公开(公告)号：US08059772B2

公开(公告)日：2011-11-15

申请号：US12093124

申请日：2006-11-09

申请人： Shousheng He

发明人： Shousheng He

IPC分类号： H04B1/10

CPC分类号： H04L5/06 ,  H03H17/0223 ,  H03H2218/04 ,  H03H2218/08 ,  H04B1/1027 ,  H04L5/26 ,  H04L27/2017

摘要： A filter device and method for suppressing effects of Adjacent-Channel Interference of a received signal in a Frequency-Division-Multiple-Access system by filtering a baseband signal of the received signal. The filter device comprises an interference filter, which is a complex digital Single-Input-Multiple-Output, SIMO, filter that is adapted to simultaneously generate a first signal filtered at an upper-frequency-band and a second signal filtered at a lower-frequency-band, wherein the first signal is separate from the second signal. The filter device also comprises a selector adapted to select one of the signals as the output from the filter device.

摘要翻译： 一种滤波器装置和方法，用于通过对接收信号的基带信号进行滤波来抑制接收信号在频分多址系统中的相邻信道干扰的影响。 滤波器装置包括干扰滤波器，该干扰滤波器是复数数字单输入多输出SIMO滤波器，其适于同时产生在较高频带滤波的第一信号和在较低频带滤波的第二信号， 频带，其中所述第一信号与所述第二信号分离。 滤波器装置还包括适于选择信号之一作为来自滤波器装置的输出的选择器。

公开(公告)号：US20110267130A1

公开(公告)日：2011-11-03

申请号：US12772105

申请日：2010-04-30

申请人： Jerry R. Hinson

发明人： Jerry R. Hinson

IPC分类号： G06G7/28

CPC分类号： H03H17/0283 ,  H03H17/06 ,  H03H2218/04

摘要： A digital filter-decimator-tuner is configured to receive a complex signal input xk and output a complex USB signal yuk and a complex LSB signal ylk. It includes a USB processing path coupled to receive xk and output yuk, the USB processing path including a USB FIR filter configured to receive a portion of the xk signal and output a first USB intermediate filtered signal, a decimator configured to decimate the first USB intermediate filtered signal and output a second USB intermediate signal, a USB tuner configured to receive the second USB intermediate signal and a USB tuning signal and output a third USB intermediate signal, and a USB equalization filter configured to receive the third USB intermediate signal, and output yuk; and a parallel LSB processing path coupled to receive xk and output ylk. The USB and LSB processing paths may be implemented by the same hardware in one embodiment.

摘要翻译： 数字滤波器 - 抽取器 - 调谐器被配置为接收复合信号输入xk并且输出复杂的USB信号yuk和复合LSB信号ylk。 它包括耦合以接收xk和输出yuk的USB处理路径，所述USB处理路径包括被配置为接收所述xk信号的一部分并输出第一USB中间滤波信号的USB FIR滤波器，所述抽取器被配置为抽取所述第一USB中间 滤波信号并输出​​第二USB中间信号，配置成接收第二USB中间信号的USB调谐器和USB调谐信号并输出​​第三USB中间信号，以及配置成接收第三USB中间信号的USB均衡滤波器，并且输出 uk 以及耦合以接收xk和输出ylk的并行LSB处理路径。 在一个实施例中，USB和LSB处理路径可以由相同的硬件来实现。

公开(公告)号：US07978799B2

公开(公告)日：2011-07-12

申请号：US11922042

申请日：2006-06-02

申请人： Osamu Hoshuyama

发明人： Osamu Hoshuyama

IPC分类号： H04B1/10

CPC分类号： H03H21/0012 ,  H03H2218/04

摘要： A complex signal in which one of two signals that have been generated from a single real signal and that have phases that are shifted 90° with respect to each other is a real part and the other signal is an imaginary part is applied as input to an input terminal. A filter unit generates an output signal that is a complex signal by means of a convolution operation of the input signal, and a filter coefficient that is a real signal and supplies this output signal to an output terminal. A coefficient control unit made up from a common unit and separate units updates the filter coefficients such that the value of the envelope of the output signal approaches a target signal.

摘要翻译： 一种复信号，其中已经从单个实信号产生并且具有相对于彼此偏移90°的相位的两个信号中的一个是实部，另一个信号是虚部被施加作为输入 输入端子。 滤波器单元通过输入信号的卷积运算和作为实信号的滤波器系数产生作为复信号的输出信号，并将该输出信号提供给输出端。 由公共单元和单独单元构成的系数控制单元更新滤波器系数，使得输出信号的包络的值接近目标信号。

公开(公告)号：US20100174768A1

公开(公告)日：2010-07-08

申请号：US12600397

申请日：2008-05-27

申请人： Erwin Janssen

发明人： Erwin Janssen

IPC分类号： G06F17/17

CPC分类号： H03D3/006 ,  H03H17/06 ,  H03H2017/0247 ,  H03H2218/04

摘要： A digital signal processing circuit comprises a band selector (14) for selecting at least one sub-band from a frequency spectrum of a digital sampled input signal. The band selector (14) comprises a plurality of processing branches corresponding to respective phases and an adder (28a, 28b) for adding branch signals from the branches. Each branch comprises a subsampler (20a,b) for sub-sampling sample values of the input signal at the phase corresponding to the branch, a filter (24a,b) with a first FIR filter (32, 34), applied alternatingly to sets of even and to sets of odd samples from the subsampler (20a,b) and a second FIR filter (36, 38) applied to further sets of odd and even samples from the subsampler (20a,b) when the first FIR filter is applied to the even and odd sets respectively. Output samples from the first and second FIR filter (24a,b) are combined to form the branch signals of the branch, according to a changing combination pattern that changes cyclically as a function of sample position and depends on a phase for which the branch is used.

摘要翻译： 数字信号处理电路包括用于从数字采样输入信号的频谱中选择至少一个子带的频带选择器（14）。 带选择器（14）包括对应于各个相位的多个处理分支和用于从分支添加分支信号的加法器（28a，28b）。 每个分支包括用于在与分支相对应的相位处对输入信号的采样值进行子采样的子采样器（20a，b），具有第一FIR滤波器（32,34）的滤波器（24a，b），交替地施加以设置 当施加第一FIR滤波器时，来自二次采样器（20a，b）的奇数样本集和第二FIR滤波器（36,38）应用于来自二次采样器（20a，b）的另外的奇数和偶数样本集合 分别是偶数和奇数。 来自第一和第二FIR滤波器（24a，b）的输出样本被组合以形成分支的分支信号，根据作为样本位置的函数循环变化的变化的组合模式，并且取决于分支是 用过的。

公开(公告)号：US20090245429A1

公开(公告)日：2009-10-01

申请号：US12399239

申请日：2009-03-06

申请人： Masanori FURUTA ,  Takafumi Yamaji ,  Takeshi Ueno

发明人： Masanori FURUTA ,  Takafumi Yamaji ,  Takeshi Ueno

IPC分类号： H04L27/06 ,  H04L7/00

CPC分类号： H03H17/0621 ,  H03H17/0664 ,  H03H2218/04 ,  H03H2218/06

摘要： A sample rate converter includes a multiplexer which multiplexes input signals, an interpolator which interpolates a multiplexed output signal to generate a first feedback signal, a multiplier which multiplies the first feedback signal by a coefficient, a subtracter which subtracts the multiplied signal from the multiplexed input signal, an adder which adds the residual signal and a second feedback signal to sequentially generate integrated signals corresponding to the input signals, respectively, a register circuit configured to individually hold integrated signals, a multiplexer which multiplexes the integrated signals from the register circuit to generate the second feedback signal, a multiplexer which multiplexes the integrated signals from the register circuit to generate a decimation target signal, a decimator which subjects the decimation target signal to decimation to generate the multiplexed output signal, and a discrimination circuit configured to discriminate the multiplexed output signal to generate output signals.

摘要翻译： 采样率转换器包括多路复用输入信号的多路复用器，内插多路复用输出信号以产生第一反馈信号的内插器，将第一反馈信号乘以系数的乘法器，从多路复用输入中减去相乘的信号的减法器 信号，加法器，其分别将残留信号和第二反馈信号分别顺序地产生与输入信号相对应的积分信号;配置为单独保持积分信号的寄存器电路;复用器，其将来自寄存器电路的积分信号多路复用以产生 第二反馈信号，多路复用器，其对来自寄存器电路的积分信号进行多路复用以产生抽取目标信号;抽取目标信号抽取产生复用输出信号的抽取器;以及鉴别电路， 输出信号产生输出信号。

公开(公告)号：US20070179781A1

公开(公告)日：2007-08-02

申请号：US11469790

申请日：2006-09-01

申请人： Lars Villemoes

发明人： Lars Villemoes

IPC分类号： G10L19/14

CPC分类号： G10L19/02 ,  G10L19/0204 ,  H03H17/0266 ,  H03H17/0294 ,  H03H2218/04

摘要： A filter apparatus for filtering a time domain input signal to obtain a time domain output signal, which is a representation of the time domain input signal filtered using a filter characteristic having an non-uniform amplitude/frequency characteristic, comprises a complex analysis filter bank for generating a plurality of complex subband signals from the time domain input signals, a plurality of intermediate filters, wherein at least one of the intermediate filters of the plurality of the intermediate filters has a non-uniform amplitude/frequency characteristic, wherein the plurality of intermediate filters have a shorter impulse response compared to an impulse response of a filter having the filter characteristic, and wherein the non-uniform amplitude/frequency characteristics of the plurality of intermediate filters together represent the non-uniform filter characteristic, and a complex synthesis filter bank for synthesizing the output of the intermediate filters to obtain the time domain output signal.

摘要翻译： 一种用于对时域输入信号进行滤波以获得时域输出信号的滤波器装置，其是使用具有不均匀幅度/频率特性的滤波器特性滤波的时域输入信号的表示，包括复分析滤波器组，用于 从所述时域输入信号产生多个复数子带信号，多个中间滤波器，其中所述多个中间滤波器中的至少一个中间滤波器具有不均匀的幅度/频率特性，其中所述多个中间滤波器 与具有滤波器特性的滤波器的脉冲响应相比，滤波器具有更短的脉冲响应，并且其中多个中间滤波器的非均匀幅度/频率特性一起表示非均匀滤波器特性，并且复合成滤波器组 用于合成中间滤波器的输出以获得时间 域输出信号。

公开(公告)号：US20070118583A1

公开(公告)日：2007-05-24

申请号：US11603047

申请日：2006-11-22

申请人： Hiroyuki Nagasaka

发明人： Hiroyuki Nagasaka

IPC分类号： G06F17/10

CPC分类号： H04L27/36 ,  H03H17/06 ,  H03H2218/04 ,  H04L27/38

摘要： A radio communication system, method, and apparatus using a complex coefficient transversal filter which removes an image are provided. Accordingly, it is possible to improve an image suppression ratio over a wide band by applying the complex coefficient transversal filter which removes an image by using a phase delay of real and imaginary signals to a multi-band, wide-band portable radio communication system. In addition, it is possible to reduce a circuit's size and power consumption.

摘要翻译： 提供了使用去除图像的复数系数横向滤波器的无线电通信系统，方法和装置。 因此，通过应用通过使用实信号和虚信号的相位延迟去除图像的复数系数横向滤波器，可以通过应用于多频带宽带便携式无线电通信系统来提高宽频带上的图像抑制比。 此外，可以减少电路的尺寸和功耗。

公开(公告)号：US20070050439A1

公开(公告)日：2007-03-01

申请号：US11498607

申请日：2006-08-02

申请人： Mohamed Elfataoui ,  Gagan Mirchandani

发明人： Mohamed Elfataoui ,  Gagan Mirchandani

IPC分类号： G06F17/10

CPC分类号： H03H17/06 ,  H03H2017/0072 ,  H03H2218/04

摘要： An electrical signal filter for processing a discrete-time real signal having a length N. In one embodiment, the filter comprising a delay line having N taps and a corresponding respective N filter coefficients. Values for the filter coefficients are determined by first shifting an impulse function of length N by a fraction of N so as to obtain a shifted impulse function. An analytic-signal-generating method is then applied to the impulse function so as to output the filter coefficient values. The values are then assigned to the N taps to complete the filter.

摘要翻译： 一种用于处理具有长度N的离散时间实信号的电信号滤波器。在一个实施例中，滤波器包括具有N个抽头和相应的相应的N个滤波器系数的延迟线。 通过首先将长度N的脉冲函数移位N的分数来确定滤波器系数的值，以获得移位的脉冲函数。 然后将分析信号生成方法应用于脉冲函数，以便输出滤波器系数值。 然后将值分配给N个抽头以完成过滤器。

公开(公告)号：US07161979B2

公开(公告)日：2007-01-09

申请号：US09863487

申请日：2001-05-23

申请人： Jens Wildhagen

发明人： Jens Wildhagen

IPC分类号： H04L7/30 ,  H04L27/20

CPC分类号： H03H17/0292 ,  H03H17/0277 ,  H03H2218/04

摘要： A polyphase filter of order x·N that builds N allpass filters of order x·N has a structure of an allpass filter of order x comprising delay elements with a delay of 1 and at least one multiplier, wherein all delay elements with a delay of 1 are replaced by delay elements with a delay of N and the sampling rate of fS′=fs/N with fs being the sampling rate of the input signal. Preferably the multiplier included in the structure of the allpass filter of order x comprises N-time multiplex multiplication coefficients that are used in a predetermined order.

摘要翻译： 构建阶数为xN的N个全通滤波器的阶数xN的多相滤波器具有包括延迟为1的延迟元件和至少一个乘法器的阶数x的全通滤波器的结构，其中具有延迟1的所有延迟元件被替换为 具有延迟N的延迟元件和fS'= fs / N的采样率，fs是输入信号的采样率。 优选地，包括在阶数x的全通滤波器的结构中的乘法器包括以预定顺序使用的N次多路复用乘法系数。

公开(公告)号：US06429797B1

公开(公告)日：2002-08-06

申请号：US09899610

申请日：2001-07-05

申请人： Miaochen Wu

发明人： Miaochen Wu

IPC分类号： H03M300

CPC分类号： H03H17/0621 ,  H03H2218/04

摘要： A bandpass delta-sigma modulator converts a signal of a nominal frequency to an oversampled digital signal. Digital decimation filter decimates the signal by multiplying the signal by first and second modulating signals. The modulating signals are selected to have a frequency which can produce a baseband signal with a nominal frequency of &pgr;*/3. By using an oversampling rate of 6 times the carrier frequency signal rate, the modulation signal of a frequency &pgr;*/3 produces a real and imaginary signal. The real and imaginary signal can be filtered in first and second filtering decimation circuits reducing the number of signal processing paths for the signal. The decimated signal is further filtered and decimated using conventional digital filtering techniques.

摘要翻译： 带通Δ-Σ调制器将标称频率的信号转换为过采样的数字信号。 数字抽取滤波器通过将信号乘以第一和第二调制信号来抽取信号。 调制信号被选择为具有可产生标称频率为pi * / 3的基带信号的频率。 通过使用载波频率信号速率的6倍的过采样率，频率pi * / 3的调制信号产生实信号和虚信号。 可以在第一和第二滤波抽取电路中对实信号和虚信号进行滤波，从而减少信号的信号处理路径的数量。 使用常规的数字滤波技术进一步对抽取的信号进行滤波和抽取。