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1. 发明授权

US6141377A Method and apparatus for voice frequency noise reduction in splitterless ADSL 失效
标题翻译：无分路器ADSL中语音噪声降低的方法和装置
公开(公告)号：US6141377A
公开(公告)日：2000-10-31
申请号：US124866
申请日：1998-07-30
申请人： Craig A. Sharper , Kyung-Yeop Hong
发明人： Craig A. Sharper , Kyung-Yeop Hong
IPC分类号： H04M11/06 , H04B1/38
CPC分类号： H04M11/062
摘要： An ADSL modem provides compensation for a nonlinear telephone impedance by predistorting transmit signals such that the voltage across the nonlinear impedance is correct independent of the impedance. Correcting the voltage across the nonlinear impedance reduces noise in the telephone due to intermodulation products generated in the voice band. The modem comprises a transmitter that includes (a) a signal source providing a source data signal and (b) a predistortion circuit for predistorting the source data signal to provide a modem transmit signal for coupling to a transmission loop having a nonlinear impedance coupled thereto. The modem device further includes a receiver for receiving a modem receive signal from the transmission loop. The source data signal comprises source digital words, each source digital word corresponding to a particular voltage level. The predistortion circuit includes a memory for mapping the source digital words to predistortion digital words, each predistortion digital word corresponding to a particular desired voltage level. The transmitter further includes a digital-to-analog converter for converting the predistortion digital words into the modem transmit signal. A feedback circuit coupled to the loop measures the distortion of the modem transmit signal to provide a feedback signal to the predistortion circuit that is indicative of the measured distortion. The predistortion circuit adjusts the amount of predistortion in response to the feedback signal.
摘要翻译： ADSL调制解调器通过预失真发送信号来提供对非线性电话阻抗的补偿，使得非线性阻抗两端的电压与阻抗无关。校正非线性阻抗的电压可以降低由于语音频段产生的互调产物造成的电话噪声。调制解调器包括发射机，其包括（a）提供源数据信号的信号源和（b）预失真电路，用于预失真源数据信号以提供用于耦合到具有耦合到其的非线性阻抗的传输环路的调制解调器发射信号。调制解调器装置还包括用于从传输环路接收调制解调器接收信号的接收机。源数据信号包括源数字字，每个源数字字对应于特定电压电平。预失真电路包括用于将源数字字映射到预失真数字字的存储器，每个预失真数字字对应于特定的期望电压电平。发射机还包括用于将预失真数字字转换成调制解调器发送信号的数模转换器。耦合到环路的反馈电路测量调制解调器发射信号的失真，以向预失真电路提供指示所测量的失真的反馈信号。预失真电路根据反馈信号调整预失真量。

2. 发明授权

US5553059A Network interface unit remote test pattern generation 失效
标题翻译：网络接口单元远程测试模式生成
公开(公告)号：US5553059A
公开(公告)日：1996-09-03
申请号：US440297
申请日：1995-05-26
申请人： Earl A. Emerson , Henry J. Gonzalez , Kyung-Yeop Hong
发明人： Earl A. Emerson , Henry J. Gonzalez , Kyung-Yeop Hong
IPC分类号： G06F11/00 , G06F11/14 , G06F11/22 , G06F13/38 , H04B17/40 , H04L1/24 , H04L12/26 , H04J3/14
CPC分类号： H04L1/247 , G06F11/1402 , G06F11/22 , G06F13/38 , H04B17/401 , H04L1/241 , H04L1/243 , H04L1/244 , H04L12/2697 , H04L43/50
摘要： A system for isolating the direction of communication errors in the local loop of a digital data network is described. A Network Interface Unit (NIU) located at the customer premises typically has a loopback feature, allowing for Bit Error Rate Tests (BERT) to be performed on the local loop from a remote test system located on the data network. The NIU loopback test isolates transmission problems at the customer premises from problems on the local loop. The present invention adds test pattern generation capability to the NIU, allowing the remote test system to determine whether the transmission problem on the local loop is in the network to customer premises direction or in the customer premises to network direction.
摘要翻译：描述了用于隔离数字数据网络的本地环路中的通信错误的方向的系统。位于客户驻地的网络接口单元（NIU）通常具有环回功能，允许在位于数据网络上的远程测试系统的本地环路上执行误码率测试（BERT）。 NIU环回测试将客户端的传输问题与本地环路上的问题隔离开来。本发明向NIU添加测试模式生成能力，允许远程测试系统确定本地环路上的传输问题是否在网络中到客户驻地方向或者在客户驻地到网络方向。

3. 发明授权

US5434866A Digital communication system with intelligent channel units 失效
标题翻译：具有智能通道单元的数字通信系统
公开(公告)号：US5434866A
公开(公告)日：1995-07-18
申请号：US118936
申请日：1993-09-09
申请人： Earl A. Emerson , Mahesh P. Desai , Henry J. Gonzalez , Kyung-Yeop Hong , Martin L. Swim
发明人： Earl A. Emerson , Mahesh P. Desai , Henry J. Gonzalez , Kyung-Yeop Hong , Martin L. Swim
IPC分类号： H04J3/14 , H04L1/08 , H04Q3/00 , H04Q11/04 , H04J3/00 , H04L1/16
CPC分类号： H04Q3/00 , H04J3/14 , H04L1/08 , H04Q11/04
摘要： In a time division multiplex digital communication system, access devices are capable of generating and detecting data sequences that are normally suppressed by end user equipment for establishing in-band communications between the access device and selected intelligent channel units (ICU's). In-band communication is initiated by transmitting a sequence comprising a plurality of first bytes for preventing inadvertent initiation of maintenance operations for digital devices in a particular time slot, followed by a plurality of second bytes in said time slot. In-band communications is established when the selected ICU receives a sequence comprising a plurality of said first bytes, a plurality of bytes which identify the select device and a plurality of said second bytes. Once established, in-band communications can then be used to accomplish automated provisioning, performance reporting, status reporting, alarm reporting as well as other important functions.
摘要翻译：在时分复用数字通信系统中，接入设备能够生成和检测由终端用户设备正常抑制的用于在接入设备和所选择的智能信道单元（ICU）之间建立带内通信的数据序列。通过发送包括多个第一字节的序列来启动带内通信，用于防止在特定时隙中数字设备的意外启动，随后在所述时隙中的多个第二字节。当选择的ICU接收到包括多个所述第一字节的序列，识别选择设备的多个字节和多个所述第二字节时，建立带内通信。一旦建立起来，可以使用带内通信来完成自动配置，性能报告，状态报告，报警报告以及其他重要功能。

4. 发明授权

US5473329A Performance monitoring for loops 失效
公开(公告)号：US5473329A
公开(公告)日：1995-12-05
申请号：US378788
申请日：1995-01-26
申请人： Dev V. Gupta , Kyung-Yeop Hong
发明人： Dev V. Gupta , Kyung-Yeop Hong
IPC分类号： H04L1/24 , H03M5/12
CPC分类号： H04L1/247
摘要： Loop Performance Monitoring (LPM) for DDS loops is described. Even though DDS loops have Intentional Bipolar Violations (BPVs), a Loop Coding Violations (LCVs) detection strategy based on further processing of BPVs is described. By monitoring LCVs a local loop terminating device can determine Bit Error Rate (BER).A system is described by which an Office Channel Unit (OCU) can process LCV information to determine signal quality of the signal over the incoming local loop. If the signal quality falls below a certain threshold, the OCU can cut the loop off from the DDS circuit and send control codes into the network.A system is also described where a Network Interface Unit (NIU) with the LPM system communicates incoming LCV information to the OCU using low speed signalling over the simplex path between the transmit and receive pairs. The OCU monitors incoming LCVs as well, and thus has the information necessary to determine bi-directional BER performance.

5. 再颁专利

USRE36862E Performance monitoring for loops 失效
标题翻译：环路性能监控
公开(公告)号：USRE36862E
公开(公告)日：2000-09-12
申请号：US712487
申请日：1996-09-11
申请人： Dev V. Gupta , Kyung-Yeop Hong
发明人： Dev V. Gupta , Kyung-Yeop Hong
IPC分类号： H04L1/24 , H03M5/12
CPC分类号： H04L1/247
摘要： Loop Performance Monitoring (LPM) for DDS loops is described. Even though DDS loops have Intentional Bipolar Violations (BPVs), a Loop Coding Violations (LCVs) detection strategy based on further processing of BPVs is described. By monitoring LCVs a local loop terminating device can determine Bit Error Rate (BER).A system is described by which an Office Channel Unit (OCU) can process LCV information to determine signal quality of the signal over the incoming local loop. If the signal quality falls below a certain threshold, the OCU can cut the loop off from the DDS circuit and send control codes into the network.A system is also described where a Network Interface Unit (NIU) with the LPM system communicates incoming LCV information to the OCU using low speed signalling over the simplex path between the transmit and receive pairs. The OCU monitors incoming LCVs as well, and thus has the information necessary to determine bi-directional BER performance.
摘要翻译：描述了DDS循环的循环性能监控（LPM）。尽管DDS循环具有故意双极违例（BPV），但是描述了基于BPV进一步处理的循环编码违规（LCV）检测策略。通过监视LCV，本地环路终端设备可以确定误码率（BER）。描述了一种系统，通过该系统，Office信道单元（OCU）可以处理LCV信息以确定通过传入本地环路的信号的信号质量。如果信号质量低于某个阈值，OCU可以从DDS电路中切断环路，并将控制码发送到网络中。还描述了一种系统，其中具有LPM系统的网络接口单元（NIU）通过在发送和接收对之间的单工路径上的低速信令将输入的LCV信息传送到OCU。 OCU也监视输入的LCV，因此具有确定双向BER性能所需的信息。

6. 发明授权

US5726986A Digital communication system with intelligent channel units 失效
标题翻译：具有智能通道单元的数字通信系统
公开(公告)号：US5726986A
公开(公告)日：1998-03-10
申请号：US448700
申请日：1995-05-24
申请人： Earl A. Emerson , Mahesh P. Desai , Henry J. Gonzalez , Kyung-Yeop Hong , Martin L. Swim
发明人： Earl A. Emerson , Mahesh P. Desai , Henry J. Gonzalez , Kyung-Yeop Hong , Martin L. Swim
IPC分类号： H04J3/14 , H04L1/08 , H04Q3/00 , H04Q11/04 , H04J3/12
CPC分类号： H04Q3/00 , H04J3/14 , H04L1/08 , H04Q11/04
摘要： In a time division multiplex digital communication system, access devices are capable of generating and detecting data sequences that are normally suppressed by end user equipment for establishing in-band communications between the access device and selected intelligent channel units (ICU's ). An ICU initiates in-band communication with the access device by transmitting a service request sequence to the access device. The access device transmits a wake-up sequence to the ICU to establish in-band communication. Once established, in-band communications can then be used to accomplish automated provisioning, performance reporting, status reporting, alarm reporting as well as other important functions.
摘要翻译：在时分复用数字通信系统中，接入设备能够生成和检测由终端用户设备正常抑制的用于在接入设备和所选择的智能信道单元（ICU）之间建立带内通信的数据序列。 ICU通过向接入设备发送服务请求序列来发起与接入设备的带内通信。接入设备向ICU发送唤醒序列以建立带内通信。一旦建立起来，可以使用带内通信来实现自动配置，性能报告，状态报告，报警报告以及其他重要功能。

7. 发明授权

US5394145A Performance monitoring for loops 失效
公开(公告)号：US5394145A
公开(公告)日：1995-02-28
申请号：US029876
申请日：1993-03-11
申请人： Dev V. Gupta , Kyung-Yeop Hong
发明人： Dev V. Gupta , Kyung-Yeop Hong
IPC分类号： H04L1/24 , H03M5/12
CPC分类号： H04L1/247
摘要： Loop Performance Monitoring (LPM) for DDS loops is described. Even though DDS loops have Intentional Bipolar Violations (BPVs), a Loop Coding Violations (LCVs) detection strategy based on further processing of BPVs is described. By monitoring LCVs a local loop terminating device can determine Bit Error Rate (BER).A system is described by which an Office Channel Unit (OCU) can process LCV information to determine signal quality of the signal over the incoming local loop. If the signal quality falls below a certain threshold, the OCU can cut the loop off from the DDS circuit and send control codes into the network.A system is also described where a Network Interface Unit (NIU) with the LPM system communicates incoming LCV information to the OCU using low speed signalling over the simplex path between the transmit and receive pairs. The OCU monitors incoming LCVs as well, and thus has the information necessary to determine bi-directional BER performance.

8. 发明授权

US5058129A Two-wire digital transmission loop 失效
标题翻译：双线数字传输环路
公开(公告)号：US5058129A
公开(公告)日：1991-10-15
申请号：US419839
申请日：1989-10-11
申请人： Dev V. Gupta , Kyung-Yeop Hong
发明人： Dev V. Gupta , Kyung-Yeop Hong
IPC分类号： H04L25/03 , H04L25/49
CPC分类号： H04L25/4906 , H04L25/03343
摘要： A quadrature coder for a two-wire digital loop communication system is described in which data is sampled and quadrature encoded by being divided into two bit streams, one of which comprises every other bit in the original bit stream and the other one comprises the remaining bits. One of the divided bit streams is delayed by 90.degree. from the other. The delayed and undelayed bit streams are then recombined and transmitted over a two-wire loop.
摘要翻译：描述了一种用于二线数字环通信系统的正交编码器，其中数据被采样并通过被划分为两个比特流进行正交编码，其中一个比特流包括原始比特流中的每隔一个比特，另一个包括剩余比特。其中一个分流比特流从另一个延迟90度。延迟和未延迟的比特流然后被重新组合并通过二线环路传输。

9. 发明授权

US06731627B1 Virtual loop carrier system 有权
标题翻译：虚拟环路载波系统
公开(公告)号：US06731627B1
公开(公告)日：2004-05-04
申请号：US09441587
申请日：1999-11-17
申请人： Dev V. Gupta , Subra Dravida , Vikram Saksena , Paiman Nodoushani , Denis Claveloux , Sriram Narayan , Kyung-Yeop Hong , Anthony Monteiro , Wei Ye , David S. Yoon
发明人： Dev V. Gupta , Subra Dravida , Vikram Saksena , Paiman Nodoushani , Denis Claveloux , Sriram Narayan , Kyung-Yeop Hong , Anthony Monteiro , Wei Ye , David S. Yoon
IPC分类号： H04L1266
CPC分类号： H04L12/66
摘要： A loop carrier system includes a home local area network having plural telephone modules and a hub coupled to in-home telephone wiring. The telephone modules and the hub communicate voice signals over the in-home wiring in a dedicated frequency band above baseband POTS. The hub converts between voice signals and voice packets and is connected to a network access device for transferring the voice packets from the home local area network to a telecommunications network which routes the voice packets to a gateway. The gateway converts between the voice packets and a circuit format compatible with a local digital voice switch.
摘要翻译：环路载波系统包括具有多个电话模块的家庭局域网和耦合到家庭内电话线路的集线器。电话模块和集线器在基带POTS之上的专用频带内通过家庭内线路传送语音信号。集线器在语音信号和语音分组之间进行转换，并连接到网络接入设备，用于将语音分组从本地局域网传送到将语音分组路由到网关的电信网络。网关在语音数据包和与本地数字语音交换机兼容的电路格式之间进行转换。

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