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41. 发明公开

EP0847559A4 METHODS AND SYSTEMS FOR DESIGNING AND MAKING SIGNAL-PROCESSOR CIRCUITS WITH INTERNAL COMPANDING, AND THE RESULTING CIRCUITS 失效
标题翻译：方法和系统的设计与内部控制信号处理器的制造及相应扩CIRCUITS
公开(公告)号：EP0847559A4
公开(公告)日：1998-12-23
申请号：EP96932161
申请日：1996-08-30
申请人： UNIV COLUMBIA
发明人： TSIVIDIS YANNIS
IPC分类号： G10L21/02 , G06F17/00 , H03H19/00 , H04B1/66 , H04B3/06 , G06F17/10 , G06G7/02
CPC分类号： H03H11/04
摘要： Electrical filter or signal processor circuits are provided with internal companding for reduced sensitivity to noise while input-output response is as conventionally specified. In the continuous-time case, for a specified circuit described by state equations with a state vector x(t), state equations are derived of an equivalent companding circuit having a state vector w(t)=G(t) x(t), where G(t) is a suitably chosen matrix (12). G(t) may be chosen for instantaneous or syllabic companding of the state vector. A corresponding technique applies to discrete-time circuits.

42. 发明授权

EP0524758B1 Distortion compensation for analog optical systems 失效
标题翻译：用于模拟的光学系统的失真补偿
公开(公告)号：EP0524758B1
公开(公告)日：1998-10-28
申请号：EP92306430.7
申请日：1992-07-14
申请人： AT&T Corp.
发明人： Bergmann, Ernest Eisenhardt , Kuo, Chien-Yu
IPC分类号： H04B10/18 , H04B3/06
CPC分类号： H04B10/25133 , H04B2210/252

43. 发明公开

EP0728382A4 PIPELINED VITERBI RECORDER 失效
标题翻译： VITERBI PIPELINEDEKODER
公开(公告)号：EP0728382A4
公开(公告)日：1998-02-25
申请号：EP94932131
申请日：1994-10-31
申请人： AMPEX
发明人： YEH NAN-HSING , OLSON CHARLES R
IPC分类号： G06F11/10 , G11B20/10 , G11B20/18 , H03M13/23 , H03M13/41 , H04B3/06 , H03M13/12
CPC分类号： H03M13/6343 , H03M13/41
摘要： A pipelined Viterbi decoder (100) includes a plurality of circuit stages and a synchronous clocking arrangement for controlling the operations of the circuits within each stage. Specifically, an input stage (110) converts multi-level input signals into streams of even and odd digital data samples. A parellel-precomputation stage (200) adaptively establishes a threshold range for each sample, while a sequence detection stage (300) designates one of the multiple levels for that sample and then determines the validity of that designation. Validity is determined in accordance with the sequence property of alternate samples in multi-level coding. Violations of the sequence property are corrected by a sequence correction stage (400) so that valid, coded data and clock signals are provided at the outputs of the decoder.

44. 发明公开

EP0750405A3 Cable loss equalization system used in wireless communication equipment 失效
标题翻译： Kabeldämpfungsentzerrereinrichtung用于在无线电通信系统中使用
公开(公告)号：EP0750405A3
公开(公告)日：1997-07-30
申请号：EP96109997.5
申请日：1996-06-20
申请人： NEC CORPORATION
发明人： Arai, Masami , Iwasaki, Hiroki
IPC分类号： H04B3/06
CPC分类号： H04B3/04
摘要： In a wireless communication apparatus arranged by an indoor unit, an outdoor unit, and a cable used to connect the indoor unit with the outdoor unit, a gain of an amplifier is automatically set. This amplifier amplifies a lowered level of a signal caused by a cable loss. To perform such an automatic gain setting operation, a cable loss equalization system is used in this wireless communication apparatus. The cable loss equalization system compensates for a reduction in a level of a main signal caused by the cable. The indoor unit comprises: an amplifier for amplifying at least one of a main transmit signal and a main receive signal; a first power source for supplying a first power source voltage to the indoor unit and a second power source of the outdoor unit; transmitting means for transmitting the first power source voltage via the cable to the outdoor unit; receiving means for receiving a second power source voltage supplied to the second power source of the outdoor unit from this outdoor unit; and a first control unit for measuring a voltage difference between the first power source voltage and the second power source voltage to thereby perform a gain setting operation of the amplifier.

45. 发明公开

EP0684706A4 REPLICA PRODUCING ADAPTIVE DEMODULATING METHOD AND DEMODULATOR USING THE SAME. 失效
标题翻译： REPLIKHERSTELLENDES自适应解调这种用法SANTANDER解调器。
公开(公告)号：EP0684706A4
公开(公告)日：1996-11-20
申请号：EP94931682
申请日：1994-11-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI HIROSHI
IPC分类号： H04B3/23 , H04L25/03 , H04B7/005 , H04B3/06 , H04L27/01
CPC分类号： H04B3/23 , H04L25/03031
摘要： In order that a coefficient vector does not diverge with respect to even a modulated wave candidate in which the same codes continue, an error vector Em(i), which is computed in an error computing element (36) on the basis of a difference between a vector X(i) having elements comprising N input signals x(i) at continuous points in time and a vector Ym(i) of N replica signals ym(i) from a transversal filter (34), and the cube of a norm thereof is inputted into a maximum likelihood series estimation element (31), in which the signals are estimated. A code series candiate {am} is outputted, and a modulated wave candidate sm corresponding thereto is made, which is subjected to inner product computation with a coefficient vector Wm(i-1), which corresponds to each condition in the estimation element (31), in the filter (34) to produce ym(i). The Wm (i-1) in each condition is altered to Wm(i) by an inner product vector of inverse matrix produced from sm corresponding to transition of condition selected in the estimation element (31), and Em(i).

46. 发明授权

EP0456242B1 Automatic equalizer and semiconductor integrated circuit containing such an equalizer 失效
标题翻译：自动均衡器和包含这样的均衡器的半导体集成电路。
公开(公告)号：EP0456242B1
公开(公告)日：1995-08-23
申请号：EP91107546.3
申请日：1991-05-08
申请人： HITACHI, LTD.
发明人： Hara, Hirotaka , Kokubo, Masaru , Suzuki, Toshiro
IPC分类号： H04B3/06 , H03H15/00
CPC分类号： H04L25/03 , H03H21/0012

47. 发明公开

EP0532717A4 MULTIMEDIA HIGH SPEED NETWORK 失效
标题翻译：多媒体高速网络
公开(公告)号：EP0532717A4
公开(公告)日：1995-01-18
申请号：EP92902516
申请日：1991-05-28
申请人： CHIPCOM CORP , LINDE YOSEPH , SAUSSY GORDON , SNYDER ROBERT , LEE JACK W , BUDIN DAN
发明人： LINDE YOSEPH , GORDON SAUSSY , SNYDER ROBERT , LEE JACK W , BUDIN DAN
IPC分类号： H03H7/01 , H03H7/42 , H04B3/06 , H04B3/14 , H04B10/00 , H04B10/22 , H04L1/22 , H04L25/02 , H04L12/00
CPC分类号： H04B3/06 , Y10S370/906
摘要： A system is provided implementing an extremely high speed link allowing selection of either twisted pair (or like media) and fiber media in a single local area network to provide a high speed multimedia local area network. A high speed transmission link for twisted pair, coaxial cable media or the like is provided including a transmitter with a conversion device for receiving fiber optic data interface signals intended to drive a fiber optic data interface and for converting said fiber optic data interface signals into high speed transmission link signals of a form suitable to drive a shielded twisted pair medium. A receiver is provided including reconversion means for regenerating the signal received from the shielded twisted pair medium back to an adequate signal level. The transmitter conversion means includes a buffer cooperating with an equalizer and a filter for forming the high speed transmission link signal. The equalizer provides frequency domain compensation for the characteristics of the shielded twisted pair medium. The filter rejects signals outside a band of data signaling. The receiver reconversion means includes a filter connected to said twisted pair medium to reject signals outside a band of data signaling, a buffer for regenerating the signal received from the shielded twisted pair and filtration by said filter and regenerating the signal back to an adequate signal level and a low frequency restoration circuit which employs a decision feedback technique for the compensation of the media coupling circuit's low frequency response.

48. 发明公开

EP0453201A1 Control for adaptive equalizer 有权转让
标题翻译： Steuern eines适应了Entzerrers。
公开(公告)号：EP0453201A1
公开(公告)日：1991-10-23
申请号：EP91303284.3
申请日：1991-04-12
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Uesugi, Mitsuru
IPC分类号： H04B3/06 , H04L25/03
CPC分类号： H04L25/03038 , H03H21/0012
摘要： In a digital mobile communication system, a plurality delay elements (1 to 4) sequentially receive and delay data and a plurality of amplifiers (5 to 9) receive the data from the respective taps of the delay elements and weight them. An adder (10) adds the weighted signals from the amplifiers and a discriminator (11) provides a reference signal presumed based upon the added signal from the adder. An operation and updating device (13a, 14) operates the gain of at least one of the amplifiers by a sequential LMS method and updates the gain of the amplifier each time when.a data is inputted into the delay elements. As a result of this, a digital mobile communication system having a high transmission rate using the LMS method can be provided.
摘要翻译：在数字移动通信系统中，多个延迟元件（1至4）顺序接收和延迟数据，多个放大器（5至9）从延迟元件的各个抽头接收数据并对其进行加权。加法器（10）将来自放大器的加权信号相加，并且鉴别器（11）提供基于来自加法器的相加信号推定的参考信号。操作和更新装置（13a，14）通过顺序LMS方法来操作至少一个放大器的增益，并且每当数据被输入到延迟元件中时，更新放大器的增益。作为其结果，可以提供使用LMS方法具有高传输速率的数字移动通信系统。

49. 发明公开

EP0235300A1 RADIO DATA TRANSMISSION SYSTEM 失效
标题翻译：无线数据传输系统。
公开(公告)号：EP0235300A1
公开(公告)日：1987-09-09
申请号：EP86905393.4
申请日：1986-08-27
申请人： FUJITSU LIMITED
发明人： SAKANE, Toshiaki 603, 2-5-5, Shimotakaido , TAKENAKA, Sadao 411, 1879, Shinyoshidamachi , MINOWA, Morihiko 620, Kanamori , AONO, Yoshihito 607, 1-16-15, Asahimachi , DAIDO, Yoshimasa 2-17-203, Wakabadai
IPC分类号： H04B3/06 , H04B7/005 , H04L27/00
CPC分类号： H04B7/005 , H04L25/03038
摘要： in a mode switching control for controlling the tap weighing of a transversal automatic equalizer in a radio data transmission system using multivalued amplitude modulation, the improvement wherein a bit error rat (BER) is found by using pseudo-error pulses, and a threshold value (BER 1) for switching from the normal mode to the reset mode is set to be different from a threshold value (BER 2) for switching from the reset mode to the normal mode, so that the mode switching control can be effected finely and stably with a simple circuit.

50. 发明公开

EP0100540A2 Schaltungsanordnung zur Gewinnung des Regelkriteriums für die Einstellung adaptiver Entzerrer bei digitaler Datenübertragung 有权
标题翻译：电路，其用于提取所述控制准则用于设定自适应均衡器的数字数据传输。
公开(公告)号：EP0100540A2
公开(公告)日：1984-02-15
申请号：EP83107513.0
申请日：1983-07-29
申请人： SIEMENS AKTIENGESELLSCHAFT
发明人： Müller, Eugen Dr. , Sontheim, Hans Ing.grad. , Stummer, Baldur Dipl.-Ing.
IPC分类号： H04B3/06 , H04L25/04
CPC分类号： H04L25/03019
摘要： Die Erfindung betrifft eine Schaltungsanordnung zur Gewinnung des Regelkriteriums für die Einstellung adaptiver Entzerrer bei digitaler Datenübertragung, bestehend aus einem regelbaren Entzerrer.
Aufgabe der Erfindung ist es, einfache Schaltungsmöglichkeiten anzugeben, die ein Regelkriterium liefern, das gegenüber kurzzeitigen Störimpulsen verhältnismäßig unempfindlich ist und mit vertretbarem Schaltungsaufwand realisiert werden kann.
Diese Aufgabe wird erfindungsgemäß durch eine Schaltungsanordnung gelöst, bei der dem regelbaren Entzerrer (2) der Entscheider nachfolgt, anschließend ein erster Integrator (4) geschaltet ist, dem eine Differenz-Schaltung (5) nachfolgt, die auch von einem Sollwertgeber (6) gespeist ist, und der Differenz-Schaltung (5) ein zweiter Integrator (7) folgt, dessen Ausgangssignal die Stellgröße für den regelbaren Entzerrer (2) bildet. Die Regelung erfolgt so, daß das mittlere Tastverhältnis am Ausgang des Entscheiders auf einen vorzugebenden Sollwert geregelt wird.
摘要翻译： 1.用于获取所述调节标准用于数字数据传输的自适应均衡器的调整，包括边条表均衡器（2），其特征在于没有电路装置被构造检查做的边条表均衡器（2）通过阈值随后的电路装置判定电路（3），afterwhich第一积分器（4），其在其输出端连接的所有其通过差分电路（5），所有这些被如此通过的理论值发生器（6），提供跟踪和所有连接到第二积分器（7），其输出信号形成所述控制变量的调节表均衡器（2），调节发生在寻求方式那样在阈值判定电路的输出处的平均脉冲占空因数调节到一个预定的理论值。

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