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公开(公告)号：US20140195579A1
公开(公告)日：2014-07-10
申请号：US13894321
申请日：2013-05-14
IPC分类号： G06F7/548
CPC分类号： G06F7/548 , G06F7/4818
摘要： An apparatus and method for angle rotation is disclosed to rotate a complex input by the angle θ to produce a rotated complex output signal. A memory storage device generates control information based on a coarse angle θM. A coarse rotation butterfly circuit uses the control information to rotate the complex input signal by the coarse angle θM to produce an intermediate complex number. The control information controls one or more multiplexers and/or adders in the coarse rotation butterfly circuit to rotate the complex input signal. The fine rotation butterfly circuit uses the control information to rotate the intermediate complex number by a fine angle θL to produce the complex output signal. The control information controls one or more multiplexers and/or adders in the fine rotation butterfly circuit to rotate the intermediate complex number.
摘要翻译： 公开了一种用于角度旋转的装置和方法，以使复数输入旋转角度和角度; 以产生旋转的复数输出信号。 存储器存储装置根据粗略角度生成控制信息; M。 粗旋转蝶形电路使用控制信息使复数输入信号以粗角度＆M; M旋转以产生中间复数。 控制信息控制粗略旋转蝶形电路中的一个或多个多路复用器和/或加法器来旋转复合输入信号。 精细旋转蝶形电路使用控制信息将中间复数旋转一个微小的角度，以产生复数输出信号。 控制信息控制微旋转蝶形电路中的一个或多个多路复用器和/或加法器来旋转中间复数。
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公开(公告)号：US20050193047A1
公开(公告)日：2005-09-01
申请号：US11090999
申请日：2005-03-28
申请人： Dengwei Fu , Alan Willson
发明人： Dengwei Fu , Alan Willson
CPC分类号： H04L27/22
摘要： A method of synchronizing symbol timing in a digital device includes the steps of receiving complex data samples of one or more symbols, correlating the data samples with a complex conjugate of a preamble data set, selecting between real and imaginary samples and generating a complex number based on the result. The method then determines an angle in a complex plane that represents symbol synchronization for the digital device. Disclosed embodiments include applications to communications devices, and to carrier recovery in such devices. In such embodiments the resultant angle may represent a carrier phase offset for the device.
摘要翻译： 一种在数字设备中同步符号定时的方法包括以下步骤：接收一个或多个符号的复数数据样本，将数据样本与前导码数据集的复共轭相关联，在实数和虚数采样之间进行选择并生成基于复数的复数 结果。 该方法然后确定表示数字设备的符号同步的复平面中的角度。 公开的实施例包括对通信设备的应用，以及这些设备中的载波恢复。 在这样的实施例中，所得到的角度可以表示装置的载波相位偏移。
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公开(公告)号：US09374067B2
公开(公告)日：2016-06-21
申请号：US14641234
申请日：2015-03-06
申请人： PENTOMICS, INC.
IPC分类号： H03H17/02
CPC分类号： H03H17/0248 , H03H17/06
摘要： A method and system for the design and implementation of an optimally factored interpolated finite impulse response (IFIR) filter is presented. Techniques used to increase the implementation efficiency of the filter include joint sequencing of the filter stages, use of an nested IFIR filter, taming of a stage by relocation of that stage, fusing two or more stages together to form a single stage, and manual manipulation of a post-stage multiplier. IFIR filters using this approach may be realized as low pass filters or high pass filters, and in either analog or digital form.
摘要翻译： 提出了一种用于设计和实现最优因子插值有限脉冲响应（IFIR）滤波器的方法和系统。 用于提高滤波器的实现效率的技术包括滤波器阶段的联合排序，使用嵌套IFIR滤波器，通过重新定位该阶段来驯化阶段，将两个或多个阶段融合在一起以形成单个阶段，以及手动操作 的后期乘数。 使用这种方法的IFIR滤波器可以实现为低通滤波器或高通滤波器，并且以模拟或数字形式实现。
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公开(公告)号：US20020013798A1
公开(公告)日：2002-01-31
申请号：US09912177
申请日：2001-07-24
申请人： Pentomics, Inc.
IPC分类号： G06F017/10
CPC分类号： H03H17/06 , H03H17/0223 , H03H17/0275 , H03H17/0657 , H03H21/0012 , H03H2218/12
摘要： A method, apparatus, article of manufacture, and a memory structure for low power digital processing is disclosed. Tap values are modified by one or more factors to increase computational efficiency and a bias factor used to compensate for changes in the processor output response that result from the modification of the tap values.
摘要翻译： 公开了一种用于低功率数字处理的方法，装置，制品和存储结构。 抽头值由一个或多个因素修改以提高计算效率，并且用于补偿由于抽头值的修改而导致的处理器输出响应的变化的偏置因子。
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公开(公告)号：US5737253A
公开(公告)日：1998-04-07
申请号：US521173
申请日：1995-08-30
CPC分类号： G06F7/5446 , G06F1/0328
摘要： The present invention comprises a direct digital frequency synthesizer. A phase accumulator provides a normalized angle .theta. to a sine/cosine generator that outputs the value of the sine/cosine function at the provided angle. The she/cosine generator in a preferred embodiment comprises a plurality of multiplierless butterfly and carry-save stages in cascade that perform angle rotations on a phasor on the unit circle whose x and y coordinates correspond to cosine and sine values. To calculate the sine and cosine values at a particular angle .theta.=b.sub.1 .theta..sub.1 +b.sub.2 .theta..sub.2 +. . . +b.sub.N .theta..sub.N where b.sub.k .epsilon. {0, 1} are the binary bits and the .theta..sub.k =2.sup.-k are the associated positional weights, each of the butterfly and carry-save stages rotate the phasor by an amount .theta..sub.k =2.sup.-k. The direction of the rotation, clockwise or counter-clockwise, depends upon the value of the binary bits b.sub.k. After undergoing all of the rotations, the phasor has x and y coordinates that approximate the desired cosine and sine values to a specified accuracy. In a preferred embodiment, the datapath of the present invention is multiplierless. The stages for angles where the approximation tan .theta..sub.k =.theta..sub.k is acceptable are multiplierless while for angles where this approximation does not hold, the x and y phasor coordinates are transformed through a multiplexer or a ROM.
摘要翻译： 本发明包括直接数字频率合成器。 相位累加器向正弦/余弦发生器提供归一化角度+ E，ovsθ+ EE，其以所提供的角度输出正弦/余弦函数的值。 在优选实施例中，她/余弦发生器包括级联的多个无乘法器蝴蝶和进位保存级，其在x和y坐标对应于余弦和正弦值的单位圆上的相量上执行角度旋转。 计算特定角度θ= b1θ1 + b 2 + 2的正弦和余弦值。 。 。 + bNθN其中bkε{0,1}是二进制位，θk = 2-k是相关联的位置权重，每个蝶形和进位保存级将相量旋转量θk = 2- k。 顺时针或逆时针旋转的方向取决于二进制位bk的值。 经历了所有旋转之后，相量具有将所需余弦值和正弦值近似为指定精度的x和y坐标。 在优选实施例中，本发明的数据路径是无乘数的。 近似tanθk =θk可接受的角度的阶段是无乘数的，而对于该近似不成立的角度，x和y相量坐标通过多路复用器或ROM进行变换。
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公开(公告)号：US08131793B2
公开(公告)日：2012-03-06
申请号：US11938252
申请日：2007-11-09
申请人： Alan N. Willson, Jr.
发明人： Alan N. Willson, Jr.
IPC分类号： G06F7/38
CPC分类号： G06F7/4818
摘要： An apparatus and method for angle is disclosed to rotate a complex input by the angle θ to produce a rotated complex output signal. A memory storage device generates control information based on a coarse angle θM. A coarse rotation butterfly circuit uses the control information to rotate the complex input signal by the coarse angle θM to produce an intermediate complex number. The control information controls one or more multiplexers and/or adders in the coarse rotation butterfly circuit to information to rotate the complex input signal. The fine rotation butterfly circuit uses the control information to rotate the intermediate complex number by a fine angle θL to produce the complex output signal. The control information controls one or more multiplexers and/or adders in the fine rotation butterfly circuit to rotate the intermediate complex number.
摘要翻译： 公开了一种用于角度的装置和方法，以使复数输入旋转角度和角度; 以产生旋转的复数输出信号。 存储器存储装置根据粗略角度生成控制信息; M。 粗旋转蝶形电路使用控制信息使复数输入信号以粗角度＆M; M旋转以产生中间复数。 控制信息将粗略旋转蝶形电路中的一个或多个多路复用器和/或加法器控制为旋转复数输入信号的信息。 精细旋转蝶形电路使用控制信息将中间复数旋转一个微小的角度，以产生复数输出信号。 控制信息控制微旋转蝶形电路中的一个或多个多路复用器和/或加法器来旋转中间复数。
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7.发明授权公开(公告)号：US07532989B1
公开(公告)日：2009-05-12
申请号：US10778794
申请日：2004-02-13
申请人： Arthur Torosyan
发明人： Arthur Torosyan
CPC分类号： G01R31/31725 , H04L27/36
摘要： The present invention is embodied in a system for the analysis and design of direct digital synthesizers including a windowing engine, and a method that enables the analysis of DDS output spectra in the presence of phase truncation and arbitrary approximations and errors in the implementation of the sine/cosine mapping function (SCMF) without the need to approximate the DDS characteristics.
摘要翻译： 本发明体现在一种用于分析和设计包括开窗引擎的直接数字合成器的系统，以及一种能够在存在相位截断和任意近似的情况下对DDS输出谱进行分析和在正弦执行中出错的方法 /余弦映射函数（SCMF），而不需要近似DDS特性。
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8.发明申请公开(公告)号：US20090075595A1
公开(公告)日：2009-03-19
申请号：US12233422
申请日：2008-09-18
IPC分类号： H04B7/00
CPC分类号： H04L27/0002 , H03M1/661 , H03M1/662
摘要： A method and system for the design and implementation of an inverse-sinc function that can efficiently process signals produced by high-speed systems is presented. An integrated inverse-sinc module accepts multiple data streams that may result from parallel sub-systems and creates multiple outputs that can be interleaved to produce a sequence that has been filtered by an inverse-sinc function. The multiple-input, multiple-output system may be beneficially operated at a low data rate, such as the data rate used by each of the sub-systems.
摘要翻译： 提出了一种用于设计和实现可以有效处理由高速系统产生的信号的反相函数的方法和系统。 集成的反sinc模块接受可能由并行子系统产生的多个数据流，并创建可以进行交织的多个输出，以产生已被反向sinc函数过滤的序列。 多输入多输出系统可以以低数据速率有利地操作，诸如由每个子系统使用的数据速率。
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公开(公告)号：US06874006B1
公开(公告)日：2005-03-29
申请号：US09698249
申请日：2000-10-30
申请人： Dengwei Fu , Alan N. Willson, Jr.
发明人： Dengwei Fu , Alan N. Willson, Jr.
CPC分类号： H04L27/22
摘要： A rectangular-to-polar-converter receives a complex input signal (having X0 and Y0 components) and determines an angle φ that represents the position of the complex signal in the complex plane. The rectangular-to polar-converter determines a coarse angle φ1 and a fine angle φ2, where φ=φ1+φ2. The coarse angle φ1 is obtained using a small arctangent table and a reciprocal table. These tables provide just enough precision such that the remaining fine angle φ2 is small enough to approximately equal its tangent value. Therefore the fine angle φ2 can be obtained without a look-up table, and the fine angle computations are consolidated into a few small multipliers, given a precision requirement. Applications of the rectangular-to-polar converter include symbol and carrier synchronization, including symbol synchronization for bursty transmissions of packet data systems. Other applications include any application requiring the rectangular-to-polar conversion of a complex input signal.
摘要翻译： 矩形到极性转换器接收复数输入信号（具有X0和Y0分量）并且确定表示复平面中的复信号的位置的角度phi。 矩形到极化转换器确定粗角度phi1和精细角度phi2，其中phi = phi1 + phi2。 使用小的反正切表和倒数表获得粗角度phi1。 这些表提供足够的精度，使得剩余的细角度phi2足够小以近似等于其切线值。 因此，在没有查找表的情况下可以获得细角度phi2，并且在精度要求下，将精细角度计算合并到几个小乘数中。 矩形到极化转换器的应用包括符号和载波同步，包括分组数据系统的突发传输的符号同步。 其他应用包括需要复合输入信号的矩形到极化转换的任何应用。
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公开(公告)号：US09268529B2
公开(公告)日：2016-02-23
申请号：US13894321
申请日：2013-05-14
申请人： Alan N. Willson, Jr.
发明人： Alan N. Willson, Jr.
CPC分类号： G06F7/548 , G06F7/4818
摘要： An apparatus and method for angle rotation is disclosed to rotate a complex input by the angle θ to produce a rotated complex output signal. A memory storage device generates control information based on a coarse angle θM. A coarse rotation butterfly circuit uses the control information to rotate the complex input signal by the coarse angle θM to produce an intermediate complex number. The control information controls one or more multiplexers and/or adders in the coarse rotation butterfly circuit to rotate the complex input signal. The fine rotation butterfly circuit uses the control information to rotate the intermediate complex number by a fine angle θL to produce the complex output signal. The control information controls one or more multiplexers and/or adders in the fine rotation butterfly circuit to rotate the intermediate complex number.
摘要翻译： 公开了一种用于角度旋转的装置和方法，以使复数输入旋转角度和角度; 以产生旋转的复数输出信号。 存储器存储装置根据粗略角度生成控制信息; M。 粗旋转蝶形电路使用控制信息使复数输入信号以粗角度＆M; M旋转以产生中间复数。 控制信息控制粗略旋转蝶形电路中的一个或多个多路复用器和/或加法器来旋转复合输入信号。 精细旋转蝶形电路使用控制信息将中间复数旋转一个微小的角度，以产生复数输出信号。 控制信息控制微旋转蝶形电路中的一个或多个多路复用器和/或加法器来旋转中间复数。
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