPC classification number: H03M13/00 ,  H04B7/005

Abstract: A signal weighting system for associating a confidence level with portions of a communication signal transmitted upon a multipath channel (44) and received by a receiver (76). A signal received by the receiver is equalized by an equalizer circuit (60), such as a maximum likelihood sequence estimator (116), and the equalized signal generated thereby is supplied to an adaptive filter (92) which synthesizes portions of the multipath channel. The signal received by the receiver is altered responsive to values of a filtered, equalized signal generated by the adaptive filter.

公开(公告)号：WO1998013979A1

公开(公告)日：1998-04-02

申请号：PCT/US1997016909

申请日：1997-09-23

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  EYUBOGLU, M., Vedat ,  HUMBLET, Pierre, A.

IPC: H04L27/00

CPC classification number: H04L25/4927 ,  H04L25/03038

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).

Abstract translation: 一种用于处理基带信号以在具有本地环路的通信系统上对抗ISI和非线性的系统和设备及其方法。 从通道（250）上实际发送的信号形成实际字母（471）。 例如，字母表可以用于符号解码（470），并且可以避免如果使用理想或禁止的字母表时可能发生的错误符号预测。 传统的电话系统具有本地环路，其中传统的线路接口相对于被禁止的压扩算法而言具有非线性。 特别地，由常规线路接口固有的逆量化机制产生的基带信号具有非线性失真。 因此，实际字母表对应于由行界面（250）实际发送的低保真度信号，每个符号是实际发送的信号的估计（475）。 估计可以由平均函数形成。 均衡器（460）可用于对抗ISI和其他信道失真。 字母表和均衡器可以用指示字母表估计的准确性的错误信号来更新（481）。

公开(公告)号：WO1993010607A1

公开(公告)日：1993-05-27

申请号：PCT/US1992008294

申请日：1992-09-30

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LONG, Guozhu ,  LING, Fuyun ,  EYUBOGLU, M., Vedat

IPC: H04J01/00

CPC classification number: H04B3/235 ,  H04B3/232

Abstract: A device and method utilize a linear feedback/feedforward configuration to estimate and cancel a listener echo wherein equalizer (202) and listener echo cancellation (204 and 208) units are jointly updated, allowing determination of an error signal once (204 and 208), in place of the former method of separate error signal determination for each of an equalizer and a listener echo canceller. An improved phase-correction scheme is utlized to compensate the frequency offset in the listener echo. The relationship between the listener echo and talker far echo is utilized to facilitate the listener echo cancellation.

Abstract translation: 一种设备和方法利用线性反馈/前馈配置来估计和消除收听者回声，其中均衡器（202）和收听者回声消除（204和208）单元被联合更新，允许确定一次错误信号（204和208） 代替均衡器和收听回波消除器中的每一个的单独的误差信号确定的前一种方法。 改进的相位校正方案被用来补偿收听者回波中的频率偏移。 听众回声和讲话者远端回声之间的关系被用来促进听众回声消除。

公开(公告)号：WO1995002291A1

公开(公告)日：1995-01-19

申请号：PCT/US1994007109

申请日：1994-06-24

Applicant: CODEX, INC., a subsidiary company of MOTOROLA INC.

Inventor： CODEX, INC., a subsidiary company of MOTOROLA INC. ,  EYUBOGLU, M., Vedat ,  FULLING, Frank ,  MINER, Mark

IPC: H04L05/12

CPC classification number: H04L25/4975 ,  H04L25/03343 ,  H04L25/497 ,  H04L27/3411

Abstract: An improved precoding technique (700) and device (100) allows transmission of a signal point sequence over a channel h(D) to provide efficient data transfer in the presence of intersymbol interference and noise at data rates approaching channel capacity. This improved technique works with trelliscoded modulation and with any signal constellation (502). Thus the present invention simplifies shaping and allows signaling at fractional rates without constellation switching. A key advantage of the present invention over prior art is its ability to achieve reduced dither loss by selecting the output components of a mapper based on past components of a channel output sequence.

Abstract translation: 改进的预编码技术（700）和设备（100）允许在信道h（D）上传输信号点序列，以在接近信道容量的数据速率存在码间干扰和噪声的情况下提供有效的数据传输。 这种改进的技术与trelliscoded调制和任何信号星座（502）一起工作。 因此，本发明简化了整形并且允许以分数速率进行信令而不进行星座切换。 本发明相对于现有技术的一个主要优点是其能够通过基于通道输出序列的过去分量来选择映射器的输出分量来实现减少的抖动损耗。

公开(公告)号：EP0974209A1

公开(公告)日：2000-01-26

申请号：EP98914478.7

申请日：1998-04-03

Applicant: MOTOROLA, INC.

Inventor： EYUBOGLU, M., Vedat ,  KIM, Dae-Young ,  TUNG, Chien-Cheng

IPC: H04B14/04 ,  H04K1/10

CPC classification number: H04B14/04 ,  H04L25/4927

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：EP0572579B1

公开(公告)日：1999-12-08

申请号：EP92921514.3

申请日：1992-09-30

Applicant: MOTOROLA, INC.

Inventor： LONG, Guozhu ,  LING, Fuyun ,  EYUBOGLU, M., Vedat

IPC: H04J1/00 ,  H04B3/23

CPC classification number: H04B3/235 ,  H04B3/232

公开(公告)号：EP0672321A1

公开(公告)日：1995-09-20

申请号：EP94921369.0

申请日：1994-06-24

Applicant: CODEX, INC., a subsidiary company of MOTOROLA INC.

Inventor： EYUBOGLU, M., Vedat

IPC: H03M5 ,  H03M13 ,  H04L25 ,  H04L27

CPC classification number: H04L25/4975 ,  H04L25/03343 ,  H04L25/497 ,  H04L27/3411

Abstract: An improved precoding technique (700) and device (100) allows transmission of a signal point sequence over a channel h(D) to provide efficient data transfer in the presence of intersymbol interference and noise at data rates approaching channel capacity. This improved technique works with trelliscoded modulation and with any signal constellation (502). Thus the present invention simplifies shaping and allows signaling at fractional rates without constellation switching. A key advantage of the present invention over prior art is its ability to achieve reduced dither loss by selecting the output components of a mapper based on past components of a channel output sequence.

公开(公告)号：EP0572579A1

公开(公告)日：1993-12-08

申请号：EP92921514.0

申请日：1992-09-30

Applicant: MOTOROLA, INC.

Inventor： LONG, Guozhu ,  LING, Fuyun ,  EYUBOGLU, M., Vedat

IPC: H04B3

CPC classification number: H04B3/235 ,  H04B3/232

Abstract: Un dispositif et un procédé utilisent une configuration retour/anticipation linéaire afin d'estimer et de supprimer l'écho d'un récepteur, dans laquelle un égaliseur (202) et des unités (204 et 208) de suppression d'écho du récepteur sont conjointement mises à jour, ce qui permet la détermination d'un signal d'erreur une fois (204 et 208), à la place du procédé antérieur de détermination de signal d'erreur séparé pour un égaliseur et un suppresseur d'écho de récepteur. On utilise une technique améliorée de correction de phase afin de compenser le décalage de fréquence dans l'écho du récepteur. La relation entre l'écho du récepteur et l'écho distant de l'émetteur est utilisée afin de faciliter la suppression de l'écho du récepteur.

公开(公告)号：WO1998017044A2

公开(公告)日：1998-04-23

申请号：PCT/US1997018554

申请日：1997-10-15

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  EYUBOGLU, M., Vedat ,  BARABELL, Arthur, J. ,  HUMBLET, Pierre, A.

IPC: H04M00/00

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

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 constellations in view of the same considerations

Abstract translation: 用于通信系统中的确定性失真的系统和设备，以及检测，表征和减轻确定性失真的方法。 示例性通信系统包括用于将八位字节发送到PSTN的骨干网的数字适配器，然后PSTN发送并潜在地扭曲由线路接口接收的八位字节。 线路接口将八位字节转换为模拟适配器接收的基带信号。 描述了几种机构和方法，其中模拟和数字适配器协作以在通信系统上检测失真的存在，特别是盗位信令。 然后可以使用表征来减轻失真的影响。 提供了几个接收星座，每个都是根据发射星座构建的，并且鉴于确定性失真会使通过系统传输的信号失真的方式。 接收星座与发射星座不同。 模拟适配器使用基于给定间隔期望的失真类型的适当的接收星座。 考虑到相同的考虑，数字适配器可以类似地包括几个星座

公开(公告)号：WO1998013977A1

公开(公告)日：1998-04-02

申请号：PCT/US1997016936

申请日：1997-09-19

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  EYUBOGLU, M., Vedat ,  HUMBLET, Pierre, A.

IPC: H04L25/34

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.

Abstract translation: 发射机（56），用于通过数字网络发送八位字节序列，数字网络将八位字节转换成一系列级别，发射机包括：映射设备（74）为每组数据比特输出一个或多个 水平; 电平选择器（76），用于选择等同类中的电平以表示要发送的数据位组; 滤波器装置（78），其在其输入处接收先前选择的电平并将其输出提供给电平选择器，其中电平选择器（76）根据滤波器装置（78）的输出选择要传输的电平; 和八位位组转换器（80），其在其输入处接收所选择的电平，并且在所述数字网络上发送与所选电平相对应的八位字节，以在所发送的八位字节被转换成数字的电平时产生具有预定频谱形状的模拟信号 网络。