公开(公告)号：US09661111B2

公开(公告)日：2017-05-23

申请号：US15075258

申请日：2016-03-21

Applicant: MaxLinear, Inc.

Inventor： Anand Anandakumar ,  Serdar Yilmaz ,  Chi-Foun Kuen ,  Ravi Aripirala

IPC: H04L29/06 ,  H04L12/933 ,  H04J3/06 ,  H04L12/46 ,  H04N21/426 ,  H04N21/434 ,  H04N21/438 ,  H04N21/4385 ,  H04N5/44 ,  H04N5/455

CPC classification number: H04L69/22 ,  H04J3/0658 ,  H04L12/4633 ,  H04L29/06176 ,  H04L49/101 ,  H04L65/607 ,  H04L69/28 ,  H04N5/44 ,  H04N5/455 ,  H04N21/4263 ,  H04N21/4343 ,  H04N21/4346 ,  H04N21/4382 ,  H04N21/4385

Abstract: An integrated circuit may comprise a tuner operable to digitize a band of frequencies comprising a plurality of television channels, a crossbar operable to select one or more of the plurality of television channels output by the tuner, a plurality of demodulators operable to receive the selected one or more television channels from the crossbar and demodulate the selected one or more television channels to recover a plurality of transport streams, a transport module operable to multiplex the plurality of transport streams into a single packet stream, and a framer operable to: encapsulate packets of the plurality of transport streams into transport stream frames of a serial datastream, and insert filler frames into the serial datastream after every Nth transport stream frame of the serial datastream, where N is an integer.

公开(公告)号：US09565038B2

公开(公告)日：2017-02-07

申请号：US15006327

申请日：2016-01-26

Applicant: Maxlinear, Inc.

Inventor： Ioannis Spyropoulos ,  Anand Anandakumar

IPC: H01L25/03 ,  H04L25/03 ,  H04B1/16

CPC classification number: H04L25/03184 ,  H04B1/16

Abstract: An electronic receiver may generate a differential detection sequence based on a received symbol sequence and based on a m-symbol delayed version of the received symbol sequence, where m is an integer greater than 1. The particular differential detection sequence may be a result of an element-by-element multiplication of the particular received symbol sequence and the conjugate of an m-symbol delayed version of the particular received symbol sequence. The receiver may calculate differential decision metrics based on the differential detection sequence and based on a set of differential symbol sequences generated from the set of possible transmitted symbol sequences. The receiver may generate a decision as to which of a set of possible transmitted symbol sequences resulted in the received symbol sequence, where the decision is based on the differential decision metrics and the set of possible transmitted symbols sequences.

Abstract translation: 电子接收机可以基于接收到的符号序列并基于接收符号序列的m符号延迟版本来生成差分检测序列，其中m是大于1的整数。特定的差分检测序列可以是 特定接收符号序列的逐个元素乘法和特定接收符号序列的m符号延迟版本的共轭。 接收机可以基于差分检测序列并且基于从该组可能发送的符号序列生成的一组差分符号序列来计算差分决策度量。 接收机可以产生关于一组可能的传输符号序列中的哪一个导致接收到的符号序列的决定，其中该决定基于差分决策度量和可能发送的符号序列的集合。

公开(公告)号：US20160352427A1

公开(公告)日：2016-12-01

申请号：US15164534

申请日：2016-05-25

Applicant: Maxlinear, Inc.

Inventor： Anand Anandakumar ,  Ioannis Spyropoulos ,  Curtis Ling

IPC: H04B10/2507 ,  H04B10/58 ,  H04B10/079

CPC classification number: H04B10/2507 ,  H04B10/0795 ,  H04B10/0799 ,  H04B10/40 ,  H04B10/564 ,  H04B10/58

Abstract: Aspects of a method and system for feedback during optical communications are provided. In one embodiment, a system for optical communications comprises a digital-to-analog converter (DAC), a driver, and a transmit optical subsystem. The DAC is operable to receive a digital code of a plurality of digital codes and output an analog current signal having an analog current level of a plurality of analog current levels. The driver is operable to condition the analog current signal output from the digital-to-analog converter. The transmit optical subsystem is operable to generate an optical signal from the conditioned analog current signal. A digital modification of an input digital signal is dynamically controlled by a feedback path according to one or more characteristics of the optical signal. The one or more characteristics comprise a nonlinearity that may be temperature dependent.

Abstract translation: 提供了在光通信期间的反馈方法和系统的方面。 在一个实施例中，用于光通信的系统包括数模转换器（DAC），驱动器和发射光学子系统。 DAC可操作地接收多个数字代码的数字代码并输出具有多个模拟电流电平的模拟电流电平的模拟电流信号。 驱动器可操作以调节从数模转换器输出的模拟电流信号。 发射光学子系统可操作以从经调节的模拟电流信号产生光信号。 根据光信号的一个或多个特性，通过反馈路径来动态地控制输入数字信号的数字修改。 一个或多个特征包括可能是温度依赖性的非线性。

公开(公告)号：US20160323133A1

公开(公告)日：2016-11-03

申请号：US15208544

申请日：2016-07-12

Applicant: Maxlinear, Inc.

Inventor： Seung-Chul Hong ,  Anand Anandakumar ,  Curtis Ling

IPC: H04L27/26 ,  H04L7/00 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04L1/0023 ,  H04L5/0007 ,  H04L7/0016 ,  H04L25/0216 ,  H04L27/265 ,  H04L27/2665 ,  H04L27/2671 ,  H04L27/2695

Abstract: Systems and methods for adjusting timing in a communication system, such as an OFDM system are described. In one implementation an error signal is generated to adjust the timing of a variable rate interpolator so as to adjust FFT timing. The error signal may be based on detection of significant peaks in an estimate of the impulse response of the channel, with the peak locations being tracked over subsequent symbols and the system timing adjusted in response to changes in the peaks.

Abstract translation: 描述了用于调整诸如OFDM系统的通信系统中的定时的系统和方法。 在一个实现中，产生误差信号以调整可变速率内插器的定时，以便调整FFT定时。 误差信号可以基于在通道的脉冲响应的估计中检测到有效峰值，其中峰值位置在随后的符号上被跟踪，并且响应于峰值的变化来调整系统时序。

公开(公告)号：US20160127119A1

公开(公告)日：2016-05-05

申请号：US14976529

申请日：2015-12-21

Applicant: Maxlinear, Inc.

Inventor： Subramanian Anantharaman Chandrasekarapuram ,  Anand Anandakumar ,  Stephane Laurent-Michel ,  Sheng Ye ,  Raja Pullela ,  Glenn Chang ,  Vamsi Paidi

IPC: H04L7/00

CPC classification number: H04B1/1027

Abstract: A system comprises a microwave backhaul outdoor unit having a first resonant circuit, phase error determination circuitry, and phase error compensation circuitry. The first resonant circuit is operable to generate a first signal characterized by a first amount of phase noise and a first amount of temperature stability. The phase error determination circuitry is operable to generate a phase error signal indicative of phase error between the first signal and a second signal, wherein the second signal is characterized by a second amount of phase noise that is greater than the first amount of phase noise, and the second signal is characterized by a second amount of temperature instability that is less than the first amount of temperature instability. The phase error compensation circuitry is operable to adjust the phase of a data signal based on the phase error signal, the adjustment resulting in a phase compensated signal.

公开(公告)号：US09294592B2

公开(公告)日：2016-03-22

申请号：US14684605

申请日：2015-04-13

Applicant: MaxLinear, Inc.

Inventor： Anand Anandakumar ,  Serdar Yilmaz ,  Chi-Foun Kuen ,  Ravi Aripirala

IPC: H04L29/06 ,  H04L12/933 ,  H04J3/06

CPC classification number: H04L69/22 ,  H04J3/0658 ,  H04L12/4633 ,  H04L29/06176 ,  H04L49/101 ,  H04L65/607 ,  H04L69/28 ,  H04N5/44 ,  H04N5/455 ,  H04N21/4263 ,  H04N21/4343 ,  H04N21/4346 ,  H04N21/4382 ,  H04N21/4385

Abstract: An integrated circuit may comprise a tuner operable to digitize a band of frequencies comprising a plurality of television channels, a crossbar operable to select one or more of the plurality of television channels output by the tuner, a plurality of demodulators operable to receive the selected one or more television channels from the crossbar and demodulate the selected one or more television channels to recover a plurality of transport streams, a transport module operable to multiplex the plurality of transport streams into a single packet stream, and a framer operable to: encapsulate packets of the plurality of transport streams into transport stream frames of a serial datastream, and insert filler frames into the serial datastream after every Nth transport stream frame of the serial datastream, where N is an integer.

公开(公告)号：US09172386B2

公开(公告)日：2015-10-27

申请号：US14590250

申请日：2015-01-06

Applicant: Maxlinear, Inc.

Inventor： Pawandeep Taluja ,  Mingrui Zhu ,  Xuefeng Chen ,  Anand Anandakumar ,  Sheng Ye ,  Timothy Leo Gallagher

IPC: H03M1/06 ,  H03M1/50 ,  H03M1/10 ,  H03M1/12 ,  H04L7/00 ,  H04L25/08

CPC classification number: H03M1/0612 ,  H03M1/1009 ,  H03M1/1038 ,  H03M1/1215 ,  H03M1/50 ,  H04L7/0087 ,  H04L25/08 ,  H04W56/00

Abstract: Methods and systems for time interleaved analog-to-digital converter timing mismatch calibration and compensation may comprise receiving an analog signal on a chip, converting the analog signal to a digital signal utilizing a time interleaved analog-to-digital-converter (ADC), and reducing a blocker signal that is generated by timing offsets in the time interleaved ADC by estimating complex coupling coefficients between a desired digital output signal and the blocker signal. A decorrelation algorithm may comprise a symmetric adaptive decorrelation algorithm. The received analog signal may be generated by a calibration tone generator on the chip. An aliased signal may be summed with an output signal from a multiplier. The complex coupling coefficients may be determined utilizing the decorrelation algorithm on the summed signals. A multiplier may be configured to cancel the blocker signal utilizing the determined complex coupling coefficients.

Abstract translation: 用于时间交织的模数转换器定时失配校准和补偿的方法和系统可以包括在芯片上接收模拟信号，利用时间交织的模数转换器（ADC）将模拟信号转换成数字信号， 并且通过估计期望的数字输出信号和阻塞信号之间的复耦合系数来减少由时间交错ADC中的定时偏移产生的阻塞信号。 解相关算法可以包括对称自适应去相关算法。 所接收的模拟信号可以由芯片上的校准音发生器产生。 混叠信号可以与来自乘法器的输出信号相加。 复数耦合系数可以利用求和信号上的去相关算法来确定。 乘法器可以被配置为利用所确定的复耦合系数来消除阻塞信号。

公开(公告)号：US20150276935A1

公开(公告)日：2015-10-01

申请号：US14739659

申请日：2015-06-15

Applicant: Maxlinear, Inc.

Inventor： Maxime Leclercq ,  Ioannis Spyropoulos ,  Nishant Kumar ,  Anand Anandakumar

IPC: G01S19/46 ,  H04W64/00 ,  H04B7/185

CPC classification number: G01S19/46 ,  H04B7/1853 ,  H04B7/18547 ,  H04W64/006

Abstract: Methods and systems for repurposing of a global navigation satellite system receiver for receiving low-earth orbit (LEO) communication satellite timing signals may comprise receiving a medium Earth orbit (MEO) satellite signal and/or a LEO signal in a receiver of the communication device. The MEO or LEO signal may be down-converted, and a position of the communication device may be calculated utilizing the down-converted signal. The signal may be down-converted utilizing a local oscillator signal generated by a phase locked loop (PLL), which may be delta-sigma modulated via a fractional-N divider. A clock signal may be communicated to the PLL utilizing a temperature-compensated crystal oscillator. The signal may be down-converted to an intermediate frequency or down-converted directly to baseband frequencies. The signal may be processed utilizing surface acoustic wave (SAW) filters. In-phase and quadrature signals may be processed in the RF path utilizing a two-stage polyphase filter.

Abstract translation: 用于重新利用用于接收低地球轨道（LEO）通信卫星定时信号的全球导航卫星系统接收机的方法和系统可以包括在通信设备的接收机中接收介质地球轨道（MEO）卫星信号和/或LEO信号 。 可以对MEO或LEO信号进行下变频，并且可以利用下变频信号来计算通信装置的位置。 信号可以利用由锁相环（PLL）产生的本地振荡器信号进行下变频，锁相环（PLL）可以经由分数N分频器进行Δ-Σ调制。 可以使用温度补偿晶体振荡器将时钟信号传送到PLL。 信号可以被下变频到中频或直接下变频到基带频率。 可以使用表面声波（SAW）滤波器来处理信号。 可以使用两级多相滤波器在RF路径中处理同相和正交信号。