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公开(公告)号：US3599103A
公开(公告)日：1971-08-10
申请号：US3599103D
申请日：1968-07-05
Applicant: IBM
Inventor： NUSSBAUMER HENRI J , PARIS ETIENNE E
CPC classification number: H04L7/0062 , H04L7/00 , H04L7/0066 , H04L7/027
Abstract: In a transmission system using a signal-phase shift to encode data, the clock for sampling of the signal for data recovery is maintained in phase with the transmitter clock by a detector which indicates the signal positions having the same voltage magnitudes at positions 90* apart in the signal cycle. The sampling clock is controlled to sample the signal at the indicated points thereby enabling other devices to translate the transmitted data.
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公开(公告)号：US3914588A
公开(公告)日：1975-10-21
申请号：US52920574
申请日：1974-12-03
Applicant: IBM
Inventor： NUSSBAUMER HENRI J
CPC classification number: H03H17/0405
Abstract: A transversal type of digital filter is disclosed which uses substantially less hardware than previously known types. Conventional multiplying devices are eliminated by use of a read only memory containing a table of squares and addressed both by weighted value samples of the input signal and by values of the input signal. The weighted values are accumulated and corrected by the use of the second squared values addressed by the value of the signal sample to generate a sample of a filtered output signal.
Abstract translation: 公开了一种横向型数字滤波器，其使用比先前已知类型更少的硬件。 通过使用包含平方和仅由输入信号的加权值样本和输入信号的值寻址的只读存储器来消除常规乘法器件。 通过使用由信号样本的值寻址的第二平方值来累加和校正加权值，以产生经滤波的输出信号的采样。
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公开(公告)号：US3906218A
公开(公告)日：1975-09-16
申请号：US52917074
申请日：1974-12-03
Applicant: IBM
Inventor： NUSSBAUMER HENRI J
CPC classification number: H03H17/0225
Abstract: A redesigned digital filter is disclosed which uses fewer of the costly multiplier components than conventional digital filters. Samples of the input signals are processed alternately using a multiplier common to two successive samples and a correction term is generated using successive pairs of input samples. The generation of the correction term requires fewer than one-half of the multiplier circuits used in a conventional filter so that the overall circuit saves about one-fourth of the multipliers usually needed.
Abstract translation: 公开了一种重新设计的数字滤波器，其使用比常规数字滤波器更少的昂贵的乘法器组件。 输入信号的样本使用两个连续样本共同的乘法交替地进行处理，并且使用连续的输入采样对来生成校正项。 校正项的产生需要少于常规滤波器中使用的乘法器电路的一半，使得总电路节省通常需要的乘法器的大约四分之一。
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公开(公告)号：US3619501A
公开(公告)日：1971-11-09
申请号：US3619501D
申请日：1970-06-18
Applicant: IBM
Inventor： NUSSBAUMER HENRI J
IPC: H04L27/20 , H04L25/48 , H04L25/497
CPC classification number: H04L25/497
Abstract: A multiphase modulated transmission can be obtained with three data sets X, Y, and Z such that data elements of the set Y+Z drive two phase channels and data elements from the set Y1+Z1, derived from the three sets X, Y, Z and selected according to a predetermined logical function, drive two other phase channels. By adjusting the weighting of algebraic adders terminating corresponding channel pairs, multiphases up to eight can be approximated.
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公开(公告)号：DE3069498D1
公开(公告)日：1984-11-29
申请号：DE3069498
申请日：1980-07-01
Applicant: IBM
Inventor： NUSSBAUMER HENRI J
IPC: G06F17/14 , G06F15/332
Abstract: An apparatus for computing the two-dimensional discrete Fourier transform (DFT) of an image comprised of NxN samples. The samples within each row are respectively multiplied by W-n1, n1=0, 1, . . . , N-1 and stored in a memory 17. A device 20 derives therefrom N polynomials of N terms by means of a polynomial transform. The terms of each of these polynomials are multiplied by Wn1 and a device 28 computes the one-dimensional DFT thereof, thereby providing the N2 terms of the transform of said image.
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Patent Agency Ranking
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公开(公告)号：CA984472A
公开(公告)日：1976-02-24
申请号：CA167865
申请日：1973-03-28
Applicant: IBM
Inventor： LAUTIER ALEX , MADDENS FRANCIS P , NUSSBAUMER HENRI J , PIERRET JEAN M
Abstract: A self-adjustable equalizer for a phase modulation communication system in which the equalizer output signal s is sampled at the modulation rate and weighted by a factor proportional to envelope amplitude distortion dR/R, R being the envelope amplitude at given instants and the product sdR/R being the adjustment control signal. In the preferred embodiment the product of the sign of s and the sign of dR serves as the control or error signal. One implementation frequency translates the equalizer output signal and compares the amplitude of the translated signal with a reference at given instants to determine the sign of dR which is eventually multiplied by the sign of s.
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公开(公告)号：CA889488A
公开(公告)日：1971-12-28
申请号：CA889488D
Applicant: IBM
Inventor： NUSSBAUMER HENRI J , PARIS ETIENNE E
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公开(公告)号：DE2324691A1
公开(公告)日：1973-12-20
申请号：DE2324691
申请日：1973-05-16
Applicant: IBM
Inventor： NUSSBAUMER HENRI J
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公开(公告)号：CA889481A
公开(公告)日：1971-12-28
申请号：CA889481D
Applicant: IBM
Inventor： LAUTIER ALEX H , NUSSBAUMER HENRI J , PIERRET JEAN M
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