公开(公告)号：US07957487B1

公开(公告)日：2011-06-07

申请号：US12581451

申请日：2009-10-19

申请人： King Chun Tsai

发明人： King Chun Tsai

IPC分类号： H04L25/03

CPC分类号： H04L25/03828 ,  H04L27/364

摘要： Apparatus, systems, and methods implementing techniques for reducing spurious components are described. According to one aspect, a wideband polyphase filter filters an input signal that has an associated first frequency. The wideband polyphase filter has poles corresponding to a first filter frequency and a second filter frequency, where the two filter frequencies are different. According to another aspect, a mixer mixes the filtered signal with a local-oscillator signal at a second frequency to produce an upconverted signal, where the second frequency is substantially an integer multiple of the first frequency.

摘要翻译： 描述了实现减少杂散分量的技术的装置，系统和方法。 根据一个方面，宽带多相滤波器对具有相关联的第一频率的输入信号进行滤波。 宽带多相滤波器具有对应于第一滤波器频率和第二滤波器频率的极点，其中两个滤波器频率不同。 根据另一方面，混频器将经滤波的信号与本地振荡器信号以第二频率混频以产生上变频信号，其中第二频率基本上是第一频率的整数倍。

公开(公告)号：US20110075650A1

公开(公告)日：2011-03-31

申请号：US12567364

申请日：2009-09-25

申请人： Yuan Zhu ,  Qinghua Li

发明人： Yuan Zhu ,  Qinghua Li

IPC分类号： H04B7/208 ,  H04L27/28

CPC分类号： H04L25/0246 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0478 ,  H04B7/0482 ,  H04B7/0639 ,  H04B7/065 ,  H04L25/03343 ,  H04L25/03828 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03808

摘要： Techniques for periodically resetting the polar cap for a differential codebook precoding scheme for wireless communications are described. An apparatus may comprise a fixed device for a mobile broadband communications system utilizing an orthogonal frequency-division multiple access technique, the fixed device having a precoding module operative to generate a precoding matrix using a received first codeword of a first base codebook, subsequently reconstruct the precoding matrix using a received polar-cap codeword of a polar-cap codebook, and periodically reset the precoding matrix to clear accumulated error at the fixed device using a received second codeword of a second base codebook. Other embodiments are described and claimed.

摘要翻译： 描述了用于定期复位用于无线通信的差分码本预编码方案的极帽的技术。 一种装置可以包括一种利用正交频分多址技术的移动宽带通信系统的固定装置，该固定装置具有一个预编码模块，用于使用第一基本码本的接收到的第一码字来生成预编码矩阵， 预编码矩阵，并使用第二基本码本的接收到的第二码字周期性地复位预编码矩阵以清除固定设备处的累积误差。 描述和要求保护其他实施例。

公开(公告)号：US07839919B2

公开(公告)日：2010-11-23

申请号：US11706861

申请日：2007-02-13

申请人： Reinhard Stolle ,  Stefan Uhlemann

发明人： Reinhard Stolle ,  Stefan Uhlemann

IPC分类号： H04B1/38 ,  H04L5/16

CPC分类号： H04B3/32 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0082 ,  H04L5/1438 ,  H04L25/03343 ,  H04L25/03828 ,  H04M11/062

摘要： A UPBO is performed based on an attenuation of a first VDSL-cable connecting a first VDSL-CPE and a first VDSL-CO, and also based on an attenuation or electrical length of cable pieces between said first VDSL-CO and a further distant second VDSL-CO. Further, an extended DPBO for the first VDSL-CO is described not only regarding ADSL-cables originating from an ADSL-CO but also VDSL-cables from the further distant second VDSL-CO.

摘要翻译： 基于连接第一VDSL-CPE和第一VDSL-CO的第一VDSL电缆的衰减，并且还基于所述第一VDSL-CO和更远的第二VDSL-CO之间的电缆片的衰减或电长度来执行UPBO VDSL-CO。 此外，不仅描述了来自ADSL-CO的ADSL电缆，还描述了来自更远的第二VDSL-CO的VDSL电缆的用于第一VDSL-CO的扩展DPBO。

公开(公告)号：US07796685B2

公开(公告)日：2010-09-14

申请号：US11513089

申请日：2006-08-31

申请人： Tai-Lai Tung

发明人： Tai-Lai Tung

IPC分类号： H04B1/38

CPC分类号： H04L27/2602 ,  H04L25/03828 ,  H04L27/2626

摘要： Systems and method for minimum power leakage windowing for VDSL using least squares technique are provided. A coefficient vector is defined for the first N samples. The window is then defined in terms of this coefficient vector. The leakage power of the Kth tone is defined in terms of the window. A least squares minimization is performed on the leakage power to determine the optimal value of x. The window is implemented using this value of x, thereby reducing the power leakage in the out-of-band and RFI band regions in the frequency domain.

摘要翻译： 提供了使用最小二乘技术的VDSL最小功率泄漏窗口的系统和方法。 为前N个样本定义系数向量。 然后根据该系数向量来定义该窗口。 第K个音的泄漏功率是根据窗口来定义的。 对泄漏功率进行最小二乘法最小化以确定x的最优值。 该窗口使用该值x来实现，从而减少了频域中的带外和RFI频带区域的功率泄漏。

公开(公告)号：US20100104055A1

公开(公告)日：2010-04-29

申请号：US12607426

申请日：2009-10-28

申请人： Seung-Il JEONG ,  Byung-Ki KIM

发明人： Seung-Il JEONG ,  Byung-Ki KIM

IPC分类号： H04L7/00

CPC分类号： H04J3/0685 ,  H03H17/0294 ,  H03H17/0657 ,  H03H17/0664 ,  H04L25/03828

摘要： An apparatus and method for digital up converting in a mobile communication system are provided. The apparatus includes a Selectable Input Logic (SIL), a Scalable Clock Distribution Logic (SCDL), a filter logic, and a mixer logic. The SIL performs decimation at a decimation rate. The SCDL controls a clock frequency. The filter logic performs channel filtering for the decimated signal, and performs interpolation at an interpolation rate variable. The mixer logic up-converts the signal provided from the filter logic.

摘要翻译： 提供了一种用于在移动通信系统中进行数字上转换的装置和方法。 该装置包括可选输入逻辑（SIL），可伸缩时钟分配逻辑（SCDL），滤波器逻辑和混频器逻辑。 SIL以抽取率进行抽取。 SCDL控制时钟频率。 滤波器逻辑对抽取信号进行信道滤波，并以内插速率变量进行插值。 混频器逻辑对从滤波器逻辑提供的信号进行升压转换。

公开(公告)号：US07668265B2

公开(公告)日：2010-02-23

申请号：US11173840

申请日：2005-07-01

申请人： Jaiganesh Balakrishnan ,  Hirohisa Yamaguchi

发明人： Jaiganesh Balakrishnan ,  Hirohisa Yamaguchi

IPC分类号： H03D1/04

CPC分类号： H04L27/2613 ,  H04B1/719 ,  H04L25/03828 ,  H04L27/2626

摘要： A method of wirelessly communicating is disclosed. The method comprises determining a matrix W based in part on limiting a plurality of active interference cancellation tone values (416), determining the active interference cancellation tone values (416) based on W and based on a plurality of information data values (410), and transmitting an orthogonal frequency division multiplex signal (310) based on the plurality of active interference cancellation tone values (416) and the information data values (410).

摘要翻译： 公开了一种无线通信的方法。 该方法包括：基于限制多个主动干扰消除音调值（416），基于W并基于多个信息数据值（410）确定主动干扰消除音调值（416）来确定矩阵W， 以及基于所述多个有源干扰消除音调值（416）和所述信息数据值（410）发送正交频分复用信号（310）。

公开(公告)号：US20100003933A1

公开(公告)日：2010-01-07

申请号：US11997482

申请日：2006-07-19

申请人： Yoichi Sato ,  Tetsuya Higuchi

发明人： Yoichi Sato ,  Tetsuya Higuchi

IPC分类号： H04B1/04 ,  H04B1/02

CPC分类号： H04L27/34 ,  H04B3/54 ,  H04B2203/5416 ,  H04B2203/5425 ,  H04B2203/5491 ,  H04B2203/5495 ,  H04L25/03828 ,  H04L27/2601

摘要： A signal transmission apparatus of the invention comprises: a correlator 12 for shaping a spectrum of a signal; and a precoder 12 disposed on a previous stage of the correlator and including an adder which subtracts an output signal of a feedback filter from an input signal, a modulo arithmetic unit which inputs an output signal of the adder and executes modulo arithmetic operation, and the feedback filter which inputs an output signal of the modulo arithmetic unit and is provided with a transfer function obtained by subtracting 1 from a transfer function of the correlator. The correlator may be IIR filter means having a desired notch characteristic. By disposing a correlator which can freely shape a transmission signal spectrum containing a deep notch and suppress only a specified band on a receiving side, the suppression of an external noise can also be realized.

摘要翻译： 本发明的信号发送装置包括：相关器12，用于对信号的频谱进行整形; 以及预置编码器12，其配置在相关器的前一级，并且包括从输入信号中减去反馈滤波器的输出信号的加法器，输入加法器的输出信号并执行模运算的模运算单元， 反馈滤波器，其输入模运算单元的输出信号，并且具有通过从相关器的传递函数中减去1而获得的传递函数。 相关器可以是具有期望的陷波特性的IIR滤波器装置。 通过设置可以自由地形成包含深陷波的发送信号频谱并且仅抑制接收侧的指定频带的相关器，也可以实现对外部噪声的抑制。

公开(公告)号：US07630467B2

公开(公告)日：2009-12-08

申请号：US12061956

申请日：2008-04-03

申请人： Vincent Vallet

发明人： Vincent Vallet

IPC分类号： H04L7/00 ,  H04L25/00 ,  H04L25/40

CPC分类号： H04L25/03828 ,  H04L7/0338

摘要： An improved data recovery circuit based on an oversampling technique to select the best data sample to be kept as the data to recover that is only based on accumulating the data edges (or transitions). The incoming serial data stream with jitter is oversampled in an oversampling circuit by means of the multiple phases of a reference clock (clk) to produce data samples. Each sample is compared to the sample(s) collected with the next clock phase(s) in an edge detector circuit to determine the presence of a data edge and the edge information is stored and accumulated in a data edge memory. A selection determination circuit uses the memorized edge information to indicate which sample is the farthest from the data edges. A selection validation circuit validates the selection to avoid false determination due to jitter and skew.

摘要翻译： 一种基于过采样技术的改进的数据恢复电路，用于选择要保留的数据样本，仅作为基于累积数据边缘（或转换）的恢复数据。 具有抖动的输入串行数据流通过参考时钟（clk）的多个相位在过采样电路中过采样，以产生数据采样。 将每个采样与在边缘检测器电路中的下一个时钟相位采集的采样进行比较，以确定数据沿的存在，并将边缘信息存储并存储在数据边缘存储器中。 选择确定电路使用存储的边缘信息来指示哪个采样是距离数据边缘最远的。 选择验证电路验证选择以避免由于抖动和偏斜造成的错误确定。

公开(公告)号：US20090252241A1

公开(公告)日：2009-10-08

申请号：US12380405

申请日：2009-02-25

申请人： Torbjorn A. Larsson ,  Nishant Kumar

发明人： Torbjorn A. Larsson ,  Nishant Kumar

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L5/0007 ,  H04B1/713 ,  H04B1/71635 ,  H04L5/0044 ,  H04L25/03828 ,  H04L27/2623 ,  H04L27/2626

摘要： A method of shaping an orthogonal frequency division multiplexing (OFDM) signal spectrum of a transmitted signal is disclosed. An input signal including an input component is received and a first instance of the input component is generated. The method also includes determining that a second instance of the input component is to be different than the first instance. The second instance of the input component that is different from the first instance is generated. An output signal to be transmitted is generated and includes the first instance and the second instance of the input component.

摘要翻译： 公开了一种形成发射信号的正交频分复用（OFDM）信号频谱的方法。 接收包括输入部件的输入信号，生成输入部件的第一实例。 该方法还包括确定输入组件的第二实例不同于第一实例。 生成与第一个实例不同的输入组件的第二个实例。 生成要发送的输出信号，并且包括输入分量的第一实例和第二实例。

公开(公告)号：USRE40923E1

公开(公告)日：2009-09-29

申请号：US10417013

申请日：2003-04-16

申请人： Jon Anderson ,  Bharat Tarachand Doshi ,  Subrahmanyam Dravida ,  Enrique Hernandez-Valencia ,  Murali Krishnaswamy ,  James S. Manchester

发明人： Jon Anderson ,  Bharat Tarachand Doshi ,  Subrahmanyam Dravida ,  Enrique Hernandez-Valencia ,  Murali Krishnaswamy ,  James S. Manchester

IPC分类号： G06F11/14

CPC分类号： H04J3/1617 ,  H04J3/0623 ,  H04J2203/0076 ,  H04J2203/0083 ,  H04J2203/0089 ,  H04L25/03828 ,  H04L29/06

摘要： A simplified data link protocol which may be implemented in a very high-speed transmission system, e.g., SONET, processes a datagram received from an IP facility according to QoS considerations and scrambles a datagram before it is again scrambled by a transmission system, e.g., a SONET transmitter, to ensure that the pattern of a user's data does not match the transmission scrambling pattern. The data link protocol scrambler also employs a novel synchronization scheme. We also use a pointer system which identifies the location of a datagram in a frame to eliminate flags and the need to process user data to ensure that it does not contain and a boundary flag.

摘要翻译： 可以在非常高速的传输系统（例如SONET）中实现的简化的数据链路协议根据QoS考虑处理从IP设施接收的数据报，并且在数据报再次被传输系统加扰之前进行加扰，例如， SONET发射机，以确保用户数据的模式与传输加扰模式不匹配。 数据链路协议扰码器还采用新颖的同步方案。 我们还使用一个指针系统来标识帧中数据报的位置，以消除标志，并且需要处理用户数据以确保不包含边界标志。