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1. 发明授权

US06570915B1 DSL auto baud 有权
标题翻译： DSL自动波特率
公开(公告)号：US06570915B1
公开(公告)日：2003-05-27
申请号：US09629563
申请日：2000-07-31
申请人： Ralph F. Sweitzer , Dean E. Rasmussen , Mickey C. Rushing
发明人： Ralph F. Sweitzer , Dean E. Rasmussen , Mickey C. Rushing
IPC分类号： H04B1700
CPC分类号： H04L1/0002 , H04L5/1446 , Y02D50/10
摘要： A DSL communication system including a DSL transmission unit at a central office (DTU-C) and a DSL transmission unit at a remote location (DTU-R) in communication over a communication link. DTU-C and DTU-R are capable of transmitting and receiving packets of data prior to synchronization or training. DTU-C transmits a discovery message to DTU-R and awaits receiving a discovery response message from DTU-R. After receiving the discovery response message, DTU-C transmits a probe message to DTU-R followed by a probe signal. DTU-R measures the line quality while receiving the probe signal. After receiving the probe signal, DTU-R transmits a probe signal to DTU-C, using which signal DTU-C measures the line quality. After transmitting the probe signal, DTU-R transmits a probe response message, including line quality measurements performed by DTU-R. DTU-C and DTU-R may negotiate a first data rate by transmitting data rate messages based on the line quality measurements. DTU-C and DTU-R synchronize or train at the first data rate. After synchronization, DTU-C and/or DTU-R measure the line quality at the first data rate. The line quality may be measured based on bit-error-rate, attenuation level and/or signal-to-noise ratio. A second data rate is then selected based on the line quality measurements. DTU-C may then initiate a rate change request, according to which DTU-C and DTU-R may re-synchronize at the second rate.
摘要翻译：一种DSL通信系统，包括通过通信链路进行通信的中心局（DTU-C）处的DSL传输单元和远程位置（DTU-R）的DSL传输单元。 DTU-C和DTU-R能够在同步或训练之前发送和接收数据包。 DTU-C将发现消息发送到DTU-R，并等待从DTU-R接收发现响应消息。在接收到发现响应消息之后，DTU-C向DTU-R发送探测消息，接着是探测信号。 DTU-R在接收探头信号时测量线路质量。 DTU-R接收到探测信号后，使用哪个信号DTU-C测量线路质量，向DTU-C发送探测信号。发送探测信号后，DTU-R发送探测响应消息，包括由DTU-R执行的线路质量测量。 DTU-C和DTU-R可以通过基于线路质量测量发送数据速率消息来协商第一数据速率。 DTU-C和DTU-R以第一个数据速率同步或训练。同步后，DTU-C和/或DTU-R以第一个数据速率测量线路质量。可以基于误码率，衰减水平和/或信噪比来测量线路质量。然后基于线路质量测量选择第二数据速率。然后，DTU-C可以发起速率改变请求，根据该请求，DTU-C和DTU-R可以以第二速率重新同步。

2. 发明授权

US5654982A Apparatus and method for determining carrier frequency offset and timing frequency offset for data transmission and reception 失效
标题翻译：用于确定数据传输和接收的载波频率偏移和定时频率偏移的装置和方法
公开(公告)号：US5654982A
公开(公告)日：1997-08-05
申请号：US496640
申请日：1995-06-29
申请人： Richard L. Goodson , Mickey C. Rushing , Gary D. Hunt , Lee T. Gusler
发明人： Richard L. Goodson , Mickey C. Rushing , Gary D. Hunt , Lee T. Gusler
IPC分类号： H04L7/027 , H04L7/08 , H04L27/38 , H04B1/38
CPC分类号： H04L27/38 , H04L7/027 , H04L7/08
摘要： An apparatus and method for a data communications device such as a modem (100, 101) to determine carrier frequency offset and timing frequency offset, from a received probe signal. The various embodiments utilizing a processor (108) or digital signal processor (106) receive first and second sets of a transmitted probe signal having known characteristics, and determine a set of phase differences for the tones comprising the probe signal (702, 703, 704, 705). The various method and apparatus embodiments then form a linear approximation from the set of phase differences to determine the carrier frequency offset and the timing frequency offset (706). In the preferred embodiments, the linear approximation is formed from a minimization of a least square error estimate proportionally weighted by either signal to noise ratios or normalized, average amplitudes of the set of tones of the received probe signal.
摘要翻译：一种用于诸如调制解调器（100,101）的数据通信设备的装置和方法，用于从接收到的探测信号确定载波频率偏移和定时频率偏移。利用处理器（108）或数字信号处理器（106）的各种实施例接收具有已知特性的已发射探测信号的第一和第二组，并且确定包含探测信号（702,703,704）的音调的一组相位差，705）。各种方法和装置实施例然后从相位差集合形成线性近似以确定载波频率偏移和定时频率偏移（706）。在优选实施例中，由最小二乘误差估计的最小化形成线性近似，该最小二乘误差估计是由接收的探测信号的信噪比或归一化的平均振幅组合加权的。

3. 发明授权

US06546046B1 DSL pre-synchronization auto baud 有权
标题翻译： DSL预同步自动波特率
公开(公告)号：US06546046B1
公开(公告)日：2003-04-08
申请号：US09629565
申请日：2000-07-31
申请人： Ralph F. Sweitzer , Dean E. Rasmussen , Mickey C. Rushing
发明人： Ralph F. Sweitzer , Dean E. Rasmussen , Mickey C. Rushing
IPC分类号： H04B1700
CPC分类号： H04L1/0002 , H04L5/1446
摘要： A DSL communication system including a DSL transmission unit at a central office (DTU-C) and a DSL transmission unit at a remote location (DTU-R) in communication over a communication link. DTU-C and DTU-R are capable of transmitting and receiving packets of data prior to synchronization or training. DTU-C transmits a discovery message to DTU-R and awaits receiving a discovery response message from DTU-R. After receiving the discovery response message, DTU-C transmits a probe message to DTU-R followed by a probe signal. DTU-R measures the line quality while receiving the probe signal. After receiving the probe signal, DTU-R transmits a probe signal to DTU-C, using which signal DTU-C measures the line quality. After transmitting the probe signal, DTU-R transmits a probe response message, including line quality measurements performed by DTU-R. DTU-C and DTU-R may negotiate a startup data rate by transmitting data rate messages based on the line quality measurements and/or based on other information that may be exchanged between DTU-C and DTU-R.
摘要翻译：一种DSL通信系统，包括通过通信链路进行通信的中心局（DTU-C）处的DSL传输单元和远程位置（DTU-R）的DSL传输单元。 DTU-C和DTU-R能够在同步或训练之前发送和接收数据包。 DTU-C将发现消息发送到DTU-R，并等待从DTU-R接收发现响应消息。在接收到发现响应消息之后，DTU-C向DTU-R发送探测消息，接着是探测信号。 DTU-R在接收探头信号时测量线路质量。 DTU-R接收到探测信号后，使用哪个信号DTU-C测量线路质量，向DTU-C发送探测信号。发送探测信号后，DTU-R发送探测响应消息，包括由DTU-R执行的线路质量测量。 DTU-C和DTU-R可以通过基于线路质量测量和/或基于可以在DTU-C和DTU-R之间交换的其他信息发送数据速率消息来协商启动数据速率。

4. 发明授权

US5434884A Apparatus and method for equalizing for amplitude jitter 失效
标题翻译：用于均衡振幅抖动的装置和方法
公开(公告)号：US5434884A
公开(公告)日：1995-07-18
申请号：US317429
申请日：1994-10-04
申请人： Mickey C. Rushing , Steven R. Blackwell
发明人： Mickey C. Rushing , Steven R. Blackwell
IPC分类号： H04B3/00 , H04B7/005 , H04L27/38 , H03H7/30
CPC分类号： H04L27/3872
摘要： A modem (100) includes an equalizer for equalizing a received signal (10) for amplitude jitter distortion. The received signal includes modulated symbols based on a predetermined constellation of points, each point representing a symbol. The modem first extracts a modulated symbol to provide an extracted symbol, R(k), which includes amplitude jitter distortion. The modem then identifies a signal point P.sub.n (k) of the predetermined constellation corresponding to the extracted symbol. Further, the modem determines an error signal (76) based on the amplitude jitter distortion, and then uses the error signal to compensate subsequent extracted symbols for the amplitude jitter distortion.
摘要翻译：调制解调器（100）包括用于均衡用于振幅抖动失真的接收信号（10）的均衡器。所接收的信号包括基于点的预定星座的调制符号，每个点表示符号。调制解调器首先提取调制符号以提供包括振幅抖动失真的提取符号R（k）。然后，调制解调器识别与提取的符号对应的预定星座的信号点Pn（k）。此外，调制解调器基于振幅抖动失真来确定误差信号（76），然后使用误差信号来补偿随后提取的符号以获得幅度抖动失真。

5. 发明授权

US5715277A Apparatus and method for determining a symbol rate and a carrier frequency for data transmission and reception 失效
标题翻译：用于确定数据发送和接收的符号率和载波频率的装置和方法
公开(公告)号：US5715277A
公开(公告)日：1998-02-03
申请号：US508853
申请日：1995-07-28
申请人： Richard L. Goodson , Lee T. Gusler, Jr. , Gary D. Hunt , Mickey C. Rushing
发明人： Richard L. Goodson , Lee T. Gusler, Jr. , Gary D. Hunt , Mickey C. Rushing
IPC分类号： H04L1/00 , H04L5/14 , H04B1/38
CPC分类号： H04L1/0002 , H04L1/0001 , H04L5/1446
摘要： An apparatus and method for a data communications device, such as a modem (100, 101), to determine a symbol rate and carrier frequency combination, from a received probe signal, for optimizing a bit rate for data transmission and reception. The various embodiments utilizing a processor (108) or a digital signal processor (106) receive a probe signal, which also typically contains noise and other distortions. The various method and apparatus embodiments then determine signal to distortion ratios for a plurality of symbol rate and carrier frequency combinations (820), and other optimization parameters, such as channel characteristics and attenuation distortion parameters (830). These optimization parameters are then utilized to determine an optimal symbol rate and carrier frequency (840).
摘要翻译：一种用于数据通信设备（诸如调制解调器（100,101））的设备和方法，用于从接收到的探测信号确定符号速率和载波频率组合，以优化用于数据传输和接收的比特率。利用处理器（108）或数字信号处理器（106）的各种实施例接收探测信号，其也通常包含噪声和其它失真。各种方法和装置实施例然后确定多个符号速率和载波频率组合（820）以及诸如信道特性和衰减失真参数（830）的其它优化参数的信号到失真比。然后利用这些优化参数来确定最佳符号速率和载波频率（840）。

6. 发明授权

US5636244A Method and apparatus for initializing equalizer coefficents using peridioc training sequences 失效
标题翻译：使用peridioc训练序列初始化均衡器系数的方法和装置
公开(公告)号：US5636244A
公开(公告)日：1997-06-03
申请号：US507175
申请日：1995-07-26
申请人： Richard L. Goodson , Lee T. Gusler, Jr. , Mickey C. Rushing
发明人： Richard L. Goodson , Lee T. Gusler, Jr. , Mickey C. Rushing
IPC分类号： H04L25/03 , H04B3/04 , G06F17/14
CPC分类号： H04L25/03044 , H04L2025/03509 , H04L2025/03656 , H04L2025/03726
摘要： An apparatus and method for a data communications device such as a modem (100) to generate initial coefficient values for an equalizer (440) from a transmitted training signal received via a channel, in which the transmitted training signal has predetermined characteristics. The apparatus and method embodiments of the invention determine a finite impulse response characteristic of the inverse frequency response of the channel based on a received training signal and the transmitted training signal (610). In the various embodiments, an energy index, a magnitude index, and an offset index are generated and combined with an equalizer length index to select a sequence of initial coefficient values for the equalizer (630, 640, 650).
摘要翻译：一种用于诸如调制解调器（100）的数据通信设备的装置和方法，用于经由经由经由信道接收的发送的训练信号来产生用于均衡器（440）的初始系数值，其中发送的训练信号具有预定特性。本发明的装置和方法实施例基于接收到的训练信号和所发射的训练信号（610）来确定信道的反频率响应的有限脉冲响应特性。在各种实施例中，生成能量索引，幅度索引和偏移索引，并与均衡器长度索引组合以选择均衡器（630,640,650）的初始系数值序列。

7. 发明授权

US5226060A Modem receiver with nonlinear equalization 失效
标题翻译：具有非线性均衡的调制解调器接收机
公开(公告)号：US5226060A
公开(公告)日：1993-07-06
申请号：US818021
申请日：1992-01-08
申请人： Richard L. Goodson , Mickey C. Rushing , Jack L. Hayes
发明人： Richard L. Goodson , Mickey C. Rushing , Jack L. Hayes
IPC分类号： H04B3/14 , H04L25/03
CPC分类号： H04L25/03038 , H04B3/14
摘要： A modem with nonlinear equalization (100) receives a signal (101) that includes linear and nonlinear distortion. The modem includes a multiplier (107) that frequency shifts the signal to form a baseband signal, which is then sampled by an A/D converter (114) to provide a complex receiver input sample, R(n). A first equalizer (117) equalizes R(n) to form a first equalized result (n). A nonlinear generator (129) forms .vertline.R(n).vertline..sup.2 R(n), which is then equalized by a second equalizer (133) to form a second equalized result (n). A summing device (121) combines the first equalized result (n) with the second equalized result (n) to form a composite equalized result (n). The modem includes a data recovery circuit (125) that determines a received signal point (n) based on the composite equalized result (n) and a predetermined constellation.
摘要翻译：具有非线性均衡（100）的调制解调器接收包括线性和非线性失真的信号（101）。调制解调器包括频率移位信号以形成基带信号的乘法器（107），然后由A / D转换器（114）对其进行采样以提供复杂的接收机输入样本R（n）。第一均衡器（117）使R（n）均衡以形成第一均衡结果（n）。非线性发生器（129）形成| R（n）|2R（n），然后由第二均衡器（133）进行均衡以形成第二均衡结果（n）。求和装置（121）将第一均衡结果（n）与第二均衡结果（n）组合以形成复合均衡结果（n）。调制解调器包括数据恢复电路（125），其基于复合均衡结果（n）和预定的星座来确定接收信号点（n）。

8. 发明授权

US06829294B2 DSL auto baud 失效
标题翻译： DSL自动波特率
公开(公告)号：US06829294B2
公开(公告)日：2004-12-07
申请号：US10310338
申请日：2002-12-05
申请人： Ralph F. Sweitzer , Dean E. Rasmussen , Mickey C. Rushing
发明人： Ralph F. Sweitzer , Dean E. Rasmussen , Mickey C. Rushing
IPC分类号： H04B1700
CPC分类号： H04L1/0002 , H04L5/1446 , Y02D50/10
摘要： A DSL communication system including a DSL transmission unit at a central office (DTU-C) and a DSL transmission unit at a remote location (DTU-R) in communication over a communication link. DTU-C and DTU-R are capable of transmitting and receiving packets of data prior to synchronization or training. DTU-C transmits a discovery message to DTU-R and awaits receiving a discovery response message from DTU-R. After receiving the discovery response message, DTU-C transmits a probe message to DTU-R followed by a probe signal. DTU-R measures the line quality while receiving the probe signal. After receiving the probe signal, DTU-R transmits a probe signal to DTU-C, using which signal DTU-C measures the line quality. After transmitting the probe signal, DTU-R transmits a probe response message, including line quality measurements performed by DTU-R. DTU-C and DTU-R may negotiate a first data rate by transmitting data rate messages based on the line quality measurements and/or based on other information that may be exchanged between DTU-C and DTU-R. DTU-C and DTU-R synchronize or train at the first data rate. After synchronization, DTU-C and/or DTU-R measure the line quality at the first data rate. The line quality may be measured based on bit-error-rate, attenuation level and/or signal-to-noise ratio. A second data rate is then selected based on the line quality measurements. DTU-C may then initiate a rate change request, according to which DTU-C and DTU-R may re-synchronize at the second rate. The second rate may be several data rates higher or lower than the first data rate.
摘要翻译：一种DSL通信系统，包括通过通信链路进行通信的中心局（DTU-C）处的DSL传输单元和远程位置（DTU-R）的DSL传输单元。 DTU-C和DTU-R能够在同步或训练之前发送和接收数据包。 DTU-C将发现消息发送到DTU-R，并等待从DTU-R接收发现响应消息。在接收到发现响应消息之后，DTU-C向DTU-R发送探测消息，接着是探测信号。 DTU-R在接收探头信号时测量线路质量。 DTU-R接收到探测信号后，使用哪个信号DTU-C测量线路质量，向DTU-C发送探测信号。发送探测信号后，DTU-R发送探测响应消息，包括由DTU-R执行的线路质量测量。 DTU-C和DTU-R可以通过基于线路质量测量和/或基于可以在DTU-C和DTU-R之间交换的其他信息发送数据速率消息来协商第一数据速率。 DTU-C和DTU-R以第一个数据速率同步或训练。同步后，DTU-C和/或DTU-R以第一个数据速率测量线路质量。可以基于误码率，衰减水平和/或信噪比来测量线路质量。然后基于线路质量测量选择第二数据速率。然后，DTU-C可以发起速率改变请求，根据该请求，DTU-C和DTU-R可以以第二速率重新同步。第二速率可以是高于或低于第一数据速率的几个数据速率。

9. 发明授权

US06535551B1 DSL post-synchronization auto baud 有权
标题翻译： DSL后同步自动波特率
公开(公告)号：US06535551B1
公开(公告)日：2003-03-18
申请号：US09629564
申请日：2000-07-31
申请人： Ralph F. Sweitzer , Dean E. Rasmussen , Mickey C. Rushing
发明人： Ralph F. Sweitzer , Dean E. Rasmussen , Mickey C. Rushing
IPC分类号： H04B1700
CPC分类号： H04L5/1446 , H04L1/0002
摘要： A DSL communication system including a DSL transmission unit at a central office (DTU-C) and a DSL transmission unit at a remote location (DTU-R) in communication over a communication link. DTU-C and DTU-R synchronize or train at a first data rate. After synchronization, DTU-C and/or DTU-R measure the line quality at the first data rate. The line quality may be measured based on bit-error-rate, attenuation level and/or signal-to-noise ratio. A second data rate is then selected based on the line quality measurements. DTU-C may then initiate a rate change request, according to which DTU-C and DTU-R may re-synchronize at the second rate. The second rate may be several data rates higher or lower than the first data rate.
摘要翻译：一种DSL通信系统，包括通过通信链路进行通信的中心局（DTU-C）处的DSL传输单元和远程位置（DTU-R）的DSL传输单元。 DTU-C和DTU-R以第一数据速率同步或训练。同步后，DTU-C和/或DTU-R以第一个数据速率测量线路质量。可以基于误码率，衰减水平和/或信噪比来测量线路质量。然后基于线路质量测量选择第二数据速率。然后，DTU-C可以发起速率改变请求，根据该请求，DTU-C和DTU-R可以以第二速率重新同步。第二速率可以是高于或低于第一数据速率的几个数据速率。

10. 发明授权

US5280473A Modem with echo cancellation 失效
标题翻译：具有回声消除的调制解调器
公开(公告)号：US5280473A
公开(公告)日：1994-01-18
申请号：US897184
申请日：1992-06-11
申请人： Mickey C. Rushing , Steven R. Blackwell
发明人： Mickey C. Rushing , Steven R. Blackwell
IPC分类号： H04B3/23 , H04L5/14
CPC分类号： H04B3/237 , H04L5/14
摘要： A modem receiver includes an echo canceller (122), the echo canceller including a near-end echo canceller (128) and a far-end echo canceller (130). The echo canceller also includes a phase jitter tracker (154) arranged to track and generate a phase jitter component associated with the far-end echo.
摘要翻译：调制解调器接收机包括回波消除器（122），回波消除器包括近端回声消除器（128）和远端回声消除器（130）。回波消除器还包括相位抖动跟踪器（154），其布置成跟踪并产生与远端回波相关联的相位抖动分量。

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