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1.发明授权Transceiver system with analog and digital signal echo cancellation having adaptably adjustable filter characteristics 有权具有模拟和数字信号回波消除的收发器系统具有可调节的滤波器特性公开(公告)号：US08447000B2
公开(公告)日：2013-05-21
申请号：US12319985
申请日：2009-01-12
CPC分类号： H04L25/03057 , H04L25/03254
摘要： A receiver that easily receives signals from transmission channels having long cable lengths is presented. The receiver includes an analog pre-filter that removes distortions and intersymbol interference from a predetermined transmission channel. The analog pre-filter is coupled with a digital receiver that provides digital equalization. The combination of analog equalization with digital equalization allows for simplified digital equalization while retaining the versatility of digital signal processing.
摘要翻译： 提出了一种容易从具有长电缆长度的传输通道接收信号的接收机。 接收机包括一个模拟预滤波器，用于消除来自预定传输信道的失真和符号间干扰。 模拟预滤波器与提供数字均衡的数字接收机耦合。 模拟均衡与数字均衡的组合允许简化的数字均衡，同时保持数字信号处理的通用性。
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2.发明授权Transceiver system with analog and digital signal echo cancellation having adaptably adjustable filter characteristics 有权具有模拟和数字信号回波消除的收发器系统具有可调节的滤波器特性公开(公告)号：US07756228B1
公开(公告)日：2010-07-13
申请号：US11542532
申请日：2006-10-02
CPC分类号： H04L25/03057 , H04L25/03254
摘要： Analog echo-cancelling circuitry (611 and 627) operates on an input analog signal that includes an echo of an output signal, or on an analog signal generated from the input signal, to produce an analog signal with reduced echo. An analog-to-digital converter (210) converts the echo-reduced analog signal, or an analog signal generated therefrom, into a digital signal. Digital echo-cancelling circuitry (615 and 621) operates on the digital signal, or on a digital signal generated therefrom, to produce a digital signal with further reduced echo. An output decoder (605) decodes the echo-reduced digital signal, or a digital signal generated therefrom, into a stream of symbols. The echo-filtering characteristics of both echo-cancelling circuitries are typically adaptively adjusted during generation of the symbol stream. The analog echo-filtering characteristics may be adapted in response to information provided by operating on the echo-reduced digital signal or on a digital signal generated therefrom.
摘要翻译： 模拟回波消除电路（611和627）对包括输出信号的回波或输入信号产生的模拟信号的输入模拟信号进行操作，以产生具有降低回波的模拟信号。 模数转换器（210）将回波减小的模拟信号或由其产生的模拟信号转换为数字信号。 数字回波消除电路（615和621）对数字信号或由其产生的数字信号进行操作以产生具有进一步降低的回波的数字信号。 输出解码器（605）将回波减小的数字信号或由其产生的数字信号解码成符号流。 两个回波消除电路的回波滤波特性通常在符号流生成期间进行自适应调整。 模拟回波滤波特性可以响应于通过对回波减小的数字信号或由其产生的数字信号进行操作而提供的信息而被适配。
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3.发明授权System and method for adapting an analog echo canceller in a transceiver front end 有权在收发器前端适配模拟回波消除器的系统和方法公开(公告)号：US06980644B1
公开(公告)日：2005-12-27
申请号：US09570078
申请日：2000-05-12
CPC分类号： H04M9/082
摘要： There is disclosed an echo canceller circuit for use in a full duplex transceiver of the type comprising a line driver capable of sending analog transmit signals through a cable and comprising a line receiver capable of receiving analog receive signals from the cable. An echo canceller impedance model circuit is coupled to an output of the line driver and is coupled to an input of the line receiver. The echo canceller impedance model circuit generates an echo canceller current that is equal in magnitude and opposite in phase to a current that represents signal echoes that are present in the analog receive signals. The echo canceller impedance model circuit has a variable impedance for generating the echo canceller current. The variable impedance has at least one variable resistor and at least one variable capacitor. The values of resistance and capacitance in the echo canceller impedance model circuit are varied in response to control signals from a echo canceller control circuit to compensate for and cancel signal echoes.
摘要翻译： 公开了一种用于全双工收发器的回波消除器电路，其包括能够通过电缆发送模拟发射信号的线路驱动器并且包括能够从电缆接收模拟接收信号的线路接收器的线路接收机。 回波消除器阻抗模型电路耦合到线路驱动器的输出端并耦合到线路接收机的输入。 回波消除器阻抗模型电路产生质量相等并且与表示模拟接收信号中存在的信号回波的电流相位相反的回波消除器电流。 回波消除器阻抗模型电路具有用于产生回波消除器电流的可变阻抗。 可变阻抗具有至少一个可变电阻器和至少一个可变电容器。 回波消除器阻抗模型电路中的电阻和电容值响应于来自回波消除器控制电路的控制信号而变化，以补偿和消除信号回波。
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4.发明授权Near-end, far-end and echo cancellers in a multi-channel transceiver system 失效多通道收发器系统中的近端，远端和回声消除器公开(公告)号：US07613234B2
公开(公告)日：2009-11-03
申请号：US12080815
申请日：2008-04-04
摘要： A transceiver according to the present invention receives data from a plurality of frequency separated transmission channels from a complementary transmitter and includes an interference filter for correcting for interference from transmitters other than the complementary transmitter. The interference filter, for example, can correct for near-end cross-talk and echo interference filtering and/or far-end crosstalk interference filtering is presented. A transceiver can include a transmitter portion and a receiver portion with one or more receivers coupled to receives signals in the plurality of frequency separated transmission channels. A baseband transmitter can be combined with one or more transmitters that transmit data into one of the frequency separated transmission bands. Any combination of modulation systems can be utilized (e.g. PAM for the baseband and QAM for the frequency separated bands). In some embodiments, one baseband PAM transmitter is combined with one or more frequency separated QAM transmitters.
摘要翻译： 根据本发明的收发器从互补发射机接收来自多个频率分离的传输信道的数据，并且包括用于校正来自除了互补发射机之外的发射机的干扰的干扰滤波器。 例如，干扰滤波器可以校正近端串扰和回波干扰滤波和/或远端串扰干扰滤波。 收发机可以包括发射机部分和接收机部分，其中一个或多个接收机被耦合以接收多个频率分离的传输信道中的信号。 基带发射机可以与将数据发射到频率分离的传输频带之一的一个或多个发射机组合。 可以利用调制系统的任何组合（例如用于基带的PAM和频率分离频带的QAM）。 在一些实施例中，一个基带PAM发射机与一个或多个频率分离的QAM发射机组合。
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5.发明授权公开(公告)号：US07526053B1
公开(公告)日：2009-04-28
申请号：US11517435
申请日：2006-09-08
申请人： Peter J. Sallaway , Sreen Raghavan
发明人： Peter J. Sallaway , Sreen Raghavan
CPC分类号： H04L25/03267 , H04B3/23 , H04B3/32 , H04L25/03197 , H04L25/4919 , H04L2025/03363 , H04L2025/0349
摘要： A sequence detector (1400-w) operating generally according to the Viterbi algorithm contains a branch metric generator (1402-w), comparison circuitry (1403-w), and symbol generation circuitry (1404, 1405, and 1406) for converting digital values of a detector input signal into a sequence of predefined symbols chosen from an alphabet of predefined symbols. The comparison circuitry provides soft output signals for correcting errors. The soft output signals include best and second-best state metrics (pk,w(i) and p2k,w(i)) and corresponding best and second-best comparison results (Dk,w(i) and D2k,w(i)). The symbol generation circuitry typically utilizes the best comparison results to generate a preliminary sequence of the predefined symbols, checks for error in the preliminary sequence, and utilizes the second-best comparison results in correcting any such error in the preliminary sequence so as to convert it into a final sequence of the predefined symbols.
摘要翻译： 通常根据维特比算法运行的序列检测器（1400-w）包含用于转换数字值的分支度量发生器（1402-w），比较电路（1403-w）和符号生成电路（1404,1405和1406） 检测器输入信号转换成从预定符号的字母表中选择的预定符号序列。 比较电路提供用于校正错误的软输出信号。 软输出信号包括最佳和最佳状态度量（pk，w（i）和p2k，w（i））和相应的最佳和第二最佳比较结果（Dk，w（i）和D2k，w（i） ）。 符号生成电路通常利用最佳比较结果来产生预定义符号的初步序列，检查初步序列中的错误，并利用第二好的比较结果校正初步序列中的任何这样的误差，以便将其转换 进入预定义符号的最后序列。
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6.发明申请Near-end, far-end and echo cancellers in a multi-channel transceiver system 失效多通道收发器系统中的近端，远端和回声消除器公开(公告)号：US20080285634A1
公开(公告)日：2008-11-20
申请号：US12080815
申请日：2008-04-04
IPC分类号： H04B1/38
摘要： A transceiver according to the present invention receives data from a plurality of frequency separated transmission channels from a complementary transmitter and includes an interference filter for correcting for interference from transmitters other than the complementary transmitter. The interference filter, for example, can correct for near-end cross-talk and echo interference filtering and/or far-end crosstalk interference filtering is presented. A transceiver can include a transmitter portion and a receiver portion with one or more receivers coupled to receives signals in the plurality of frequency separated transmission channels. A baseband transmitter can be combined with one or more transmitters that transmit data into one of the frequency separated transmission bands. Any combination of modulation systems can be utilized (e.g. PAM for the baseband and QAM for the frequency separated bands). In some embodiments, one baseband PAM transmitter is combined with one or more frequency separated QAM transmitters.
摘要翻译： 根据本发明的收发器从互补发射机接收来自多个频率分离的传输信道的数据，并且包括用于校正来自除了互补发射机之外的发射机的干扰的干扰滤波器。 例如，干扰滤波器可以校正近端串扰和回波干扰滤波和/或远端串扰干扰滤波。 收发机可以包括发射机部分和接收机部分，其中一个或多个接收机被耦合以接收多个频率分离的传输信道中的信号。 基带发射机可以与将数据发射到频率分离的传输频带之一的一个或多个发射机组合。 可以利用调制系统的任何组合（例如用于基带的PAM和用于频率分离频带的QAM）。 在一些实施例中，一个基带PAM发射机与一个或多个频率分离的QAM发射机组合。
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公开(公告)号：US07403752B2
公开(公告)日：2008-07-22
申请号：US10310255
申请日：2002-12-04
IPC分类号： H04B17/02
CPC分类号： H04L27/2601
摘要： A transceiver system according to the present invention transmits data utilizing the baseband and one or more frequency separated transmission bands. A baseband transmitter is combined with one or more transmitters that transmit data into one of the frequency separated transmission bands. A baseband receiver is combined with one or more receivers that receive data from the frequency separated transmission bands. Any combination of modulation systems can be utilized (e.g. PAM for the baseband and QAM for the frequency separated bands). A transceiver circuit or chip according to the present invention includes a transmitter and a receiver and communicates with a corresponding transceiver chip. In some embodiments, one baseband PAM transmitter is combined with one frequency separated QAM transmitter.
摘要翻译： 根据本发明的收发机系统使用基带和一个或多个频率分离的发送频带来发送数据。 基带发射机与将数据发射到频率分离的传输频带之一的一个或多个发射机组合。 基带接收机与从频率分离的传输频带接收数据的一个或多个接收机组合。 可以利用调制系统的任何组合（例如用于基带的PAM和用于频率分离频带的QAM）。 根据本发明的收发器电路或芯片包括发射机和接收机，并与对应的收发机芯片进行通信。 在一些实施例中，一个基带PAM发射机与一个频率分离的QAM发射机组合。
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8.发明授权High-speed multi-channel communications transceiver with inter-channel interference filter 有权具有通道间干扰滤波器的高速多通道通讯收发器公开(公告)号：US07236757B2
公开(公告)日：2007-06-26
申请号：US10071771
申请日：2002-02-06
CPC分类号： H04L27/2601
摘要： A communication system is disclosed that allows high data-rate transmission of data between components. N-bit parallel data is transmitted in K-frequency separated channels on the transmission medium so as to fully take advantage of the overall bandwidth of the transmission medium. Additionally, a cross-channel interference filter in a receiver section corrects for cross-channel interference in the communication system. As a result, a very high data-rate transmission can be accomplished with low data-bit transmission on individual channels. A transmitter system and a receiver system are described for the communication system.
摘要翻译： 公开了允许组件之间数据高数据速率传输的通信系统。 在传输介质上以K个频率分离的信道发送N位并行数据，以充分利用传输介质的总带宽。 此外，接收机部分中的交叉信道干扰滤波器校正通信系统中的跨信道干扰。 因此，可以在单个通道上进行低数据位传输来实现非常高的数据速率传输。 为通信系统描述了发射机系统和接收机系统。
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公开(公告)号：US07590168B2
公开(公告)日：2009-09-15
申请号：US09965242
申请日：2001-09-26
CPC分类号： H04L27/2601
摘要： A communication system is disclosed that allows high data-rate transmission of data between components. N-bit parallel data is transmitted in K-frequency separated channels on the transmission medium so as to fully take advantage of the overall bandwidth of the transmission medium. As a result, a very high data-rate transmission can be accomplished with low data-bit transmission on individual channels. A transmitter system and a receiver system are described for the communication system.
摘要翻译： 公开了允许组件之间数据高数据速率传输的通信系统。 在传输介质上以K个频率分离的信道发送N位并行数据，以充分利用传输介质的总带宽。 因此，可以在单个通道上进行低数据位传输来实现非常高的数据速率传输。 为通信系统描述了发射机系统和接收机系统。
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10.发明授权System and method for adapting an analog echo canceller in a transceiver front end 有权在收发器前端适配模拟回波消除器的系统和方法公开(公告)号：US07333603B1
公开(公告)日：2008-02-19
申请号：US11320520
申请日：2005-12-27
CPC分类号： H04M9/082
摘要： There is disclosed an echo canceller circuit for use in a full duplex transceiver of the type comprising a line driver capable of sending analog transmit signals through a cable and comprising a line receiver capable of receiving analog receive signals from the cable. An echo canceller impedance model circuit is coupled to an output of the line driver and is coupled to an input of the line receiver. The echo canceller impedance model circuit generates an echo canceller current that is equal in magnitude and opposite in phase to a current that represents signal echoes that are present in the analog receive signals. The echo canceller impedance model circuit has a variable impedance for generating the echo canceller current. The variable impedance has at least one variable resistor and at least one variable capacitor. The values of resistance and capacitance in the echo canceller impedance model circuit are varied in response to control signals from a echo canceller control circuit to compensate for and cancel signal echoes.
摘要翻译： 公开了一种用于全双工收发器的回波消除器电路，其包括能够通过电缆发送模拟发射信号的线路驱动器并且包括能够从电缆接收模拟接收信号的线路接收器的线路接收机。 回波消除器阻抗模型电路耦合到线路驱动器的输出端并耦合到线路接收机的输入。 回波消除器阻抗模型电路产生质量相等并且与表示模拟接收信号中存在的信号回波的电流相位相反的回波消除器电流。 回波消除器阻抗模型电路具有用于产生回波消除器电流的可变阻抗。 可变阻抗具有至少一个可变电阻器和至少一个可变电容器。 回波消除器阻抗模型电路中的电阻和电容值响应于来自回波消除器控制电路的控制信号而变化，以补偿和消除信号回波。
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