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1. 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。

2. 发明授权

US5809085A Apparatus and method for detecting and discriminating various signal types in the presence of impulse distortions 失效
标题翻译：在存在脉冲失真的情况下检测和识别各种信号类型的装置和方法
公开(公告)号：US5809085A
公开(公告)日：1998-09-15
申请号：US496048
申请日：1995-06-28
申请人： Richard L. Goodson , Mickey C. Rushing , Gary D. Hunt , Lee T. Gusler, Jr.
发明人： Richard L. Goodson , Mickey C. Rushing , Gary D. Hunt , Lee T. Gusler, Jr.
IPC分类号： H03D1/06 , H03D1/02
CPC分类号： H03D1/06
摘要： An apparatus and method are provided for a data communications device, such as a modem (100, 101) or facsimile machine, to detect and discriminate various amplitude modulated signals, such as an ANS signal of the ITU V.25 protocol and an ANSam signal of the ITU V.8 protocol, which may be subject to impulse distortions (FIG. 5B). The apparatus and method embodiments band pass filter (204) an incoming signal at a first frequency, and dynamically limit (208) any impulse distortions of the incoming signal to a limit threshold (211). The limit thresholds may be dynamically determined by rectifying (209) and low pass filtering (210) the band pass filtered signal to determine a low frequency average magnitude level of the incoming signal, with the limit thresholds set as a predetermined variance from this low frequency average magnitude level. The various frequency components of the amplitude modulated signal may then be discriminated by rectifying (215) and band pass filtering (217) at a second frequency, such as the frequency of the amplitude modulating component. Various detectors (205, 206) then determine the type of information present in the incoming signal, such as whether the signal is an ANS signal or an ANSam signal.
摘要翻译：为诸如调制解调器（100,101）或传真机之类的数据通信设备提供了一种用于检测和鉴别各种幅度调制信号（诸如ITU V.25协议的ANS信号）和ANSam信号的装置和方法的ITU V.8协议，可能会受到脉冲失真（图5B）的影响。装置和方法实施例以第一频率对输入信号进行带通滤波器（204），并且将输入信号的任何脉冲失真动态地限制（208）到极限阈值（211）。极限阈值可以通过整流（209）和低通滤波（210）带通滤波信号来动态地确定，以确定输入信号的低频平均幅度电平，其中限制阈值被设置为与该低频率的预定方差平均幅度级别。然后可以通过在诸如振幅调制分量的频率的第二频率进行整流（215）和带通滤波（217）来鉴别幅度调制信号的各种频率分量。各种检测器（205,206）然后确定输入信号中存在的信息的类型，诸如信号是ANS信号还是ANSam信号。

3. 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）。

4. 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。

5. 发明授权

US5844940A Method and apparatus for determining transmit power levels for data transmission and reception 失效
标题翻译：用于确定数据传输和接收的发射功率电平的方法和装置
公开(公告)号：US5844940A
公开(公告)日：1998-12-01
申请号：US496988
申请日：1995-06-30
申请人： Richard L. Goodson , Mickey C. Rushing , Gary D. Hunt
发明人： Richard L. Goodson , Mickey C. Rushing , Gary D. Hunt
IPC分类号： H04B7/005 , H04B1/38
CPC分类号： H04W52/367
摘要： An apparatus and method for a data communications device such as a modem (100, 101) to determine transmit power levels for data transmission and reception, from a received probe signal. The various embodiments utilizing a processor (108) or a digital signal processor (106) receive a probe signal, transmitted at two different power levels, which also typically contains noise and other distortions. The various method and apparatus embodiments then determine average signal levels (501), average noise levels (503), and a set of signal to distortion ratios corresponding to combinations of symbol rates and carrier frequencies. Parameters such as the receive signal power (509), the harmonic content (507), the proportional noise (511), and a signal to distortion ratio threshold (513) are utilized to determine a transmit power level (515).
摘要翻译：一种用于数据通信设备的装置和方法，例如调制解调器（100,101），用于从接收到的探测信号确定数据发送和接收的发射功率电平。利用处理器（108）或数字信号处理器（106）的各种实施例接收在两个不同功率电平（其也通常包含噪声和其它失真）的传输信号。各种方法和装置实施例然后确定对应于符号速率和载波频率的组合的平均信号电平（501），平均噪声电平（503）以及一组信号到失真比。使用诸如接收信号功率（509），谐波含量（507），比例噪声（511）和信号到失真比阈值（513）的参数来确定发射功率电平（515）。

6. 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）。

7. 发明授权

US5625646A Method, device, DSP and modem for efficient echo canceler phase roll tracking 失效
标题翻译：方法，设备，DSP和调制解调器，用于高效回波消除器相位跟踪
公开(公告)号：US5625646A
公开(公告)日：1997-04-29
申请号：US494914
申请日：1995-06-26
申请人： Richard L. Goodson , Mickey C. Rushing
发明人： Richard L. Goodson , Mickey C. Rushing
IPC分类号： H03L7/06 , H04B3/23 , H04B15/00
CPC分类号： H03L7/06 , H04B3/232
摘要： The present invention provides a novel method, device, digital signal processor and modem for efficiently determining and tracking a phase roll of a far end echo by utilizing a novel phase error generator and a novel, efficient replica generator. The efficient replica generator utilizes a uniquely positioned phase rotator to facilitate replication of the far end echo. A unique combination of a Hilbert phase splitter and a conjugate Hilbert phase splitter together with a rectangular to polar converter enable the novel phase error generator to provide a reliable phase error.
摘要翻译：本发明提供了一种新颖的方法，装置，数字信号处理器和调制解调器，用于通过利用新颖的相位误差发生器和新颖的有效的复制发生器来有效地确定和跟踪远端回波的相位。有效的复制发生器利用独特定位的相位旋转器来促进远端回波的复制。希尔伯特分相器和共轭希尔伯特分相器与矩形到极化转换器的独特组合使得新颖的相位误差发生器能够提供可靠的相位误差。

8. 发明授权

US07672367B1 System and method for selecting data rates of initialization signals 有权
标题翻译：选择初始化信号数据速率的系统和方法
公开(公告)号：US07672367B1
公开(公告)日：2010-03-02
申请号：US11202439
申请日：2005-08-12
申请人： Marc Kimpe , Jack G. Atkinson, Jr. , Richard L. Goodson , Arlynn Wilson
发明人： Marc Kimpe , Jack G. Atkinson, Jr. , Richard L. Goodson , Arlynn Wilson
IPC分类号： H04B17/00 , H04L23/00 , H04B1/38
CPC分类号： H04L5/1446 , H04L1/0002
摘要： A system includes a transceiver for communicating over a telecommunication line that is coupled to the transceiver. The transceiver comprises logic configured to measure attenuation of at least one signal transmitted across the telecommunication line. The logic is further configured to automatically select, based on the measured attenuation, a plurality of different data rates for a plurality of initialization signals communicated via the transceiver during an initialization phase that precedes a data phase.
摘要翻译：系统包括用于通过耦合到收发器的电信线路进行通信的收发器。收发器包括被配置为测量通过电信线路传输的至少一个信号的衰减的逻辑。该逻辑还被配置为基于测量的衰减，在数据相位之前的初始化阶段期间，自动地选择通过收发器传送的多个初始化信号的多个不同的数据速率。

9. 发明授权

US06888896B1 Method and apparatus for reducing flux imbalance signal distortion in a data communications system 有权
标题翻译：用于减少数据通信系统中的通量不平衡信号失真的方法和装置
公开(公告)号：US06888896B1
公开(公告)日：2005-05-03
申请号：US09527162
申请日：2000-03-17
申请人： Daniel M. Joffe , Richard L. Goodson , Curtis W. Dodd
发明人： Daniel M. Joffe , Richard L. Goodson , Curtis W. Dodd
IPC分类号： H04B3/00 , H04B3/30
CPC分类号： H04B3/30
摘要： A method and apparatus for reducing signal distortion in a high speed data communications system caused by a flux imbalance in a system coupling transformer. The signal distortion is monitored by a combination echo canceller circuit connected to the equipment side winding of the transformer, thereby generating an error signal. Changes in the error signal are used by a flux controller to provide a flux cancellation signal. The flux cancellation signal is added with the data signal to generate an offsetting flux signal to the transformer.
摘要翻译：一种用于减少由系统耦合变压器中的磁通不平衡引起的高速数据通信系统中的信号失真的方法和装置。信号失真由连接到变压器的设备侧绕组的组合回波消除电路监视，从而产生误差信号。通量控制器使用误差信号的变化来提供磁通消除信号。磁通消除信号加上数据信号，以产生到变压器的偏移磁通信号。

10. 发明授权

US06680978B1 Method and apparatus for nonlinear filtering and controlling the peak-to-average ratio 有权
标题翻译：用于非线性滤波和控制峰均比的方法和装置
公开(公告)号：US06680978B1
公开(公告)日：2004-01-20
申请号：US09260863
申请日：1999-03-01
申请人： Kevin W. Schneider , Richard L. Goodson , Steven R. Blackwell , Fred T. Y. Chu
发明人： Kevin W. Schneider , Richard L. Goodson , Steven R. Blackwell , Fred T. Y. Chu
IPC分类号： H04B1404
CPC分类号： H04B1/62 , H04B2201/70706 , H04L25/497
摘要： A method and apparatus for providing a precoder filter having peak-to-average ratio (PAR) controller that also serves as a high-pass, low-pass, or band-pass filter. The described invention is includes a modulo device connected in series with the PAR controller and a precoder filter connected in a feedback arrangement. The input to the apparatus is a sequence of data symbols and the output is a spectrally shaped precoded signal having a controlled peak-to-average ratio.
摘要翻译：一种用于提供也具有高通，低通或带通滤波器的峰值平均比（PAR）控制器的预编码器滤波器的方法和装置。所描述的发明包括与PAR控制器串联连接的模装置和以反馈装置连接的预编码器滤波器。该装置的输入是一系列数据符号，并且该输出是具有受控峰均比的频谱形状的预编码信号。

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