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    • 2. 发明申请
    • INTEGRATED DEMODULATOR, FILTER AND DECIMATOR (DFD) FOR A RADIO RECEIVER
    • 无线电接收机的集成式解调器,滤波器和减速器(DFD)
    • WO2012080795A1
    • 2012-06-21
    • PCT/IB2011/002879
    • 2011-11-30
    • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)LAPORTE, Pierre-André
    • LAPORTE, Pierre-André
    • H04B1/00H03D3/00
    • H04B1/0014H03D3/006
    • A superheterodyne receiver includes an A/D converter for converting an IF signal to a stream of samples at a sampling frequency that is four times the IF and a splitter that splits the stream of samples into a first set of even samples and a second set of odd samples. A first quadrature demodulator demodulates just the first set of even samples to produce one of real (I) and imaginary (Q) components of a complex signal at one half of the sampling frequency, and a second, parallel quadrature demodulator demodulates just the second set of odd samples to produce the other of the I and Q components. The demodulated first set is filtered using a first subset of filter coefficients, and the demodulated second set is filtered using a second subset of filter coefficients. The filter outputs correspond to a baseband complex signal. The technology disclosed reduces overall hardware complexity and operating frequency by a factor of two or more.
    • 超外差接收机包括A / D转换器,用于以IF的四倍的采样频率将IF信号转换成采样流;以及分离器,其将样本流分解成第一组偶数样本,第二组 奇数样本。 第一正交解调器仅解调第一组偶数样本,以在采样频率的一半处产生复数信号的实数(I)和虚数(Q)分量之一,第二并联正交解调器仅解调第二组 的奇数样本以产生I和Q分量中的另一个。 使用滤波器系数的第一子集来对解调的第一集合进行滤波,并且使用滤波器系数的第二子集来滤波解调的第二集合。 滤波器输出对应于基带复合信号。 所公开的技术将整体硬件复杂性和操作频率降低了两倍或更多。
    • 3. 发明申请
    • APPARATUS AND METHOD FOR DEMODULATING AN INPUT SIGNAL
    • 用于解调输入信号的装置和方法
    • WO2011109913A1
    • 2011-09-15
    • PCT/CH2010/000066
    • 2010-03-10
    • ZURICH INSTRUMENTS AGHAFIZOVIC, SadikHEER, FlavioKOCH, StefanHAANDBAEK, Niels
    • HAFIZOVIC, SadikHEER, FlavioKOCH, StefanHAANDBAEK, Niels
    • H03D1/00H03D3/00
    • H03D3/006H03D1/22
    • The invention relates to an apparatus (300; 400; 500; 600) for demodulating an input signal (306; 402; 520), comprising a frequency detector (302; 403; 502.1,..., 502. N; 603) for tracking a frequency (f2; fd1,..., fdN) of the input signal (306; 402; 520), an oscillator (304; 410; 505; 605, 606) and a mixer (305; 408; 507; 608, 609), wherein the input signal (306; 402; 520) and an output signal (307; 409) of the oscillator (304; 410; 505; 605, 606) constitute the incoming signals for the mixer (305; 408; 507; 608, 609) and the output signal of the mixer (305; 408; 507; 608, 609) constitutes the demodulated input signal, wherein an arithmetic unit (303; 404; 504; 604) is arranged downstream of the frequency detector (302; 403; 502.1,..., 502. N; 603) and upstream of the oscillator (304; 410; 505; 605, 606), wherein the tracked frequency (f2; fd1,..., fdN) of the input signal (306; 402; 520) and a predefined second frequency (f1; faux1,..., fauxM) constitute the incoming signals of the arithmetic unit (303; 404; 504; 604) and the arithmetic unit (303; 404; 504; 604) is designed such that it computes a control signal (f3; f4; fo1,..., foP) for the oscillator (304; 410; 505; 605, 606) from the tracked frequency (f2; fd1,..., fdN) of the input signal (306; 402; 520) and the predefined second frequency (f1; faux1,..., fauxM) with the output signal (307; 409) of the oscillator (304; 410; 505; 605, 606) depending on the control signal (f3; f4; fo1,..., foP). The invention furthermore relates to a method for demodulating an input signal (306; 402; 520) with such an apparatus (300; 400; 500; 600).
    • 本发明涉及一种用于解调输入信号(306; 402; 520)的装置(300; 400; 500; 600),包括频率检测器(302; 403; 502.1,...,502; N; 603) 跟踪输入信号(306; 402; 520)的频率(f2; fd1,...,fdN),振荡器(304; 410; 505; 605,606)和混频器(305; 408; 507; 608 ,其中所述振荡器(304; 410; 505; 605,606)的所述输入信号(306; 402; 520)和输出信号(307; 409)构成所述混频器(305; 408; 507; 608,609),并且所述混频器(305; 408; 507; 608,609)的输出信号构成所述解调输入信号,其中运算单元(303; 404; 504; 604)被布置在所述频率检测器 (302; 403; 502.1,...,502; N; 603)和振荡器(304; 410; 505; 605,606)的上游,其中跟踪的频率(f2; fd1,...,fdN) 所述输入信号(306; 402; 520)和预定义的第二频率(f1; faux1,...,fauxM)构成所述输入信号 算术单元(303; 404; 504; 604)和算术单元(303; 404; 504; 604)被设计成使得它计算振荡器(304; 410; 505; 605,606)的控制信号(f3; f4; fo1,...,foP) )与输出信号(306; 402; 520)的跟踪频率(f2; fd1,...,fdN)和预定义的第二频率(f1; faux1,...,fauxM) 取决于控制信号(f3; f4; fo1,...,foP)的振荡器(304; 410; 505; 605,606) 本发明还涉及一种用这种装置(300; 400; 500; 600)解调输入信号(306; 402; 520)的方法。
    • 4. 发明申请
    • DIGITAL SIGNAL PROCESSING CIRCUIT AND METHOD COMPRISING BAND SELECTION
    • 数字信号处理电路和包含带选择的方法
    • WO2008149258A2
    • 2008-12-11
    • PCT/IB2008/052079
    • 2008-05-27
    • NXP B.V.JANSSEN, Erwin
    • JANSSEN, Erwin
    • H03D7/00
    • H03D3/006H03H17/06H03H2017/0247H03H2218/04
    • 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 sub-sampler (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.
    • 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 以及当所述第一FIR滤波器(20a,b)被应用于来自所述二次采样器(20a,b)的另外的奇数和偶数样本集合时,来自所述二次采样器(20a,b)的偶数和一组奇数样本集合和第二FIR滤波器 分别应用于偶数和奇数集。 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。
    • 5. 发明申请
    • RECEIVER AND METHOD FOR CONCURRENT RECEIVING OF MULTIPLE CHANNELS
    • 多通道同时接收的接收机和方法
    • WO2004082189A3
    • 2004-12-29
    • PCT/US2004006797
    • 2004-03-05
    • THOMSON LICENSING SAPUGEL MICHAEL ANTHONY
    • PUGEL MICHAEL ANTHONY
    • H03D3/00H04B1/28H04N5/44H04N5/50
    • H04B1/0025H03D3/006H04B1/28H04N5/4401H04N5/50
    • A signal receiving apparatus (100) provides a flexible architecture for single or multiple channel reception capability. According to an exemplary embodiment, the signal receiving apparatus (100) includes a front-end processor (20) and one or more channel recovery elements (40 and/or 60). The front-end processor (20) includes an A/D converter (10), a demultiplexer (12), and one or more filters (16, 18). The A/D converter (10) receives analog RF signals and converts the analog RF signals to digital RF signals. The demultiplexer (12) decimates the digital RF signals to generate decimated RF signals. The one or more filters (16, 18) filter the decimated RF signals to generate filtered RF signals. The one or more channel recovery elements (40 and/or 60) process the filtered RF signals to provide baseband signals corresponding to one or more frequency channels.
    • 信号接收装置(100)为单信道或多信道接收能力提供灵活的架构。 根据示例性实施例,信号接收装置(100)包括前端处理器(20)和一个或多个信道恢复元件(40和/或60)。 前端处理器(20)包括A / D转换器(10),解复用器(12)和一个或多个滤波器(16,18)。 A / D转换器(10)接收模拟RF信号并将模拟RF信号转换成数字RF信号。 解复用器(12)抽取数字RF信号以产生抽取的RF信号。 一个或多个滤波器(16,18)对抽取的RF信号进行滤波以产生经滤波的RF信号。 一个或多个信道恢复元件(40和/或60)处理滤波的RF信号以提供对应于一个或多个频率信道的基带信号。
    • 6. 发明申请
    • INTEGRATED MODULATOR AND DEMODULATOR CONFIGURATION
    • 集成调制器和解调器配置
    • WO2004027980A1
    • 2004-04-01
    • PCT/US2003/029241
    • 2003-09-19
    • INTERSIL AMERICAS INC.
    • WEBSTER, Mark, A.PONTON, Kent, A.CHIUCHIOLO, Paul, J., Jr.
    • H03C1/60
    • H03H17/0275H03C3/40H03D3/006H03H17/0657H03H17/0664H03H2218/04
    • An integrated demodulator and decimator circuit (700, 800) including a selective digital sign inverter (703, 803) and a decimator (705, 805). The sign inverter negates selected digital samples based on Weaver demodulation and outputs demodulated digital samples at a sample rate. The decimator is a symmetric half-band FIR filter, where the demodulated digital samples are sequentially shifted through filter taps (721) at the sample rate. The decimator outputs real output values based on digital samples shifted into alternate taps and imaginary output values based on digital samples shifted into the center tap (26). An integrated modulator and interpolator circuit (217) includes a symmetric half-band FIR filter interpolator (500) and a digital sign inverter (507). The interpolator includes two polyphase filters and a multiplexer (505). A first polyphase filter filters real digital samples and a second filters imaginary digital samples. The multiplexer provides interpolated digital samples at four times the sample rate. The digital sign inverter negates selected digital samples according to Weaver modulation.
    • 一种包括选择性数字符号反相器(703,803)和抽取器(705,805)的集成解调器和抽取器电路(700,800)。 符号逆变器根据Weaver解调器对所选择的数字样本进行取反,并以采样率输出解调数字样本。 抽取器是对称半带FIR滤波器,其中解调的数字样本以采样率顺序地移动通过滤波器抽头(721)。 抽取器基于基于移入中心抽头(26)的数字样本,基于移入交替抽头的数字样本和虚数输出值输出实际输出值。 集成调制器和内插器电路(217)包括对称半带FIR滤波器内插器(500)和数字符号反相器(507)。 内插器包括两个多相滤波器和多路复用器(505)。 第一个多相滤波器滤除实数数字样本和第二个滤波器虚数字样本。 多路复用器提供四倍采样率的内插数字采样。 数字符号逆变器根据Weaver调制器对所选择的数字样本进行否定。
    • 7. 发明申请
    • MULTI-BAND TRANSCEIVER UTILIZING DIRECT CONVERSION RECEIVER AND DIRECT CONVERSION RECEIVER
    • 使用直接转换接收器和直接转换接收器的多带收发器
    • WO0052840A8
    • 2001-05-25
    • PCT/US0005379
    • 2000-03-02
    • CONEXANT SYSTEMS INC
    • ROZENBLIT DMITRIYDOMINO WILLIAM JDAMGAARD MORTENOSKOWSKY MARK
    • H03D3/00H03D7/14H04B1/30H04B1/40
    • H04B1/406H03D3/006H03D7/1408H03D7/1433H03D7/1441H03D7/1458H03D7/165H03D2200/009H04B1/30
    • A multi-band transceiver having a receiver portion and a transmitter portion, wherein the receiver portion includes a direction conversion system for directly downconverting a signal to baseband frequencies. The direct conversion receiver system includes a frequency translator having first and second inputs and an output. The first frequency is preferably an nth order subharmonic of the second frequency, wherein n is an integer greater than 1. A low pass filter is integral with or inherent to the first input and a high pass filter is integral with or inherent to the second input. A direct conversion receiver system is also provided in which a first input signal at a first frequency is applied to a first input port of a multiplier, and a second input signal at a second frequency equal to about 1/n times the first frequency wherein n is an integer, is applied to a second input port of the multiplier. A first filter coupled to the first input port is configured to substantially filter out any leakage at the second frequency which may be present. A second filter is configured to substantially filter out any leakage at the first frequency which may be present. The multiplier is configured to produce a signal at an output port thereof which is derived from the product of the first and second signals.
    • 一种具有接收机部分和发射机部分的多频带收发机,其中所述接收机部分包括用于将信号直接下变频到基带频率的方向转换系统。 直接转换接收机系统包括具有第一和第二输入和输出的频率转换器。 第一频率优选地是第二频率的第n次次谐波,其中n是大于1的整数。低通滤波器与第一输入一体或固有,并且高通滤波器与第二输入集成或固有 。 还提供了一种直接转换接收机系统,其中以第一频率的第一输入信号被施加到乘法器的第一输入端口,第二输入信号以等于第一频率的大约1 / n倍的第二输入信号,其中n 是一个整数,被应用到乘法器的第二个输入端口。 耦合到第一输入端口的第一滤波器被配置为基本上滤除可能存在的第二频率处的任何泄漏。 第二滤波器被配置为基本上滤除可能存在的第一频率处的任何泄漏。 乘法器被配置为在其输出端口处产生从第一和第二信号的乘积导出的信号。
    • 8. 发明申请
    • DIGITAL FM DEMODULATOR
    • 数字FM解调器
    • WO99000893A1
    • 1999-01-07
    • PCT/DE1998/000845
    • 1998-03-24
    • H03D3/00H03H17/04
    • H03D3/006H03D3/007H03H17/04
    • The invention relates to a digital FM demodulator for preparing a frequency modulated signal for the purpose of analysing a signal content, especially for use with radio signals having a DARC codification. Said demodulator comprises at least three shift register elements (2, 3, 4, 5) which each provoke a signal delay corresponding to a basic delay T or a whole number multiple thereof, four pick-up points (A, B, C, D) for which different signal delays n0T; n1T; n2T; n3T of the basic delay (T) are provoked with whole number multiples n0, n1, n2, n3, which are greater or equal to 0, where for said multiples n0
    • 一种数字FM Demolulator在制备用于评估的信号内容的目的的频率调制信号的,特别是用于具有DARC编码的无线电信号是,具有至少三个移位寄存器元件(2,3,4,5)每一个都具有信号延迟到基本延迟 将造成T或其倍数,并用四个抽头(A,B,C,D),其中,不同的信号延迟N0T,N1t,N2T,N3T与N0,N1,N2的整数倍的整数,n3为大于或等于所述基本延迟的0( T)被实现的,其条件N0
    • 10. 发明申请
    • 受信装置及び復調方法
    • 接收装置和解调方法
    • WO2007066551A1
    • 2007-06-14
    • PCT/JP2006/323814
    • 2006-11-29
    • パイオニア株式会社山本 雄治
    • 山本 雄治
    • H04B1/16H04L27/00
    • H04B1/1027H03D3/006H04H20/30H04H40/18H04H2201/18H04L1/0036H04L1/004H04L1/203H04L1/22H04L5/0005H04L27/0002H04L27/2647
    •  アナログ変調とディジタル変調された被変調波を復調し、アナログ変調された被変調波成分を復調している際、受信品質が良好となると、自動的にディジタル変調された被変調波成分の復調処理に切り替えることを目的とする。  IFフィルタ1,2によって、被変調波信号Sinからアナログ変調された被変調波成分とディジタル変調された被変調波成分を抽出し、その抽出成分を周波数シフタ部3と合成部4で、周波数シフトして合成することで合成被変調波信号Shdaaを生成し、アナログディジタル変換器5で合成被変調波データDhdaaに変換する。バンドパスフィルタ6が合成被変調波データDhdaaから、ディジタル変調された被変調波成分に相当するデータDdを抽出して、ディジタル放送復調部8が復調し、バンドパスフィルタ7が合成被変調波データDhdaaから、アナログ変調された被変調波成分に相当するデータDaを抽出して、アナログ放送復調部9が復調する。ディジタル放送復調部8で検出される誤り検出信号ERRに基づいて受信品質判定部10が受信品質の良否を判定し、受信品質が良好のときにはディジタル放送の復調信号MDdを切替部11を介して出力させ、悪化したときにはアナログ放送の復調信号MDaを切替部11を介して出力させる。
    • 对于模拟和数字调制波的解调,当在模拟调制波分量的解调期间接收质量变好时,模拟调制波分量的解调被自动切换到数字调制波分量的解调。 IF滤波器(1,2)从调制波信号(Sin),模拟和数字调制波分量以及移相器部分(3)和组合部分(4)的组合中提取频率偏移并组合提取的分量 以产生组合的调制波信号(Shdaa),然后由模拟 - 数字转换器(5)将其转换成组合的调制波数据(Dhdaa)。 带通滤波器(6)从组合调制波数据(Dhdaa)中提取对应于数字调制波分量的数据(Dd)。 数字广播解调部分(8)解调数据(Dd)。 另一方面,带通滤波器(7)从组合调制波数据(Dhdaa)中提取对应于模拟调制波分量的数据(Da)。 模拟广播解调部分(9)解调数据(Da)。 基于在数字广播解调部分(8)中产生的错误检测信号(ERR),接收质量确定部分(10)确定接收质量是好还是坏。 如果接收质量好,则接收质量确定部分(10)使数字广播解调信号(MDd)经由切换部分(11)输出。 当接收质量变差时,接收质量确定部分(10)使经由切换部分(11)输出模拟广播解调信号(MDa)。