公开(公告)号：US20160065179A1

公开(公告)日：2016-03-03

申请号：US14471608

申请日：2014-08-28

申请人： QUALCOMM Incorporated

发明人： Mazhareddin TAGHIVAND ,  Tong ZHANG ,  Mohammad Mahdi GHAHRAMANI

IPC分类号： H03H11/12 ,  H03H11/22

CPC分类号： H03H11/1204 ,  H03H7/0153 ,  H03H7/21 ,  H03H11/22 ,  H03H17/0273 ,  H03H2218/04

摘要： Certain aspects of the present disclosure provide circuits for generating high accuracy millimeter wave or radio frequency (RF) wideband in-phase (I) and quadrature (Q) oscillating signals having acceptable amplitude and phase mismatch over process, voltage, and temperature (PVT) variations with reduced cost, area, and power consumption. In one example apparatus, a polyphase filter having a first stage and a second stage is provided. Each stage comprises resistive elements and capacitive elements. Certain aspects of the present disclosure provide for intentional resistive and/or capacitive value mismatch between the resistive or capacitive values of one or multiple stages such that the phase mismatch between the resulting I and Q signals may be reduced without degrading the amplitude mismatch. Certain aspects of the present disclosure provide for replacing the resistive elements in at least one stage with transistors operating in the triode region, where the on-resistance is controlled by a feedback network.

摘要翻译： 本公开的某些方面提供用于产生在过程，电压和温度（PVT）上具有可接受的幅度和相位失配的高精度毫米波或射频（RF）宽带同相（I）和正交（Q）振荡信号的电路， 降低成本，面积和功耗的变化。 在一个示例性装置中，提供具有第一阶段和第二阶段的多相滤波器。 每个级包括电阻元件和电容元件。 本公开的某些方面提供一个或多个级的电阻或电容值之间的有意的电阻和/或电容值失配，使得可以在不降低幅度失配的情况下减小所产生的I和Q信号之间的相位失配。 本公开的某些方面提供了在三极管区域中操作的晶体管在至少一个级中替换电阻元件，其中导通电阻由反馈网络控制。

公开(公告)号：US07403577B2

公开(公告)日：2008-07-22

申请号：US10864201

申请日：2004-06-09

申请人： Rajendra Kumar

发明人： Rajendra Kumar

IPC分类号： H04L27/00

CPC分类号： H04L5/06 ,  H03H17/0213 ,  H03H17/0273

摘要： A computation efficient polyphase channelization system enables one of many user FDMA signals to be channelized through multiple FFT response frequency bands forming an aggregate frequency band where K-point FFT channels are greater than the decimation factor M to produce FFT overlapped responses that have a smooth aggregate response without disjointed band gaps for reduced distortion using a clockwise commutator having M channels feeding M filter blocks, each of which having β polyphase filters, and having a ring switch to provide smooth filter responses that then drive β K-point FFTs to provide a β set of K vector FFT responses that are then combined in a post processing system for producing K channelized outputs.

摘要翻译： 计算有效的多相信道化系统使得许多用户FDMA信号中的一个可以通过形成K点FFT信道大于抽取因子M的聚合频带的多个FFT响应频带被信道化，以产生具有平滑聚合的FFT重叠响应 使用具有M个通道的顺时针换向器的不相干带隙的响应，其馈送M个滤波器块，每个滤波器块具有β多相滤波器，并且具有环形开关以提供平滑的滤波器响应，然后驱动βK点FFT以提供β 一组K向量FFT响应，然后在用于产生K个信道化输出的后处理系统中组合。

公开(公告)号：US06411225B1

公开(公告)日：2002-06-25

申请号：US09552649

申请日：2000-04-19

申请人： Adrianus Wilhelmus Maria Van Den Enden ,  Rutgerus Elisabertus Eduardus Franciscus Suermondt ,  Marc Victor Arends

发明人： Adrianus Wilhelmus Maria Van Den Enden ,  Rutgerus Elisabertus Eduardus Franciscus Suermondt ,  Marc Victor Arends

IPC分类号： H03M700

CPC分类号： H03H17/0286 ,  H03H17/0273 ,  H03H17/0621 ,  H03H17/0628 ,  H03H17/0642

摘要： Sample rate converters are known, and are used to convert a signal with a first sample rate (sampling frequency) into a signal with a second sample rate (sampling frequency). To obtain a flexible sample rate converter with sampling frequencies that are not known beforehand, until now only sample rate converters with very high intermediate sampling frequencies are known. The invention provides a flexible sample rate converter, which is able to handle unknown input and output sampling frequencies. This is achieved by using polyphase decomposition filter means in combination with interpolation means.

摘要翻译： 采样率转换器是已知的，并且用于将具有第一采样率（采样频率）的信号转换成具有第二采样率（采样频率）的信号。 为了获得具有预先不知道的采样频率的灵活采样率转换器，到目前为止，已知仅具有非常高的中间采样频率的采样率转换器。 本发明提供了一种灵活的采样率转换器，其能够处理未知的输入和输出采样频率。 这通过使用多相分解滤波器装置与插值装置组合来实现。

公开(公告)号：US06307903B1

公开(公告)日：2001-10-23

申请号：US09360600

申请日：1999-07-26

申请人： Fred Harris ,  Vlad Bril

发明人： Fred Harris ,  Vlad Bril

IPC分类号： H04B110

CPC分类号： H03H17/0288 ,  H03H17/0273 ,  H03H17/0277 ,  H03H17/0657 ,  H03H17/0664 ,  H03H17/0671 ,  H04L25/0232 ,  H04L25/03038

摘要： A low pass digital filter using cascade polyphase recursive digital signal processing circuit. The filter in the receive direction may contain a re-sampling Hogenauer filter followed by an equalizer filter to correct for its non-flat pass-band spectral response. The output of the spectral equalizer may be processed by a poly-phase re-sampling filter to reduce the sample rate. A clean-up filter may insert two stop-band spectral intervals in the frequency response of the earlier stages. The filter in the receive direction may be implemented by using similar components in the reverse order.

摘要翻译： 一种使用级联多相递归数字信号处理电路的低通数字滤波器。 在接收方向上的滤波器可以包含一个重新采样Hogenauer滤波器，随后是均衡滤波器，以校正其非平坦的通带频谱响应。 频谱均衡器的输出可以由多相重采样滤波器处理以降低采样速率。 清理滤波器可以在早期阶段的频率响应中插入两个阻带频谱间隔。 接收方向上的滤波器可以通过以相反的顺序使用类似的组件来实现。

公开(公告)号：US20180367169A1

公开(公告)日：2018-12-20

申请号：US16110478

申请日：2018-08-23

申请人： Texas Instruments Incorporated

发明人： Jaiganesh Balakrishnan ,  Suvam Nandi ,  Sundarrajan Rangachari

IPC分类号： H04B1/00 ,  H04B1/10 ,  H04B1/04 ,  G06F5/01 ,  H03H17/06 ,  H03H17/02

CPC分类号： H04B1/0042 ,  G06F5/01 ,  H03H17/0211 ,  H03H17/0273 ,  H03H17/0275 ,  H03H17/0657 ,  H03H17/0664 ,  H04B1/0046 ,  H04B1/0475 ,  H04B1/1027

摘要： A digital filter for interpolation or decimation and a device incorporating the digital filter is disclosed. The digital filter includes a filter block, a first transformation circuit coupled to the filter block and an input stream coupled to provide input values to a component selected from the filter block and the first transformation circuit. The filter block includes a pair of sub-filters having respective transformed coefficients, the respective transformed coefficients of a first sub-filter of the pair of sub-filters being symmetric and the respective transformed coefficients of a second sub-filter of the pair of sub-filters being anti-symmetric. The first transformation circuit is coupled to perform a first transformation; the filter block and the first transformation circuit together provide suppression of undesired spectral images in final outputs of the digital filter.

公开(公告)号：US07397404B2

公开(公告)日：2008-07-08

申请号：US11544464

申请日：2006-10-06

申请人： Roy G. Batruni

发明人： Roy G. Batruni

IPC分类号： H03M1/84

CPC分类号： H03H17/0294 ,  H03F1/32 ,  H03F2200/451 ,  H03H17/0211 ,  H03H17/0273 ,  H03M1/0626 ,  H03M1/1038

摘要： A signal processing system includes a receiving terminal configured to receive a digital signal comprising a plurality of samples associated with a plurality of original sampling times, wherein the original sampling times have a period of T, and a compensation module coupled to the receiving terminal. The compensation module is configured to generate, based on the digital signal, a nominal phase shifted signal having a plurality of nominal phase shifted samples associated with a plurality of phase shifted sampling times, wherein the plurality of phase shifted sampling times correspond to fractional intervals of the original sampling times. The compensation module is further configured to generate a compensated signal based at least in part on the digital signal and the nominal phase shifted signal.

摘要翻译： 信号处理系统包括：接收终端，被配置为接收包括与多个原始采样时间相关联的多个样本的数字信号，其中原始采样时间具有周期T，以及耦合到接收终端的补偿模块。 补偿模块被配置为基于数字信号产生具有与多个相移采样时间相关联的多个标称相移采样的标称相移信号，其中多个相移采样时间对应于 原始采样次数。 补偿模块还被配置为至少部分地基于数字信号和标称相移信号来产生补偿信号。

公开(公告)号：US20070146179A1

公开(公告)日：2007-06-28

申请号：US11544464

申请日：2006-10-06

申请人： Roy Batruni

发明人： Roy Batruni

IPC分类号： H03M1/06

CPC分类号： H03H17/0294 ,  H03F1/32 ,  H03F2200/451 ,  H03H17/0211 ,  H03H17/0273 ,  H03M1/0626 ,  H03M1/1038

摘要： A signal processing method includes receiving a digital signal includes a plurality of samples associated with a plurality of original sampling times, wherein the original sampling times have a period of T; generating, based on the digital signal, a nominal phase shifted signal having a plurality of nominal phase shifted samples associated with a plurality of phase shifted sampling times, wherein the plurality of phase shifted sampling times correspond to fractional intervals of the original sampling times; and generating a compensated signal based at least in part on the digital signal and the nominal phase shifted signal. A signal processing system includes a receiving terminal configured to receive a digital signal comprising a plurality of samples associated with a plurality of original sampling times, wherein the original sampling times have a period of T, and a compensation module coupled to the receiving terminal. The compensation module is configured to generate, based on the digital signal, a nominal phase shifted signal having a plurality of nominal phase shifted samples associated with a plurality of phase shifted sampling times, wherein the plurality of phase shifted sampling times correspond to fractional intervals of the original sampling times. The compensation module is further configured to generate a compensated signal based at least in part on the digital signal and the nominal phase shifted signal.

摘要翻译： 一种信号处理方法，包括接收包括与多个原始采样时间相关联的多个采样的数字信号，其中原始采样时间具有T的周期; 基于所述数字信号产生具有与多个相移采样时间相关联的多个标称相移样本的标称相移信号，其中所述多个相移采样时间对应于所述原始采样时间的分数间隔; 以及至少部分地基于数字信号和标称相移信号产生补偿信号。 信号处理系统包括：接收终端，被配置为接收包括与多个原始采样时间相关联的多个样本的数字信号，其中原始采样时间具有周期T，以及耦合到接收终端的补偿模块。 补偿模块被配置为基于数字信号产生具有与多个相移采样时间相关联的多个标称相移采样的标称相移信号，其中多个相移采样时间对应于 原始采样次数。 补偿模块还被配置为至少部分地基于数字信号和标称相移信号来产生补偿信号。

公开(公告)号：US07170957B2

公开(公告)日：2007-01-30

申请号：US10157157

申请日：2002-05-30

申请人： Christophe Moy ,  Pascal Le Corre

发明人： Christophe Moy ,  Pascal Le Corre

IPC分类号： H03D1/04 ,  H04B1/16 ,  G06F17/00 ,  G06F17/10

CPC分类号： H04L7/0029 ,  H03H17/0273 ,  H04L7/0054 ,  H04L27/2338

摘要： The device (10) for digital demodulation comprises a polyphase filter (14) comprising a set of N distinct elementary digital filters (Hi) and means (16) of selection, for each block of an elementary digital filter (Hi). These latter comprise means (28) for computing an error signal, means (30) for comparing performance indicators for the digital filters arising from the error signals and means (30) for determining the elementary digital filter (Hi) to be implemented in respect of the following block as a function of the result of the comparison.The digital filters (Hi) are ordered. They are chosen according to the order of the filters, as a function of the result of the comparison performed on the performance indicators for the elementary digital filters (Hi) implemented in respect of at least one previous block.Application to a mobile telephone or base station.

摘要翻译： 用于数字解调的装置（10）包括多相滤波器（14），其包括一组N个不同的基本数字滤波器（H SUB）和用于选择的装置（16），用于基本数字滤波器 过滤器（H>。）。 这些后者包括用于计算误差信号的装置（28），用于比较由误差信号产生的数字滤波器的性能指标的装置（30）和用于确定基本数字滤波器的装置（30） >）作为比较结果的函数关于下面的块来实现。 数字滤波器（H> i）被排序。 根据对至少一个先前块实现的基本数字滤波器（H SUB）的性能指标的比较结果的函数，根据滤波器的顺序来选择它们。 。 应用于移动电话或基站。

公开(公告)号：US20060159202A1

公开(公告)日：2006-07-20

申请号：US11300263

申请日：2005-12-13

申请人： Marco Breiling

发明人： Marco Breiling

IPC分类号： H04L27/22

CPC分类号： H04L27/2647 ,  H03D7/00 ,  H03H17/0273

摘要： A frequency converter for a spectral conversion of a start signal having a current frequency to an end signal having a target frequency, wherein the start signal includes an I component having a plurality of I component values and a Q component having a plurality of Q component values, comprises means for selecting a plurality of sub-signals based on the I component or the Q component, wherein a sub-signal, depending on a raster, includes selectable I component values, and wherein another sub-signal, depending on the raster, includes selected Q component values. Further, the frequency converter comprises means for weighting each of the plurality of sub-signals, wherein means for weighting is implemented to weight each of the plurality of sub-signals with one weighting factor each to obtain a plurality of weighting signals. Additionally, the frequency converter comprises means for summing the plurality of weighting signals to obtain the end signal having the target frequency. By such a frequency converter and a corresponding method for a spectral conversion, it is possible, in simply realizable way regarding numerics and circuit engineering, to provide a spectral frequency converter to convert a start signal having a current frequency to an end signal having a target frequency.

摘要翻译： 一种用于将具有当前频率的起始信号的频谱转换为具有目标频率的结束信号的频率转换器，其中所述起始信号包括具有多个I分量值的I分量和具有多个Q分量值的Q分量 包括用于基于I分量或Q分量来选择多个子信号的装置，其中取决于光栅的子信号包括可选择的I分量值，并且其中根据光栅的另一个子信号， 包括所选Q组件值。 此外，频率转换器包括用于对多个子信号中的每一个进行加权的装置，其中实施用于加权的装置，以一个加权因子对每个子信号进行加权，以获得多个加权信号。 此外，频率转换器包括用于对多个加权信号求和以获得具有目标频率的结束信号的装置。 通过这种频率转换器和相应的频谱转换方法，可以以简单可实现的方式进行数学和电路工程，以提供频谱转换器来将具有当前频率的起始信号转换成具有目标的结束信号 频率。

公开(公告)号：US20040246994A1

公开(公告)日：2004-12-09

申请号：US10458389

申请日：2003-06-09

发明人： Michael Steven Munoz ,  Cyrus Asfandiar Dhalla ,  Zoltan Zvi Stroll

IPC分类号： H04J001/00

CPC分类号： H03H17/0266 ,  H03H17/0273

摘要： A filterbank system is provided for reordering subbands of a wideband digital signal. The filterbank system extracts the subbands from a wideband digital input signal into an even channel number group of even channel number subbands and an odd channel number group of odd channel number subbands. The separation of even and odd channel number subbands provides an even channel grouping with guard bands between the even channel number subbands and an odd channel number grouping with guard bands between the odd channel number subbands. The filterbank system then reorders the even channel number subbands and the odd channel number subbands. The reordered subbands are then combined by combining the reordered even channel number subbands and odd channel number subbands into a wideband digital output signal.

摘要翻译： 提供滤波器组系统用于重新排列宽带数字信号的子带。 滤波器组系统从宽带数字输入信号将子带提取成偶数信道数量组的偶数信道数子带和奇数信道数子带的奇数信道数组。 偶数和奇数信道数子带的分离提供偶数信道分组与偶信道数子带之间的保护带和奇数信道号分组与奇数信道数子带之间的保护带。 滤波器组系统然后重新排列偶数频道号子频带和奇数频道号子频带。 然后通过将重新排序的偶数信道数子带和奇数信道数子带组合成宽带数字输出信号来组合重新排序的子带。