公开(公告)号：WO2016071339A1

公开(公告)日：2016-05-12

申请号：PCT/EP2015/075601

申请日：2015-11-03

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

Inventor： HILDINGER, Rainer ,  TASCH, Andreas ,  ZAREI, Shahram ,  ZERNA, Conrad ,  DÄUMLER, Matthias ,  RUIZ CABRERA, Carlos ,  KOCH, Robert

IPC: H04L25/03 ,  H04L25/497

CPC classification number: H04L25/4975 ,  H04L25/03343 ,  H04L2025/03356 ,  H04L2025/0377

Abstract: Eine Sendeeinrichtung zum Senden eines Ausgangssignals umfasst eine erste und eine zweite Filterstruktur. Die erste Filterstruktur umfasst einen ersten Kombinierer, der ausgebildet ist, um ein erstes Datensignal um ein erstes Referenzsignal zu erweitern, um ein erstes erweitertes Datensignal zu erhalten und mit einem ersten IlR-Filter zum Filtern des ersten erweiterten Datensignals, um ein erstes gefiltertes Datensignal zu erhalten. Die zweite Filterstruktur umfasst einen zweiten Kombinierer, der ausgebildet ist, um ein zweites Datensignal um ein zweites Referenzsignal zu erweitern, um ein zweites erweitertes Datensignal zu erhalten und mit einem zweiten IlR-Filter zum Filtern des zweiten erweiterten Datensignals, um ein zweites gefiltertes Datensignal zu erhalten. Die Sendeeinrichtung umfasst einen Multiplexer zum Kombinieren des ersten und des zweiten gefilterten Datensignals, um das Ausgangssignal basierend auf den gefilterten Datensignalen zu erhalten. Eine Systemantwort des ersten IIR-Filters basierend auf dem ersten Referenzsignal entspricht einer Systemantwort des zweiten IIR-Filters basierend auf dem zweiten Referenzsignal.

Abstract translation: 发送装置，用于发送包括第一和第二过滤器结构的输出信号。 第一滤波器结构包括第一组合器，其被配置为扩展的第一数据信号的第一参考信号，以获得第一扩展数据信号，并具有用于过滤所述第一扩展数据信号，以产生第一滤波的数据信号的第一ILR滤波器 接收。 第二滤波器结构包括第二组合器，其被设计成增强第二数据信号到第二参考信号以获得第二扩展数据信号和与第二ILR滤波器，用于过滤所述第二扩展数据信号以产生第二滤波的数据信号 接收。 所述发送装置包括用于在第一和第二滤波后的数据信号，以获得基于经过滤的数据信号的输出信号进行组合的复用器。 基于对应于基于所述第二参考信号的第二IIR滤波器的系统响应所述第一参考信号的第一IIR滤波器的系统响应。

公开(公告)号：WO2007044484A2

公开(公告)日：2007-04-19

申请号：PCT/US2006039025

申请日：2006-10-06

Applicant: UNIV WASHINGTON ,  LIU HUI ,  LIU BIN

Inventor： LIU HUI ,  LIU BIN

IPC: B63H9/04

CPC classification number: H04L25/03343 ,  H04L1/0066 ,  H04L25/497 ,  H04L25/4975 ,  H04L27/3488 ,  H04L2025/0342

Abstract: A dirty paper precoding ("DPC") method for broadcasting a signal is disclosed that takes advantage of knowledge of the structure of interference in order to avoid the quantization noise that results in the conventional DPC method. The proposed method modifies the Tomlinson-Harishima precoding ("THP") scheme by selecting a constellation and mapping scheme that is designed based on the known interference modulation structure of the interference signal, which is typically directed to a second receiver. In a particular embodiment, a source signal and an interference signal are QAM modulated. The modulation structure information of the interference signal is known to the receiver. At the transmitter the source signal is precoded based on the known interference structure, and a common mapping rule is implemented, such that the received signal can be decoded at the receiver without requiring a modulo operation at either the transmitter or receiver.

Abstract translation: 公开了一种用于广播信号的脏纸预编码（“DPC”）方法，其利用干扰结构的知识，以避免导致常规DPC方法的量化噪声。 所提出的方法通过选择基于干扰信号的已知干扰调制结构设计的星座和映射方案来修改Tomlinson-Harishima预编码（“THP”）方案，该干扰信号通常指向第二接收机。 在特定实施例中，源信号和干扰信号被QAM调制。 接收机已知干扰信号的调制结构信息。 在发射机处，基于已知的干扰结构对源信号进行预编码，并且实现公共映射规则，使得接收信号可以在接收机处被解码，而不需要在发射机或接收机处进行模运算。

公开(公告)号：WO2004023750A1

公开(公告)日：2004-03-18

申请号：PCT/IB2003/003415

申请日：2003-08-04

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  TOMASIN, Stefano ,  BENVENUTO, Nevio

Inventor： TOMASIN, Stefano ,  BENVENUTO, Nevio

IPC: H04L25/03

CPC classification number: H04L25/4975 ,  H04L25/03159 ,  H04L25/03343 ,  H04L25/497 ,  H04L27/2634 ,  H04L27/264 ,  H04L27/265 ,  H04L2025/03414

Abstract: Filterbank-based modulation systems comprise sender-processors (20,30) with inverse-fast-fourier-transformating-modules (23,33) and filtering-modules (24,34) and comprise receiver-processors (40) with fast-fourier-transformating-modules (43). Interference caused by said filtering-modules (24,34) is reduced by, in said sender-processors (20,30), introducing coding-modules (22,32) with further-filtering-modules (26,36) in feedback loops, and by, in said receiver-processors (40), introducing decoding-modules (44). Splitting-modules (21,31,41) and combining-modules (25,35,45) allow the use of signal streams and parallel filterbanks. Coding-modules (22 resp. 32) comprise sub-coding-modules (22-1,22-2,....,22-a or 32-1,32-2,....,32-b), filtering-modules (24 resp. 34) comprise sub-filtering-modules (24-1,24-2,....,24-a or 34-1,34-2,....,34-b), further-filtering-modules (26 resp. 36) comprise sub-further-filtering-modules (26-1,26-2,....,26-a or 36-1,36-2,....,36-b), and decoding-modules (44) comprise sub-decoding-modules (44-1,44-2,....,44-c), all per signal stream. The sub-further-filtering-modules either receive input signals from outputs of said inverse-fast-fourier-transformating-modules and supply output signals via fast-fourier-transformating-modules to inputs of said sub-coding-modules via adding/subtracting-modules for reducing interference per signal stream (or per subcarrier/subband), or receive input signals from outputs of said sub-coding-modules and supply output signal to inputs of said sub-coding-modules via adding/subtracting-modules for reducing interference per signal stream (or per subcarrier/subband) as well as between signal streams (or between subcarriers/subbands) and introducing so-called fractionally spaced filterbank-based modulation systems.

Abstract translation: 基于滤波器组的调制系统包括具有反快速傅立叶变换模块（23,33）和滤波模块（24,34）的发送器 - 处理器（20,30），并且包括具有快速傅立叶变换的接收器 - 处理器（40） 转换模块（43）。 在所述发送器 - 处理器（20,30）中，由所述滤波模块（24,34）引起的干扰减少，在反馈回路中引入具有进一步滤波模块（26,36）的编码模块（22,32） ，并且在所述接收机处理器（40）中引入解码模块（44）。 分离模块（21,31,41）和组合模块（25,35,45）允许使用信号流和并行滤波器组。 编码模块（22或32）包括子编码模块（22-1,22-2，....，22-a或32-1,32-2，...，32-b） ，过滤模块（24或34）包括子过滤模块（24-1,24-2，....，24-a或34-1,34-2，...，34-b ），进一步过滤模块（26或36）包括子进一步过滤模块（26-1,26-2，...，26-a或36-1,36-2，...） ，36-b）和解码模块（44）包括子解码模块（44-1,42-2，...，44-c），全部是每个信号流。 子进一步滤波模块或者从所述反快速傅里叶变换模块的输出端接收输入信号，并通过快速傅里叶变换模块将输出信号经由加法/减法输入到所述子编码模块的输入 - 用于减少每个信号流（或每个子载波/子频带）的干扰，或者从所述子编码模块的输出接收输入信号，并通过用于减少的子模块的加/减模块将输出信号提供给所述子编码模块的输入 每个信号流（或每个子载波/子带）的干扰以及信号流之间（或子载波/子带之间）的干扰，并引入所谓的基于分数的基于滤波器组的调制系统。

公开(公告)号：WO03013048A9

公开(公告)日：2003-04-10

申请号：PCT/US0224401

申请日：2002-07-31

Applicant: GLOBESPAN VIRATA INC

Inventor： GRAZIANO MICHAEL J ,  CHEN TSUNG-LIANG ,  CHARI SUJAI ,  LUK-PAT GERARD T ,  LEUNG ERIC TSING-HO

IPC: G06F7/556 ,  H04L1/00 ,  H04L5/02 ,  H04L5/14 ,  H04M11/06 ,  H04L5/15

CPC classification number: G06F7/556 ,  H04L1/0001 ,  H04L1/0002 ,  H04L5/023 ,  H04L5/1446 ,  H04L25/4975 ,  Y02D50/10

Abstract: The present invention is directed to methods and systems for determining maximum power backoff for modems operating according to G.SHDSL and other standards using frequency domain geometric signal to noise ratio (SNR). In one example, a G.SHDSL standard may specify a minimum power back off (PBO) that may be required for modem implementation. Although the standard specifies the minimum back off, it is desirable to be able to increase the POB beyond this level. The reasons for this may include reduced power consumption and reduced crosstalk generated by a modem. The present invention discloses a method and system for determining an absolute maximum power PBO that may be tolerated and still meet bit error rate (BER) and/or other requirements. The present invention implements a geometric mean to compute SNR in a frequency domain over a pass-band of a transmit spectrum.

Abstract translation: 本发明涉及用于根据G.SHDSL和其他使用频域几何信噪比（SNR）的标准来操作的调制解调器的最大功率回退的方法和系统。 在一个示例中，G.SHDSL标准可以指定调制解调器实现所需的最小功率回退（PBO）。 虽然标准规定了最小回退，但是希望能够将POB提高到该水平以上。 其原因可能包括降低功耗并减少调制解调器产生的串扰。 本发明公开了一种用于确定绝对最大功率PBO的方法和系统，该绝对最大功率PBO可以被容忍并且仍然满足误码率（BER）和/或其它要求。 本发明实现了在发射频谱的通带上计算频域中的SNR的几何平均值。

公开(公告)号：WO0178241A3

公开(公告)日：2002-05-16

申请号：PCT/US0111162

申请日：2001-04-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LEE-FANG WEI

IPC: H04L1/00 ,  H04L25/03 ,  H04L25/49 ,  H04L25/497 ,  H04B3/32

CPC classification number: H04L1/006 ,  H04L1/0041 ,  H04L1/0054 ,  H04L25/03343 ,  H04L25/4927 ,  H04L25/497 ,  H04L25/4975

Abstract: A process transmits digital data to an A/D converter via an analog channel. The process includes generating a sequence of output signals by precoding a sequence of input signal points to precompensate for ISI in the analog channel. In the precoding is matched to the ISI, at least one of the output signals would be disorted by the ISI to a signal representative of a signal point lying between quantization levels of the A/D covnerter. If the precoding is matched to the ISI, others of the output signals would be distorted by the ISI to signals representative of signal points that are quantization levels of the A/D converter. A majority of the input signal points are quantization levels of the A/D converter.

Abstract translation: 一个过程通过模拟通道将数字数据发送到A / D转换器。 该过程包括通过预编码输入信号点的序列来产生输出信号序列，以对模拟信道中的ISI进行预补偿。 在预编码与ISI匹配时，输出信号中的至少一个将由ISI分散到表示位于A / D协调器的量化级之间的信号点的信号。 如果预编码与ISI匹配，则输出信号中的其他输出信号将被代表作为A / D转换器的量化级的信号点的信号的ISI变形。 大多数输入信号点是A / D转换器的量化级。

公开(公告)号：WO0113516A3

公开(公告)日：2001-08-23

申请号：PCT/US0022017

申请日：2000-08-11

Applicant: JAFFE STEVEN T ,  JOSHI ROBINDRA ,  JONES DAVID ,  LIN THUJI SIMON ,  BROADCOM CORP

Inventor： JAFFE STEVEN T ,  JOSHI ROBINDRA ,  JONES DAVID ,  LIN THUJI SIMON

IPC: H03H21/00 ,  H04L25/03

CPC classification number: H04L25/4975 ,  H03H21/0012 ,  H04L25/03343 ,  H04L25/03993 ,  H04L2025/0349 ,  H04L2025/03808

Abstract: A feedforward filter (20) has a plurality of feedforward filter taps (23a-23g), including a feedforward filter reference tap (23d). The reference tap of the feedforward filter is positioned proximate a center position of the feedforward filter. A ramping circuit (604) assembly has an input port configured to receive at least one decision feedback filter tap coefficient from a decision feedback filter. A coefficient ramping circuit is configured to provide a ramped output for at least one of the decision feedback filter tap coefficients. The ramped output is varied over time from a first value to a second value. The second value is dependent upon the value of a decision feedback filter tap coefficient. An output port of the ramping circuit assembly is configured to communicate information representative of the ramped output(s) to a precoder (603).

公开(公告)号：WO9839869A3

公开(公告)日：1998-12-17

申请号：PCT/US9804182

申请日：1998-03-04

Applicant: PARADYNE CORP

Inventor： BETTS WILLIAM L

IPC: H04L25/03 ,  H04L25/06 ,  H04L27/34 ,  H04L

CPC classification number: H04L25/4975 ,  H04L25/03006 ,  H04L25/03343 ,  H04L25/03993 ,  H04L25/061 ,  H04L27/3411 ,  H04L27/3477

Abstract: A system (Fig. 3) and method for communicating information using circular multidimensional signal space constellations (Fig. 1b) using uncoded modulation allows increased data rate and bandwidth by eliminating trellis encoding, thus reducing the number of computational cycles required for coding. Furthermore, the use of circular signal space constellations (Fig. 1b) lowers the transmit peak factor, thus consuming less power. Using uncoded modulations with circular constellations allows an approximate 10-20 % performance improvement for a given central processor unit. Additionally, circular constellations (Fig. 1b) allow the easy and reliable transmission of special marker symbols such as 'End of File', 'Start of Message', 'End of Transmission' or 'Increase or Decrease Data Rate'.

公开(公告)号：WO1996016405A1

公开(公告)日：1996-05-30

申请号：PCT/US1995015221

申请日：1995-11-21

Applicant: OPTEX CORPORATION ,  AT & T CORP.

Inventor： OPTEX CORPORATION ,  AT & T CORP. ,  McLAUGHLIN, Steven, W. ,  CALDERBANK, A., Robert ,  LAROIA, Rajiv ,  GERPHEIDE, John, M.

IPC: G11B20/10

CPC classification number: H04L25/4975 ,  G11B7/013 ,  G11B20/10009 ,  G11B20/1496

Abstract: A system and method for recording multi-level data to a multi-amplitude recording channel encodes binary data to form multi-level data. The multi-level data are recorded to the storage media for later recall. The system utilizes linear, multi-amplitude recording media which allows data to be stored as multi-level data - requiring fewer "bits" to represent the same number of symbols. To obtain greater data density in the storage media, a diffraction limited write laser is utilized, resulting in a smaller write-spot size. Because the read laser is of a longer wavelength, its diffraction limited spot size is larger. As a result, more than one mark is read at a given read time resulting in an inter-symbol interference. Trellis coded modulation techniques are adopted to convert the binary input data into M-ary data having M levels. Further coding is then performed to compensate for the effects of the intersymbol interference. This is accomplished by precoding the data using a Tomlinson-Harashima precoder. The precoding results in multi-level data (of m levels, where m

Abstract translation: 用于将多级数据记录到多幅度记录通道的系统和方法对二进制数据进行编码以形成多级数据。 多级数据被记录到存储介质以供以后调用。 该系统利用线性，多幅度记录介质，允许将数据存储为多级数据 - 需要较少的“位”来表示相同数量的符号。 为了在存储介质中获得更大的数据密度，利用衍射限制写入激光器，导致较小的写入点尺寸。 因为读取激光器的波长较长，其衍射受限光斑尺寸较大。 结果，在给定的读取时间读取多于一个标记，导致符号间干扰。 采用网格编码调制技术将二进制输入数据转换为具有M级的M元数据。 然后执行进一步编码以补偿符号间干扰的影响。 这是通过使用Tomlinson-Harashima预编码器预编码数据来实现的。 预编码导致多级数据（m级，其中m

公开(公告)号：WO1992019055A1

公开(公告)日：1992-10-29

申请号：PCT/US1992001850

申请日：1992-03-06

Applicant: RACAL-DATACOM, INC.

Inventor： RACAL-DATACOM, INC. ,  KRISHNAN, Vedavalli, G.

IPC: H04L05/12

CPC classification number: H04L25/4975 ,  H04L25/03343 ,  H04L27/3472

Abstract: Disclosed is a method and apparatus in a communications device (30) for mapping a selected group of data bits into a predetermined number of two-dimensional symbols selected from a minimized alphabet of M two-dimensional symbols (A, B and C) forming a symbol constellation, with one of the two-dimensional symbols (A, B and C) being transmitted during each symbol (i.e., baud) interval.

Abstract translation: 公开了一种通信设备（30）中的方法和装置，用于将所选择的数据比特组映射到从M个二维符号（A，B和C）的最小化字母表中选择的预定数量的二维符号中，形成 符号星座，其中在每个符号（即，波特）间隔期间发送二维符号（A，B和C）之一。

公开(公告)号：WO2017101999A1

公开(公告)日：2017-06-22

申请号：PCT/EP2015/080080

申请日：2015-12-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  ZAIDI, Abdellatif ,  TOMASIN, Stefano

Inventor： ZAIDI, Abdellatif ,  TOMASIN, Stefano

IPC: H04L25/03 ,  H04L25/497

CPC classification number: H04L25/03955 ,  H04L25/03343 ,  H04L25/03974 ,  H04L25/4975

Abstract: The disclosure relates to a precoding device (300) for cancelling asymmetrically known interference, the precoding device (300) comprising: a first transmitter node (Tx1) configured to generate a first input signal (X 1 ) carrying a first message (c W1 ) intended for transmission to a first reception node (Rx1); a second transmitter node (Tx2) configured to generate a second input signal (X 2 ) carrying a second message (C W2 ) intended for transmission to the first reception node (Rx1) and an interference signal (X) intended for transmission to another reception node (Rx2), wherein the interference signal (X) is an asymmetrically known interference signal that is known to the second transmitter node (Tx2) and unknown to the first transmitter node (Tx1 ), wherein the second transmitter node (Tx2) comprises: an interference canceller (305) configured to cancel part of the interference signal (X) to generate a partially cancelled interference signal (X c ), and a precoder (303), configured to use a lattice-based precoding scheme to precode the second message (W 2 ) with the non-cancelled part (X nc ) of the interference signal (X) to generate a precoded signal (X 2W ), wherein the second transmitter node (Tx2) is configured to generate the second input signal (X 2 ) based on the partially cancelled interference signal (X c ) and the precoded signal (X 2W ).

Abstract translation: 本公开涉及用于消除非对称已知干扰的预编码设备（300），所述预编码设备（300）包括：第一发射机节点（Tx1），被配置为生成第一输入信号（X