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1. 发明授权

US5909463A Single-chip software configurable transceiver for asymmetric communication system 失效
标题翻译：用于非对称通信系统的单芯片软件可配置收发器
公开(公告)号：US5909463A
公开(公告)日：1999-06-01
申请号：US741634
申请日：1996-11-04
申请人： Terence L. Johnson , Peter R. Molnar , Howard E. Levin , Jeffrey P. Gleason , Robin Wiprud , Sujit Sudhaman , Jody Everett , Michael R. May , Carlos A. Greaves , Mathew A. Rybicki , Matthew A. Pendleton , John M. Porter
发明人： Terence L. Johnson , Peter R. Molnar , Howard E. Levin , Jeffrey P. Gleason , Robin Wiprud , Sujit Sudhaman , Jody Everett , Michael R. May , Carlos A. Greaves , Mathew A. Rybicki , Matthew A. Pendleton , John M. Porter
IPC分类号： H04L5/14 , H04L27/00 , H04L27/26 , H04B1/38 , H04B1/56 , H04L5/16
CPC分类号： H04L5/143 , H04L27/0002 , H04L27/2626 , H04L27/2647 , H04Q2213/13034 , H04Q2213/1305 , H04Q2213/13103 , H04Q2213/1319 , H04Q2213/13199 , H04Q2213/1332
摘要： A transceiver (5) for an asymmetric communication system such as asymmetric digital subscriber line (ADSL) includes a configuration register (71) defining operation at either a central office (CO) or a remote terminal (RT). The configuration register (71) includes a control bit (72) for selecting either CO or RT mode. The transceiver (5) includes a signal processing module (70) configured according to the state of the control bit (72). For example, a digital interface (70) converts transmit data into transmit symbols and converts received symbols into receive data. The digital interface (70) uses a large memory (158) as a buffer in the transmit path and a small memory (160) as a buffer in the receive path in CO mode. In RT mode, the digital interface (70) uses the small memory (160) in the transmit path and the large memory (158) in the receive path. The selective configuration allows a single integrated circuit to be used in both CO and RT equipment.
摘要翻译：用于诸如非对称数字用户线（ADSL）的非对称通信系统的收发器（5）包括定义在中心局（CO）或远程终端（RT）处的操作的配置寄存器（71）。配置寄存器（71）包括用于选择CO或RT模式的控制位（72）。收发器（5）包括根据控制位（72）的状态配置的信号处理模块（70）。例如，数字接口（70）将发送数据转换为发送符号并将接收到的符号转换为接收数据。数字接口（70）使用大容量存储器（158）作为发送路径中的缓冲器，并且在CO模式中使用作为接收路径中的缓冲器的小存储器（160）。在RT模式中，数字接口（70）使用发送路径中的小存储器（160）和接收路径中的大存储器（158）。选择性配置允许在CO和RT设备中使用单个集成电路。

2. 发明授权

US5742527A Flexible asymmetrical digital subscriber line (ADSL) receiver, central office using same, and method therefor 失效
标题翻译：灵活的非对称数字用户线路（ADSL）接收机，中心局使用方法及其方法
公开(公告)号：US5742527A
公开(公告)日：1998-04-21
申请号：US616818
申请日：1996-03-15
申请人： Mathew A. Rybicki , Michael R. May , Matthew A. Pendleton , Terence L. Johnson , Peter R. Molnar
发明人： Mathew A. Rybicki , Michael R. May , Matthew A. Pendleton , Terence L. Johnson , Peter R. Molnar
IPC分类号： H04L25/02 , H04J11/00 , H04L25/03 , H04L27/26 , H04M11/06 , H04Q11/02 , H04Q11/04 , H04L5/20
CPC分类号： H04L27/2649 , H04Q11/0435 , H04Q2213/13034 , H04Q2213/13107 , H04Q2213/1313 , H04Q2213/1319 , H04Q2213/13199 , H04Q2213/13209 , H04Q2213/13376 , H04Q2213/13396
摘要： An ADSL receiver (200) receives an upstream modified ADSL signal and an ISDN signal from a remote terminal (32) on a twisted-pair copper wire (18). An ADSL transmitter (100) of the remote terminal (32) transmits the ADSL signal in a frequency range above an ISDN frequency range so that the ADSL signal does not overlap the frequency range of the ISDN signal. In one embodiment, the ADSL receiver (200) includes a band pass filter (201), an analog-to-digital converter (203), a decimator (205), a fast Fourier transform (210), and a digital signal processor (212). The decimator (205) converts the ADSL signal back to base band, thus allowing an ADSL signal source to simultaneously utilize the telephone line with an ISDN signal source, without significantly reducing ADSL throughput.
摘要翻译： ADSL接收机（200）从双绞铜线（18）上的远程终端（32）接收上游修改的ADSL信号和ISDN信号。远程终端（32）的ADSL发射机（100）在ISDN频率范围之外的频率范围内发送ADSL信号，使得ADSL信号不与ISDN信号的频率范围重叠。在一个实施例中，ADSL接收器（200）包括带通滤波器（201），模数转换器（203），抽取器（205），快速傅里叶变换（210）和数字信号处理器 212）。抽取器（205）将ADSL信号转换回基带，从而允许ADSL信号源同时利用电话线与ISDN信号源，而不显着降低ADSL吞吐量。

3. 发明授权

US5781728A Flexible asymmetrical digital subscriber line ADSL transmitter, remote terminal using same, and method therefor 失效
标题翻译：灵活的非对称数字用户线ADSL发射机，远程终端使用相同，及其方法
公开(公告)号：US5781728A
公开(公告)日：1998-07-14
申请号：US616819
申请日：1996-03-15
申请人： Mathew A. Rybicki , Michael R. May , Matthew A. Pendleton , Terence L. Johnson , Peter R. Molnar
发明人： Mathew A. Rybicki , Michael R. May , Matthew A. Pendleton , Terence L. Johnson , Peter R. Molnar
IPC分类号： H04J11/00 , H04L5/06 , H04L27/00 , H04M3/00 , H04M11/00 , H04Q11/04 , H04J1/02
CPC分类号： H04Q11/0435 , H04L27/0002 , H04L5/06 , H04Q2213/13034 , H04Q2213/13107 , H04Q2213/1313 , H04Q2213/1319 , H04Q2213/13199 , H04Q2213/13209 , H04Q2213/13376 , H04Q2213/13396
摘要： A flexible asymmetrical digital subscriber line (ADSL) transmitter is able to operate simultaneously with integrated services digital network (ISDN) terminal equipment (TE) using a common telephone line (18). The ADSL transmitter changes the frequency content of a frequency-encoded ADSL signal (104) so that its frequency content does not overlap the frequency content of the ISDN TE signal. A corresponding ADSL receiver located within a central office (CO) adapts to the changed frequency content, allowing the ADSL signal to be transmitted over the telephone line without substantial loss of signal integrity. In one embodiment, an ADSL transmitter (100) converts ADSL symbols making up the frequency-encoded ADSL signal (104) into a corresponding time domain signal. The transmitter (100) then interpolates the time domain signal and high pass filters the interpolated signal. This high pass filtered signal is then converted to analog form, bandpass filtered, and driven onto the telephone line (18).
摘要翻译：灵活的非对称数字用户线（ADSL）发射机能够使用公用电话线（18）与综合业务数字网（ISDN）终端设备（TE）同时工作。 ADSL发射机改变频率编码ADSL信号（104）的频率内容，使其频率内容不与ISDN TE信号的频率内容重叠。位于中心局（CO）内的对应的ADSL接收机适应于改变的频率内容，允许ADSL信号通过电话线传输，而不会显着损失信号完整性。在一个实施例中，ADSL发射机（100）将构成频率编码的ADSL信号（104）的ADSL符号转换成对应的时域信号。然后，发射机（100）内插时域信号，并对内插信号进行高通滤波。然后将该高通滤波信号转换为模拟形式，经过滤波，并被驱动到电话线路（18）上。

4. 发明授权

US06275522B1 Method for allocating data and power in a discrete, multi-tone communication system 失效
标题翻译：用于在离散的多音通信系统中分配数据和功率的方法
公开(公告)号：US06275522B1
公开(公告)日：2001-08-14
申请号：US09007390
申请日：1998-01-14
申请人： Terence Johnson , Michael R. May , Matthew A. Pendleton , Howard E. Levin
发明人： Terence Johnson , Michael R. May , Matthew A. Pendleton , Howard E. Levin
IPC分类号： H04B346
CPC分类号： H04L27/2608
摘要： In the present invention, an ADSL system (10) identifies good bin as a bin capable of successfully transmitting data to a destination. A bad bin is identified as a carrier that is not capable of successfully transmitting data to the destination. A marginal bin is identified as a carrier that may be capable of transmitting data to the destination. The power to a bad bin is reduced and allocated to the marginal or good bin(s) to allow an increased bit rate. In another embodiment, the power to marginal bin is reduced and allocated to the good bin(s).
摘要翻译：在本发明中，ADSL系统（10）识别出能够成功地将数据发送到目的地的bin的好的bin。一个坏的垃圾箱被识别为不能成功传送数据到目的地的载体。边缘垃圾箱被识别为可以向目的地发送数据的载体。减少对坏垃圾箱的电力并将其分配给边缘或好的仓，以允许增加的比特率。在另一个实施例中，边缘垃圾箱的功率被减少并分配给好的垃圾箱。

5. 发明授权

US06259746B1 Method for allocating data and power in a discrete multi-tone communication system 失效
标题翻译：在离散多音通信系统中分配数据和功率的方法
公开(公告)号：US06259746B1
公开(公告)日：2001-07-10
申请号：US09007218
申请日：1998-01-14
申请人： Howard E. Levin , Michael R. May , Matthew A. Pendleton
发明人： Howard E. Levin , Michael R. May , Matthew A. Pendleton
IPC分类号： H04L2704
CPC分类号： H04L27/2608
摘要： In the present invention, carriers associated with a discrete multi-tone (DMT) communications system (10) are sorted according to bit allocation capacity. The number of bits needed to attain a specified bit rate are then allocated beginning with the carrier having the greatest bit allocation capacity and proceeding toward the carrier having the least bit allocation capacity until all bits to are allocated. Once allocated, the power to any unused bins is reduced. Different subsets of the carriers between line cards can be specified in order to reduce crosstalk between adjacent lines.
摘要翻译：在本发明中，根据比特分配容量对与离散多音（DMT）通信系统（10）相关联的载波进行分类。然后从具有最大位分配容量的载波开始分配达到指定比特率所需的比特数，并且朝向具有最小比特分配容量的载波进行分配，直到所有比特被分配为止。一旦分配，任何未使用的箱的功率就会降低。可以指定线路卡之间的载波的不同子集，以减少相邻线路之间的串扰。

6. 发明授权

US5835536A Method and apparatus for reducing peak-to-average requirements in multi-tone communication circuits 失效
标题翻译：用于减少多音通信电路中的峰值与平均要求的方法和装置
公开(公告)号：US5835536A
公开(公告)日：1998-11-10
申请号：US383026
申请日：1995-02-02
申请人： Michael R. May , Terence L. Johnson , Matthew A. Pendleton
发明人： Michael R. May , Terence L. Johnson , Matthew A. Pendleton
IPC分类号： H04L27/26 , H04L27/34 , H04K1/10
CPC分类号： H04L27/3411 , H04L27/2614 , H04L27/2618
摘要： A symbol generator (804) generates a time-domain discrete multi-tone symbol (810). A magnitude comparator (812) compares the magnitude of the time-domain discrete multi-tone symbol (810) with a magnitude threshold. When the magnitude of the time-domain discrete multi-tone symbol (810) compares unfavorably to the magnitude threshold, a magnitude adjusting symbol (816) is added to the time-domain discrete multi-tone symbol (810) such that the magnitude of the time-domain discrete multi-tone symbol (810) is reduced, thereby reducing the peak-to-average requirements (PAR).
摘要翻译：符号生成器（804）生成时域离散多色调符号（810）。幅度比较器（812）将时域离散多音调符号（810）的幅度与幅度阈值进行比较。当时域离散多音调符号（810）的大小与幅度阈值不利地比较时，幅度调整符号（816）被加到时域离散多音调符号（810），使得降低了时域离散多音调符号（810），从而降低了峰值平均要求（PAR）。

7. 发明授权

US07106715B1 System for providing data to multiple devices and method thereof 有权
标题翻译：用于向多个设备提供数据的系统及其方法
公开(公告)号：US07106715B1
公开(公告)日：2006-09-12
申请号：US09990896
申请日：2001-11-16
申请人： James Robert Kelton , Michael David Cave , James Ward Girardeau, Jr. , Michael R. May , Paul Morris Astrachan , Anselmo Pilla , James Doyle , Shawn Saleem , Mathew A. Rybicki
发明人： James Robert Kelton , Michael David Cave , James Ward Girardeau, Jr. , Michael R. May , Paul Morris Astrachan , Anselmo Pilla , James Doyle , Shawn Saleem , Mathew A. Rybicki
IPC分类号： H04Q7/24 , H04Q7/20 , H04L12/26
CPC分类号： H04L41/0803 , H04L41/0896 , H04W28/18 , H04W52/241 , H04W52/28
摘要： A system is provided for transmitting data to a plurality of devices. A data source receives data from a video broadcasting source, such as a digital television provides, through a data cable. The data source identifies devices to receive particular sets of data, such as particular programs, from the data cable. The data source identifies particular settings for transmitting to particular devices. The data source adjusts a transmission power to a first device to efficiently provide data reliably to the first device. The data source can assign more or less power for transmitting data to the first device. The data source provides data to the source device using a first data channel. The data source provides data to a second device using a second data channel. The data source receives acknowledgements and control information from the first device and the second device using the second data channel.
摘要翻译：提供了一种用于将数据发送到多个设备的系统。数据源通过数据电缆从诸如数字电视的视频广播源接收数据。数据源识别从数据电缆接收特定数据集合（例如特定程序）的设备。数据源标识用于发送到特定设备的特定设置。数据源调整到第一设备的传输功率，以有效地向第一设备提供数据。数据源可以分配更多或更少的功率以将数据发送到第一设备。数据源使用第一数据通道向源设备提供数据。数据源使用第二数据信道向第二设备提供数据。数据源使用第二数据信道从第一设备和第二设备接收确认和控制信息。

8. 发明授权

US07961759B2 Method and apparatus for synchronized channel transmission 有权
标题翻译：用于同步信道传输的方法和装置
公开(公告)号：US07961759B2
公开(公告)日：2011-06-14
申请号：US10376806
申请日：2003-02-28
申请人： Michael R. May , James Ward Girardeau, Jr. , Paul M. Astrachan , Mathew A. Rybicki
发明人： Michael R. May , James Ward Girardeau, Jr. , Paul M. Astrachan , Mathew A. Rybicki
IPC分类号： H04J3/06
CPC分类号： H04L7/041 , H04L27/2607 , H04L27/2662 , H04L27/2678
摘要： A method and apparatus for synchronized channel transmission are disclosed. One embodiment of the method comprises: generating a first data stream and a second data stream; packetizing the first data stream to produce a first plurality of data packets; packetizing the second data stream to produce a second plurality of data packets; baseband processing the first plurality of data packets to produce a first plurality of symbols for each of the first plurality of data packets; baseband processing the second plurality of data packets to produce a second plurality of symbols for each of the second plurality of data packets; converting the first plurality of symbols into a first radio frequency signal; converting the second plurality of symbols into a second radio frequency signal; and synchronizing at least one of: generating the first and the second data streams, packetizing the first and second data streams, baseband processing the first and second plurality of data packets, and converting the first and second plurality of symbols.
摘要翻译：公开了一种用于同步信道传输的方法和装置。该方法的一个实施例包括：产生第一数据流和第二数据流; 打包第一数据流以产生第一多个数据分组; 打包第二数据流以产生第二多个数据分组; 基带处理所述第一多个数据分组以产生所述第一多个数据分组中的每一个的第一多个符号; 基带处理所述第二多个数据分组以产生所述第二多个数据分组中的每一个的第二多个符号; 将所述第一多个符号转换为第一射频信号; 将所述第二多个符号转换为第二射频信号; 以及同步以下各项中的至少一个：产生所述第一和第二数据流，对所述第一和第二数据流进行分组，对所述第一和第二多个数据分组进行基带处理，以及转换所述第一和第二多个符号。

9. 发明授权

US5880687A Cascaded integrator-comb interpolation filter 失效
标题翻译：级联积分梳内插滤波器
公开(公告)号：US5880687A
公开(公告)日：1999-03-09
申请号：US806271
申请日：1997-02-25
申请人： Michael R. May , Carlos A. Greaves
发明人： Michael R. May , Carlos A. Greaves
IPC分类号： H03H17/06 , H03M7/32 , H04L27/00 , H03M3/00
CPC分类号： H04L27/0002 , H03H17/0671
摘要： A cascaded integrator-comb (CIC) interpolation filter is included within a digital-to-analog converter (138) and includes two up-samplers (150, 164). The two up-samplers (150, 164) also include a sample-and-hold function. The first up-sampler (150) up-samples an output of a differentiator (140). The second up-sampler (164) up-samples an output of an integrator (152) This reduces the area and power requirements of the CIC interpolation filter, while providing approximately the same filtering performance in the pass band and transition band. The total over-sample ratio of the CIC interpolation filter is equal to the first up-sampling ratio multiplied by the second up-sampling ratio. The stop band requirements of the CIC interpolation filter determines the relative sizes of the first and second up-sampling ratios.
摘要翻译：级联积分梳（CIC）插值滤波器包括在数模转换器（138）内，并且包括两个上采样器（150,164）。两个上采样器（150,164）还包括采样保持功能。第一上采样器（150）对微分器（140）的输出进行上采样。第二个上采样器（164）对积分器（152）的输出进行上采样。这降低了CIC内插滤波器的面积和功率需求，同时在通带和过渡频带中提供了大致相同的滤波性能。 CIC内插滤波器的总超采样比等于第一个上采样比乘以第二上采样比。 CIC插值滤波器的阻带要求决定了第一和第二上采样比的相对尺寸。

10. 发明授权

US5825826A Method and apparatus for frequency domain ripple compensation for a communications transmitter 失效
标题翻译：用于通信发射机的频域纹波补偿的方法和装置
公开(公告)号：US5825826A
公开(公告)日：1998-10-20
申请号：US724097
申请日：1996-09-30
申请人： Michael R. May , Carlos A. Greaves
发明人： Michael R. May , Carlos A. Greaves
IPC分类号： H03G5/00 , H04L25/03 , H04L27/00 , H04L27/26 , H04L27/04 , H04L27/12 , H04L27/20
CPC分类号： H04L25/03343 , H03G5/005 , H04L27/0002 , H04L27/2626 , H04L2025/03414
摘要： A data stream to be transmitted is received by a digital interface (52) and converted into a frequency encoded data. A gains block (54) receives the frequency encoded data and a gain adjustment signal, and produces a gain adjusted data to compensate for undesirable system level passband gain variation. The gain adjusted data is converted to a time domain data. The time domain data is processed by a high-pass and a droop correction filter (58, 59) to produce a filtered data. The filtered data is provided through an analog front-end (60) in order to provide a filtered analog data.
摘要翻译：要发送的数据流由数字接口（52）接收并转换成频率编码数据。增益块（54）接收频率编码数据和增益调整信号，并产生增益调整数据以补偿不期望的系统级通带增益变化。增益调整后的数据被转换为时域数据。时域数据由高通和下垂校正滤波器（58,59）处理以产生滤波数据。滤波后的数据通过模拟前端（60）提供，以便提供经滤波的模拟数据。

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