公开(公告)号：US20150156535A1

公开(公告)日：2015-06-04

申请号：US14614543

申请日：2015-02-05

Applicant: MaxLinear, Inc.

Inventor： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC: H04N21/426 ,  H04N21/438 ,  H04N21/454 ,  H04N5/50

CPC classification number: H04N21/4263 ,  H04B1/0014 ,  H04N5/455 ,  H04N5/50 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/454 ,  H04N21/6143 ,  H04N21/6193

Abstract: A wideband receiver system comprises a mixer module, a wideband analog-to-digital converter (ADC) module, and digital circuitry. The mixer module is configured to downconvert a plurality of frequencies that comprises a plurality of desired television channels and a plurality of undesired television channels. The wideband ADC module is configured to digitize the swatch of frequencies comprising the plurality of desired television channels and the plurality of undesired television channels. The digital circuitry is configured to select the desired plurality of television channels from the digitized plurality of frequencies, and output the selected plurality of television channels to a demodulator as a digital datastream.

Abstract translation: 宽带接收机系统包括混频器模块，宽带模数转换器（ADC）模块和数字电路。 混频器模块被配置为对包括多个所需电视频道和多个不期望的电视频道的多个频率进行下变频。 宽带ADC模块被配置为数字化包括多个所需电视频道和多个不想要的电视频道的频率的频率。 数字电路被配置为从数字化的多个频率中选择期望的多个电视频道，并且将所选择的多个电视频道作为数字数据流输出到解调器。

公开(公告)号：US20150156444A1

公开(公告)日：2015-06-04

申请号：US14617973

申请日：2015-02-10

Applicant: MaxLinear, Inc.

Inventor： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC: H04N5/50 ,  H04N21/61 ,  H04N21/426 ,  H04N21/438

CPC classification number: H04N21/4263 ,  H04B1/0014 ,  H04N5/455 ,  H04N5/50 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/454 ,  H04N21/6143 ,  H04N21/6193

Abstract: A wideband receiver system comprises a wideband analog-to-digital converter (ADC) module and a digital frontend (DFE) module. The wideband ADC is configured to concurrently digitize a band of frequencies comprising a plurality of desired channels and a plurality of undesired channels. The DFE module is coupled to the digital in-phase and quadrature signals. The DFE module is configured to select the plurality of desired channels from the digitized band of frequencies, and generate an intermediate frequency (IF) signal comprising the selected plurality of desired channels and having a bandwidth that is less than a bandwidth of the band of frequencies, where the generation comprises frequency shifting of the selected plurality of desired channels. The IF signal may be a digital signal and the DFE is configured to output the IF signal via a serial or parallel interface.

Abstract translation: 宽带接收机系统包括宽带模数转换器（ADC）模块和数字前端（DFE）模块。 宽带ADC被配置为同时数字化包括多个期望信道和多个不期望信道的频带。 DFE模块耦合到数字同相和正交信号。 DFE模块被配置为从数字化的频带选择多个期望的信道，并且生成包括所选择的多个期望信道并且具有小于频带的带宽的带宽的中频（IF）信号 ，其中所述一代包括所选择的多个期望信道的频移。 IF信号可以是数字信号，并且DFE被配置为经由串行或并行接口输出IF信号。

公开(公告)号：US20140376673A1

公开(公告)日：2014-12-25

申请号：US14469281

申请日：2014-08-26

Applicant: Maxlinear, Inc.

Inventor： Yangtao Wang ,  Curtis Ling ,  Tim Gallagher

IPC: H04L27/38 ,  H04L27/233

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 include receiving a radio frequency (RF) signal in a receiver of a communication device, down-sampling the received RF signal to generate a channel k and its image channel −k at baseband frequencies, and determining average in-phase (I) and quadrature (Q) gain and phase mismatch of the channel k and the image channel −k. A curvature of gain mismatch for the channel k and the image channel −k may be estimate utilizing a blind source separation (BSS) estimation algorithm. The average I and Q gain and phase mismatch of the channel k and the image channel −k may be removed. A residual phase tilt and a residual amplitude tilt of the channel k and the image channel −k (with removed average I and Q gain and phase mismatch) may be determined.

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在通信设备的接收机中接收射频（RF）信号，对所接收的RF信号进行下采样以产生信道k及其图像信道 - k，并确定通道k和图像通道-k的平均同相（I）和正交（Q）增益和相位失配。 可以使用盲源分离（BSS）估计算法来估计信道k和图像信道-k的增益失配曲率。 可以消除通道k和图像通道-k的平均I和Q增益和相位失配。 可以确定通道k和图像通道-k（具有去除的平均I和Q增益和相位失配）的残余相位倾斜和残余幅度倾斜。