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1. 发明授权

US6134273A Bit loading and rate adaptation on DMT DSL data transmission 失效
标题翻译： DMT DSL数据传输的位加载和速率调整
公开(公告)号：US6134273A
公开(公告)日：2000-10-17
申请号：US996731
申请日：1997-12-23
申请人： Song Wu , Yaqi Cheng , Dennis G. Mannering
发明人： Song Wu , Yaqi Cheng , Dennis G. Mannering
IPC分类号： H04L27/26 , H04K1/10 , H04L27/28
CPC分类号： H04L27/2608
摘要： A method to estimate the bit loading on each tone of a DMT digital subscriber loop system is disclosed. A generic bit-mapping table is given for different sizes of constellations to save memory space.
摘要翻译：公开了一种用于估计DMT数字用户环路系统的每个音调上的比特加载的方法。给出了不同大小星座的通用位映射表，以节省内存空间。

2. 发明申请

US20060120443A1 Multi-client ADSL modem 审中-公开
标题翻译：多客户端ADSL调制解调器
公开(公告)号：US20060120443A1
公开(公告)日：2006-06-08
申请号：US11339285
申请日：2006-01-25
申请人： Yaqi Cheng , Yaser Ibrahim , Song Wu
发明人： Yaqi Cheng , Yaser Ibrahim , Song Wu
IPC分类号： H04L5/16
CPC分类号： H04M11/062 , H04L12/403 , H04L12/4625
摘要： A multi-client ADSL modem network (10) that can be configured for a home or office network when multiple ADSL client modems (18) are installed in different communication terminals (22). One ADSL modem (14) at a central office (12) coordinates the remote multi-client modems (18) for communication over a single twisted pair loop carrier phone line (16), allowing the connected modems (18) to communicate not only with the CO modem (14), but also with each other by sharing frames, tones, or by code division techniques on upstream channels. The CO modem (14) operates as a network hub and/or arbitrator, and facilitates one ADSL modem to become the master modem and maintain the superframe. The present invention provides home network ADSL service without extra wiring or equipment, thus providing a low cost approach for home networking of ADSL service.
摘要翻译：当多个ADSL客户调制解调器（18）安装在不同的通信终端（22）中时，可以为家庭或办公室网络配置的多客户端ADSL调制解调器网络（10）。在中心局（12）处的一个ADSL调制解调器（14）协调远程多客户端调制解调器（18），用于通过单个双绞线环路载波电话线路（16）进行通信，从而允许所连接的调制解调器（18）不仅与 CO调制解调器（14），但是也可以通过在上行信道上共享帧，音调或者通过代码分割技术彼此相连。 CO调制解调器（14）作为网络集线器和/或仲裁器操作，并且便于一个ADSL调制解调器成为主调制解调器并维护超帧。本发明提供家庭网络ADSL业务，无需额外的布线或设备，从而为ADSL业务的家庭网络提供了低成本的方法。

3. 发明授权

US06549512B2 MDSL DMT architecture 失效
标题翻译： MDSL DMT架构
公开(公告)号：US06549512B2
公开(公告)日：2003-04-15
申请号：US09105134
申请日：1998-06-25
申请人： Song Wu , Donald P. Shaver , Yaqi Cheng
发明人： Song Wu , Donald P. Shaver , Yaqi Cheng
IPC分类号： H04J1100
CPC分类号： H04L27/2608
摘要： A DMT device having an analog front end for receiving an analog signal, a converter for converting the analog signal to a digital signal, a FFT for converting the digital signal from the time domain to the frequency domain and feeding the digital signal to a frequency domain equalizer having variable coefficients for flattening the converted digital signal. The frequency domain equalizer includes a gain corrector coupled to the FFT to compensate the channel frequency rolloff and make each tone approximately the same amplitude before phase rotation and a phase rotator portion responsive to the output of the gain corrector to track small channel variation. Also included is circuitry for updating the coefficients of the frequency domain equalizer, preferably in the form of a slicer for controlling the frequency domain equalizer by feeding back an error signal thereto. The error signal is preferably fed back to the phase rotator portion of the frequency domain equalizer.
摘要翻译：具有用于接收模拟信号的模拟前端的DMT装置，用于将模拟信号转换为数字信号的转换器，用于将数字信号从时域转换为频域的FFT，并将数字信号馈送到频域均衡器具有用于使转换的数字信号变平的可变系数。频域均衡器包括耦合到FFT的增益校正器，以补偿信道频率滚降，并使相位旋转之前的每个音调大致相同的振幅，并且响应于增益校正器的输出来跟踪小信道变化的相位旋转部分。还包括用于更新频域均衡器的系数的电路，优选地以限幅器的形式，用于通过向其反馈误差信号来控制频域均衡器。误差信号优选地反馈到频域均衡器的相位旋转器部分。

4. 发明授权

US07031380B1 Multi-client ADSL modem 有权
标题翻译：多客户端ADSL调制解调器
公开(公告)号：US07031380B1
公开(公告)日：2006-04-18
申请号：US09651976
申请日：2000-08-31
申请人： Yaqi Cheng , Yaser M. Ibrahim , Song Wu
发明人： Yaqi Cheng , Yaser M. Ibrahim , Song Wu
IPC分类号： H04L1/38 , H04L12/56
CPC分类号： H04M11/062 , H04L12/2856 , H04L12/289
摘要： A multi-client ADSL modem network (10) that can be configured for a home or office network when multiple ADSL client modems (18) are installed in different communication terminals (22). One ADSL modem (14) at a central office (12) coordinates the remote multi-client modems (18) for communication over a single twisted pair loop carrier phone line (16), allowing the connected modems (18) to communicate not only with the CO modem (14), but also with each other by sharing frames, tones, or by code division techniques on upstream channels. The CO modem (14) operates as a network hub and/or arbitrator, and facilitates one ADSL modem to become the master modem and maintain a superframe. The present invention provides home network ADSL service without extra wiring or equipment, thus providing a low cost approach for home networking of ADSL service.
摘要翻译：当多个ADSL客户调制解调器（18）安装在不同的通信终端（22）中时，可以为家庭或办公室网络配置的多客户端ADSL调制解调器网络（10）。在中心局（12）处的一个ADSL调制解调器（14）协调远程多客户端调制解调器（18），用于通过单个双绞线环路载波电话线路（16）进行通信，从而允许所连接的调制解调器（18）不仅与 CO调制解调器（14），但是也可以通过在上行信道上共享帧，音调或者通过代码分割技术彼此相连。 CO调制解调器（14）作为网络集线器和/或仲裁器操作，并且便于一个ADSL调制解调器成为主调制解调器并维护超帧。本发明提供家庭网络ADSL业务，无需额外的布线或设备，从而为ADSL业务的家庭网络提供了低成本的方法。

5. 发明授权

US07130335B1 Multi-line ADSL modem 有权
标题翻译：多线ADSL调制解调器
公开(公告)号：US07130335B1
公开(公告)日：2006-10-31
申请号：US09671326
申请日：2000-09-26
申请人： Yaqi Cheng , Adam M. Chellali
发明人： Yaqi Cheng , Adam M. Chellali
IPC分类号： H04B1/38
CPC分类号： H04M11/062
摘要： A multi-line ADSL modem (12) and network (10) whereby the multi-line ADSL modem (12) has connections to several ADSL modems (14) at a central office (CO) (16) through a master loop (18), shared loops (20, 22), and/or broadcast loops (84). The master loop (18) provides the basic connection between the multi-line ADSL modem (12) and the CO modem (14) at the central office (16) while maintaining regular telephone service. The shared loops allow the multi-line ADSL modem to share the transmission capacity with other modems. The multi-line ADSL modem is able to receive broadcast data from the central office where several loops are configured as a broadcast loop for downstream transmission only, but which can also be configured for upstream communication transmission only or in combination with downstream transmission to provide bi-directional broadband communications.
摘要翻译：多线ADSL调制解调器（12）和网络（10），由此多线路ADSL调制解调器（12）通过主回路（18）具有在中心局（CO）（16）处的多个ADSL调制解调器（14）的连接，，共享环路（20,22）和/或广播环路（84）。主环路（18）提供了在中心局（16）处的多线ADSL调制解调器（12）和CO调制解调器（14）之间的基本连接，同时保持常规的电话服务。共享环路允许多线ADSL调制解调器与其他调制解调器共享传输容量。多线ADSL调制解调器能够从中心局接收广播数据，其中若干个环路被配置为仅用于下游传输的广播环路，但是也可以仅配置用于上游通信传输或与下游传输相结合，以提供bi 双向宽带通信。

6. 发明授权

US06263470B1 Efficient look-up table methods for Reed-Solomon decoding 有权
标题翻译： Reed-Solomon解码的高效查询表方法
公开(公告)号：US06263470B1
公开(公告)日：2001-07-17
申请号：US09200348
申请日：1998-11-25
申请人： Ching-Yu Hung , Yaqi Cheng , Tod D. Wolf
发明人： Ching-Yu Hung , Yaqi Cheng , Tod D. Wolf
IPC分类号： H03M1300
CPC分类号： H03M13/1515
摘要： A programmable logic device (130) as may be used in a communication system device such as a digital subscriber line modem (408) to perform Reed-Solomon decoding upon a received frame of digital values is disclosed. The programmable logic device (130) may be implemented as a DSP (130) or a general purpose microprocessor, for example. According to one disclosed embodiment of the invention, a group of look-up tables (60) are arranged, each look-up table (60) associated with one of the possible power values of a finite field, number up to twice the number of correctable errors. The contents of each entry (SYN) of the look-up tables (60) correspond to the finite field (e.g., Galois field) multiplication of a primitive element raised to an index power with a character of the finite field alphabet. Galois field multiplications (62) in syndrome accumulation may now be performed with a single table look-up operation. According to other disclosed embodiments of the invention, look-up tables (60, 160) are similarly arranged to contain the contents of finite field (e.g., Galois field) multiplication products for use in a Chien search procedure. In a single-thread version of the disclosed Chien search procedure, a subset of the same look-up tables (60) as used in syndrome accumulation may be utilized.
摘要翻译：公开了可以在诸如数字用户线路调制解调器（408）的通信系统设备中使用的可编程逻辑设备（130），以在接收的数字值帧上执行里德 - 所罗门解码。例如，可编程逻辑器件（130）可以被实现为DSP（130）或通用微处理器。根据本发明的一个公开的实施例，布置了一组查找表（60），每个查找表（60）与有限域的可能功率值之一相关联，数量高达两倍可纠正的错误。查找表（60）的每个条目（SYN）的内容对应于提高到索引权力的原始元素与有限字段字母的字符的有限域（例如Galois域）相乘。综合征累积中的伽罗瓦域乘法（62）现在可以通过单个表查找操作执行。根据本发明的其它公开的实施例，查找表（60,160）被类似地布置成包含用于Chien搜索过程的有限域（例如Galois域）乘法乘积的内容。在所公开的Chien搜索过程的单线程版本中，可以利用在综合征积累中使用的相同查找表（60）的子集。

7. 发明授权

US06456650B1 Splitterless modem using harmonics reduction 有权
标题翻译：无分频调制解调器使用谐波减少
公开(公告)号：US06456650B1
公开(公告)日：2002-09-24
申请号：US09244607
申请日：1999-02-04
申请人： Yaqi Cheng , Adam M. Chellali , Michael O. Polley
发明人： Yaqi Cheng , Adam M. Chellali , Michael O. Polley
IPC分类号： H04B138
CPC分类号： H04M11/062
摘要： In a splitterless Digital Subscriber Line (DSL) modem 30, a receiver architecture (100) that permits monitoring of harmonics within the upstream channel of a DSL connection. The receiver (100) can detect the harmonics by monitoring the harmonics in some empty tones or specified tones. A threshold can be set to differ the normal noise power and harmonics power in those empty or specified tones. When a POTS device (10) coupled to same wire line pair (20) as the DSL modem (30) goes off-hook, the DSL modem (30) can switch from the normal state to an off-hook state in which the harmonics are reduced to minimum by transmitting only the upper sub-band tones of the upstream transmission channel at reduced power levels.
摘要翻译：在无分离器数字用户线路（DSL）调制解调器30中，允许监视DSL连接的上行信道内的谐波的接收机体系结构（100）。接收器（100）可以通过监视一些空调或指定音调中的谐波来检测谐波。可以设置阈值以使空闲或指定音调中的正常噪声功率和谐波功率不同。当耦合到与DSL调制解调器（30）的同一有线线路（20）的POTS设备（10）摘机时，DSL调制解调器（30）可以从正常状态切换到摘机状态，其中谐波通过在降低的功率电平仅发送上行传输信道的上级子带音调而减小到最小。

8. 发明授权

US06269154B1 Splitterless modem with integrated off-hook detector 有权
标题翻译：无分体调制解调器，集成了摘机检测器
公开(公告)号：US06269154B1
公开(公告)日：2001-07-31
申请号：US09244604
申请日：1999-02-04
申请人： Adam M. Chellali , Yaqi Cheng , Walter Y. Chen , Michael O. Polley
发明人： Adam M. Chellali , Yaqi Cheng , Walter Y. Chen , Michael O. Polley
IPC分类号： H04M1100
CPC分类号： H04M11/062
摘要： A splitterless DSL modem (200) with an integrated off-hook detector (260) prevents data loss and/or disconnections as a voiceband device (154) coupled to the same transmission line (150) transition between steady states. The splitterless DSL modem (200) include a DSP (260), an interface (250) to a twisted pair wire line (150), signal converters (220, 222), and various filters (230, 240). The off-hook detector circuit (260) can be coupled to the interface (250) on the analog side of the DSL modem (200) or on the digital side of the signal converters (220, 222).
摘要翻译：具有集成摘机检测器（260）的无分离器DSL调制解调器（200）防止数据丢失和/或断开作为耦合到在稳定状态之间的相同传输线（150）转换的语音频带设备（154）。无分路器DSL调制解调器（200）包括DSP（260），到双绞线（150）的接口（250），信号转换器（220,222）和各种滤波器（230,240）。摘机检测器电路（260）可以耦合到DSL调制解调器（200）的模拟侧上或信号转换器（220,222）的数字侧上的接口（250）。

9. 发明授权

US06898210B1 System and method for providing a local area network utilizing remote transceivers 有权
标题翻译：使用远程收发器提供局域网的系统和方法
公开(公告)号：US06898210B1
公开(公告)日：2005-05-24
申请号：US09584650
申请日：2000-05-31
申请人： Yaqi Cheng , Richard G. C. Williams , John R. Rosenlof , A. Joseph Mueller
发明人： Yaqi Cheng , Richard G. C. Williams , John R. Rosenlof , A. Joseph Mueller
IPC分类号： H04L12/28 , H04M11/06 , H04J1/00
CPC分类号： H04L12/2838 , H04L12/2803 , H04M11/062
摘要： A system and method for providing a local area network utilizing discrete multitone transceivers includes at least two discrete multitone transceivers each of which may be capable of communicating with the central office and with other discrete multitone transceivers in communication with the local area network. The local area network utilizes a set of carriers coordinated between the first discrete multitone transceiver and the second discrete multitone transceiver providing a communication link between the first discrete multitone transceiver and the second discrete multitone transceiver.
摘要翻译：用于使用离散多音收发器提供局域网的系统和方法包括至少两个离散多音收发器，每个离散多音收发器可能能够与中心局以及与局域网通信的其他离散多音收发器进行通信。局域网利用在第一离散多音收发器和第二离散多音收发器之间协调的一组载波，提供第一离散多音收发器和第二离散多音收发器之间的通信链路。

10. 发明授权

US06674810B1 Method and apparatus for reducing peak-to-average power ratio in a discrete multi-tone signal 失效
标题翻译：用于降低离散多音调信号中的峰均功率比的方法和装置
公开(公告)号：US06674810B1
公开(公告)日：2004-01-06
申请号：US09321523
申请日：1999-05-27
申请人： Yaqi Cheng
发明人： Yaqi Cheng
IPC分类号： H04K102
CPC分类号： H04L27/2618 , H04B3/23
摘要： A method and apparatus for reducing peak-to-average power ratio in a discrete multi-tone signal. A shaping signal is generated and added to a discrete multi-tone signal to be transmitted. The shaping signal includes tones that are outside a transmission band assigned to the discrete multi-tone signal to be transmitted. One or more filters may be used to suppress the shaping function after digital-to-analog conversion has been performed. Alternatively, echo cancellation may be performed to cancel feedback tones associated with the transmit signal and shaping signal that may occur on the receive path of a discrete multi-tone transceiver. The peak-to-average power ratio reduction method and apparatus may be used in an ADSL modem in one embodiment.
摘要翻译：一种用于降低离散多音调信号中的峰均功率比的方法和装置。产生整形信号并将其加到待发送的离散多音调信号上。整形信号包括分配给待传输的离散多音调信号的传输频带之外的音调。可以使用一个或多个滤波器来抑制在进行数模转换之后的整形功能。或者，可以执行回波消除以取消与可能在离散多音调收发器的接收路径上发生的发送信号和整形信号相关联的反馈音调。在一个实施例中，可以在ADSL调制解调器中使用峰均功率比降低方法和装置。

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