公开(公告)号：US20130094415A1

公开(公告)日：2013-04-18

申请号：US13553195

申请日：2012-07-19

Applicant: Curtis Ling ,  Timothy Gallagher ,  Sridhar Ramesh

Inventor： Curtis Ling ,  Timothy Gallagher ,  Sridhar Ramesh

IPC: H04W52/02

CPC classification number: H04L7/0033 ,  G06F1/3209 ,  G06F1/3234 ,  G06F1/3278 ,  H04L12/2801 ,  H04W52/02 ,  Y02D10/157 ,  Y02D50/20 ,  Y02D70/00 ,  Y02D70/168

Abstract: A CMTS may receive a request that a network device be permitted to enter a power-saving mode of operation. In response, the CMTS may enter a power-saving mode of operation wherein MAC management messages, transmission opportunities for the sleeping network device, and/or contention periods on one or more channels occur at independently determinable intervals. The CMTS may then transmit a message granting the network device permission to enter the power-saving mode of operation. The CMTS may start a sleep timer upon transmitting the MAC management message and may deregister the network device if no communication is received from the network device prior to expiration of the sleep timer. The CMTs may buffer traffic destined for the network device in a buffer of the CMTS while the network device is in the power-saving mode of operation, and may wake the network device upon the amount of buffered traffic reaching a threshold.

Abstract translation: CMTS可以接收允许网络设备进入省电模式的请求。 作为响应，CMTS可以进入功率节省模式，其中MAC管理消息，睡眠网络设备的传输机会和/或一个或多个信道上的争用周期以独立可确定的间隔发生。 然后，CMTS可以发送授权网络设备许可进入节电操作模式的消息。 CMTS可以在发送MAC管理消息时启动睡眠定时器，并且如果在睡眠定时器期满之前没有从网络设备接收到通信，则可以注销网络设备。 当网络设备处于节电操作模式时，CMT可以缓冲在CMTS的缓冲器中的网络设备的流量，并且可以在缓冲流量达到阈值时唤醒网络设备。

公开(公告)号：US08374568B2

公开(公告)日：2013-02-12

申请号：US13568286

申请日：2012-08-07

Applicant: Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

Inventor： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

IPC: H04B1/10 ,  H04B15/06

CPC classification number: H04B1/26 ,  H03D3/007 ,  H03D3/008 ,  H03D3/009 ,  H03D7/14 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1475 ,  H03D7/165 ,  H03D7/166 ,  H03D2200/0086 ,  H03H11/22 ,  H04B1/10 ,  H04B1/109 ,  H04B1/12 ,  H04B1/30 ,  H04B15/00 ,  H04J1/18 ,  H04L27/34

Abstract: Receiver architectures and methods of processing harmonic rich input signals employing harmonic suppression mixers are disclosed herein. The disclosed receivers, mixers, and methods enable a receiver to achieve the advantages of switching mixers while greatly reducing the mixer response to the undesired harmonics. A harmonic mixer can include a plurality of mixers coupled to an input signal. A plurality of phases of a local oscillator signal can be generated from a single local oscillator output. Each of the phases can be used to drive an input of one of the mixers. The mixer outputs can be combined to generate a frequency converted output that has harmonic rejection.

Abstract translation: 本文公开了采用谐波抑制混频器处理谐波丰富输入信号的接收机架构和方法。 所公开的接收机，混频器和方法使得接收机能够实现切换混频器的优点，同时大大降低了混频器对不需要的谐波的响应。 谐波混频器可以包括耦合到输入信号的多个混频器。 可以从单个本地振荡器输出产生本地振荡器信号的多个相位。 每个相都可用于驱动混合器之一的输入。 混频器输出可以组合以产生具有谐波抑制的频率转换输出。

公开(公告)号：US20120300887A1

公开(公告)日：2012-11-29

申请号：US13568562

申请日：2012-08-07

Applicant: Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

Inventor： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

IPC: H04B1/16

CPC classification number: H04B1/26 ,  H03D3/007 ,  H03D3/008 ,  H03D3/009 ,  H03D7/14 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1475 ,  H03D7/165 ,  H03D7/166 ,  H03D2200/0086 ,  H03H11/22 ,  H04B1/10 ,  H04B1/109 ,  H04B1/12 ,  H04B1/30 ,  H04B15/00 ,  H04J1/18 ,  H04L27/34

Abstract: Receiver architectures and methods of processing harmonic rich input signals employing harmonic suppression mixers are disclosed herein. The disclosed receivers, mixers, and methods enable a receiver to achieve the advantages of switching mixers while greatly reducing the mixer response to the undesired harmonics. A harmonic mixer can include a plurality of mixers coupled to an input signal. A plurality of phases of a local oscillator signal can be generated from a single local oscillator output. Each of the phases can be used to drive an input of one of the mixers. The mixer outputs can be combined to generate a frequency converted output that has harmonic rejection.

Abstract translation: 本文公开了采用谐波抑制混频器处理谐波丰富输入信号的接收机架构和方法。 所公开的接收机，混频器和方法使得接收机能够实现切换混频器的优点，同时大大降低了混频器对不需要的谐波的响应。 谐波混频器可以包括耦合到输入信号的多个混频器。 可以从单个本地振荡器输出产生本地振荡器信号的多个相位。 每个相都可用于驱动混合器之一的输入。 混频器输出可以组合以产生具有谐波抑制的频率转换输出。

公开(公告)号：US20120281787A1

公开(公告)日：2012-11-08

申请号：US13462717

申请日：2012-05-02

Applicant: Yongtao Wang ,  Curtis Ling ,  Tim Gallagher

Inventor： Yongtao Wang ,  Curtis Ling ,  Tim Gallagher

IPC: H03K9/00

CPC classification number: H04L27/3863 ,  H04L27/2334 ,  H04L27/2338 ,  H04L27/361 ,  H04L27/366

Abstract: Methods and systems for I/Q mismatch calibration and compensation for wideband communication receivers may comprise receiving a plurality of radio frequency (RF) channels, downconverting the received plurality of received RF channels to baseband frequencies, determining and removing average in-phase (I) and quadrature (Q) gain and phase mismatch of the downconverted channels, determining a residual phase and amplitude tilt of the downconverted channels with removed average I and Q gain and phase mismatch, and compensating for said residual phase and amplitude tilt I and Q gain and phase mismatch of the downconverted channels. The determined phase tilt may be compensated utilizing a phase tilt correction filter, which may comprise one or more all-pass filters. The average I and Q gain and phase mismatch may be determined utilizing a blind source separation (BSS) estimation algorithm.

Abstract translation: 用于宽带通信接收机的I / Q失配校准和补偿的方法和系统可以包括：接收多个射频（RF）信道，将接收的多个接收的RF信道下变频到基带频率，确定和去除平均同相（I） 和下变频信道的正交（Q）增益和相位失配，确定下变频信道的剩余相位和振幅倾斜，其中去除了平均I和Q增益和相位失配，并补偿所述剩余相位和振幅倾斜I和Q增益， 下变频通道的相位失配。 可以使用可以包括一个或多个全通滤波器的相位倾斜校正滤波器来补偿确定的相位倾斜。 可以使用盲源分离（BSS）估计算法来确定平均I和Q增益和相位失配。

公开(公告)号：US20110009080A1

公开(公告)日：2011-01-13

申请号：US12831201

申请日：2010-07-06

Applicant: Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

Inventor： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

IPC: H03D5/00

CPC classification number: H04L5/06 ,  H03D3/008 ,  H03D3/009 ,  H03D7/166 ,  H04B1/30

Abstract: A receiver can be configured to include an RF front end that is configured to downconvert a received signal to a baseband signal or a low Intermediate Frequency (IF) signal. The receiver can downconvert the desired signal from an RF frequency in the presence of numerous interference sources to a baseband or low IF signal for filtering and channel selection. The filtered baseband or low IF signal can be converted to a digital representation. The digital representation of the signal can be upconverted in the digital domain to a programmable IF frequency. The digital IF signal can be converted to an analog IF signal that can be processed by legacy hardware.

Abstract translation: 接收机可以被配置为包括被配置为将接收到的信号下变频为基带信号或低中频（IF）信号的RF前端。 接收机可以在存在多个干扰源的情况下将来自RF频率的期望信号下变频到用于滤波和信道选择的基带或低IF信号。 滤波后的基带或低IF信号可以转换为数字表示。 信号的数字表示可以在数字域中上转换成可编程的中频。 数字IF信号可以转换为可由传统硬件处理的模拟IF信号。

公开(公告)号：US07778613B2

公开(公告)日：2010-08-17

申请号：US11106055

申请日：2005-04-13

Applicant: Kishore Seendripu ,  Raymond Montemayor ,  Curtis Ling ,  Glenn Chang ,  Sheng Ye

Inventor： Kishore Seendripu ,  Raymond Montemayor ,  Curtis Ling ,  Glenn Chang ,  Sheng Ye

IPC: H04B1/18 ,  H04B1/10 ,  H04B1/26

CPC classification number: H04L27/3863 ,  H03D3/009 ,  H04B1/1036 ,  H04B1/30

Abstract: A dual conversion receiver architecture that converts a radio frequency signal to produce a programmable intermediate frequency whose channel bandwidth and frequency can be changed using variable low-pass filtering to accommodate multiple standards for television and other wireless standards. The dual conversion receiver uses a two stage frequency translation and continual DC offset removal. The dual conversion receiver can be completely implemented on an integrated circuit with no external adjustments.

Abstract translation: 一种双转换接收器架构，其转换射频信号以产生可编程中频，其可以使用可变低通滤波来改变其通道带宽和频率，以适应电视和其他无线标准的多种标准。 双转换接收机使用两级频率转换和连续DC偏移去除。 双转换接收器可以在没有外部调整的集成电路上完全实现。

公开(公告)号：US20090098845A1

公开(公告)日：2009-04-16

申请号：US12243692

申请日：2008-10-01

Applicant: Curtis Ling ,  Andy Lo ,  Tete Sedalo

Inventor： Curtis Ling ,  Andy Lo ,  Tete Sedalo

IPC: H04B1/06

CPC classification number: H04B1/16 ,  H04B1/40

Abstract: A wireless communication receiver includes a multitude of look-up tables each storing a multitude of DC offset values associated with the gains of an amplification stage disposed in the wireless communication receiver. The entries for each look-up table are estimated during a stage of the calibration phase. During such a calibration stage, for each selected gain of an amplification stage, a search logic estimates a current DC offset number and compares it to a previous DC offset estimate that is fed back to the search logic. If the difference between the current and previous estimates is less than a predefined threshold value, the current estimate is treated as being associated with the DC offset of the selected gain of the amplification stage and is stored in the look-up table. This process is repeated for each selected gain of each amplification stage of interest until the look-up tables are populated.

Abstract translation: 无线通信接收机包括多个查找表，每个查找表存储与设置在无线通信接收机中的放大级的增益相关联的多个DC偏移值。 在校准阶段的阶段估计每个查找表的条目。 在这样的校准阶段期间，对于放大级的每个所选增益，搜索逻辑估计当前DC偏移数，并将其与反馈到搜索逻辑的先前DC偏移估计进行比较。 如果当前和先前估计之间的差值小于预定义的阈值，则将当前估计值视为与放大级的所选增益的DC偏移相关联，并存储在查找表中。 对于感兴趣的每个扩增阶段的每个选定的增益重复该过程，直到查找表被填充。

公开(公告)号：US20090098844A1

公开(公告)日：2009-04-16

申请号：US12247908

申请日：2008-10-08

Applicant: Anand K. Anandakumar ,  Curtis Ling ,  Sugbong Kang

Inventor： Anand K. Anandakumar ,  Curtis Ling ,  Sugbong Kang

IPC: H04B1/16 ,  H03M1/12

CPC classification number: H04B7/0857

Abstract: A wireless diversity receiver includes, in part, N signal processing paths, a bin-wise combiner, and an inverse transformation module. Each signal processing path includes, in part, a mixer adapted to downconvert a frequency of an RF signal received by that path, an analog-to-digital converter adapted to convert the downconverted signal from an analog signal to a digital signal, and a transformation block adapted to transform the digital signal represented in time domain to an associated frequency domain signal having M subband signals. The bin-wise combiner is configured to combine the corresponding subband signals of the N paths. The inverse transformation block is configured to transform the output of the bin-wise combiner to an associated time-domain signal.

Abstract translation: 无线分集接收机部分地包括N个信号处理路径，二进制组合器和逆变换模块。 每个信号处理路径部分地包括适于将由该路径接收的RF信号的频率下变频的混频器，适于将下变频信号从模拟信号转换为数字信号的模拟 - 数字转换器，以及转换 块，适于将在时域中表示的数字信号变换为具有M个子带信号的相关联的频域信号。 二进制组合器被配置为组合N个路径的相应子带信号。 逆变换块被配置为将二进制组合器的输出变换为相关联的时域信号。

公开(公告)号：US20080096509A1

公开(公告)日：2008-04-24

申请号：US11874854

申请日：2007-10-18

Applicant: Curtis Ling

Inventor： Curtis Ling

IPC: H04B1/06

CPC classification number: H04B7/084

Abstract: A diversity receiver and methods of diversity combining are described herein. Diversity combining can be implemented in the front-end signal path of a receiver, without the need to digitally demodulate the baseband signals. Each diversity path is downconverted using a common LO. A portion of each downconverted diversity path is filtered and coupled to an input of a correlator. The diversity paths are paired for the purposes of correlation. The output of the correlator is used to adjust the phase of one of the diversity paths. The amplitude of each diversity path can be equalized or can be adjusted based on a signal metric. The phase adjusted diversity signals can be summed in a signal combiner. The summed signal can be processed as a single receive signal using a single filter and baseband processor.

Abstract translation: 本文描述了分集接收机和分集组合的方法。 可以在接收机的前端信号路径中实现分集组合，而不需要对基带信号进行数字解调。 每个分集路径使用公共LO进行下变频。 每个下变频分集路径的一部分被滤波并耦合到相关器的输入端。 为了相关的目的，分集路径配对。 相关器的输出用于调整一个分集路径的相位。 可以基于信号度量来均衡或者可以调整每个分集路径的幅度。 相位调整分集信号可以在信号组合器中相加。 总和信号可以使用单个滤波器和基带处理器作为单个接收信号来处理。

公开(公告)号：US07362178B2

公开(公告)日：2008-04-22

申请号：US11464162

申请日：2006-08-11

Applicant: Raymond Montemayor ,  Curtis Ling

Inventor： Raymond Montemayor ,  Curtis Ling

IPC: H03G3/10

CPC classification number: H03G3/3052

Abstract: Linear wide dynamic range variable gain amplifiers can be configured using a variable gain amplifier having an abbreviated gain control range in combination with a discrete attenuator controlled to select an attenuation from a predetermined set of attenuation values. The variable gain amplifier is configured to provide substantially linear gain control over the abbreviated gain control range, where the abbreviated gain control range is less than a total desired gain control range. The difference between adjacent attenuation values in the set of attenuation values is configured to be approximately less than or equal to the abbreviated gain control range.

Abstract translation: 线性宽动态范围可变增益放大器可以使用具有缩写增益控制范围的可变增益放大器与被控制为从预定衰减值集合中选择衰减的离散衰减器组合来配置。 可变增益放大器被配置为在缩写增益控制范围上提供基本线性增益控制，其中缩写增益控制范围小于总期望增益控制范围。 该组衰减值中的相邻衰减值之间的差被配置为近似小于或等于缩写增益控制范围。