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91.发明公开Digital radio communication system and primary and secondary station for use in such a system 失效一种数字无线电传输系统，并且在这样的系统主要和次要点使用。
公开(公告)号：EP0576079A1
公开(公告)日：1993-12-29
申请号：EP93201751.0
申请日：1993-06-18
摘要： A digital radio communication system (1) is known, for example based on the DECT standard, in which radio communication of digital speech or data between primary (BS1) and secondary (MS1) stations takes place via duplex FDMA/TDMA connection. Channel allocation therein is dynamic. If necessary because of the receiving conditions, the secondary station (MS1) can initiate a so-called handover by searching for a free channel offering better receiving conditions. In accordance with the invention, this handover is seamless. First digital speech bursts are exchanged via different time slots (ts) during a number of frames (fr), being digital speech data and copy digital speech data. After verification that the copy data is valid, i.e. that communication has been established via a free channel, handover takes place. The digital data and the copy data is stored in a cyclic buffer (SB5) so that a phase shift (d) between the data and the copy data is eliminated. Subsequently, the channel via which the original data was transported is released. In one embodiment a speech pointer (SPP) for reading speech freely progresses along the cyclic buffer (SB5) and a radio pointer (RFP), progressing along the buffer (SB5) and controlling the writing of speech bursts, is adapted during handover to a phase shift (d) between time slots involved in the handover.
摘要翻译： 一种数字无线通信系统（1）是基于DECT标准已知的，例如，在数字语音或主（BS1）之间的数据和次级（MS1）站的哪一个无线电通信经由双工FDMA / TDMA连接发生。 信道分配其中的动态。 如果必要的，因为接收条件的，则次站（MS1）可以通过搜索一个空闲的信道提供更好的接收条件启动所谓的越区切换。 在符合本发明雅舞蹈，这个越区切换是无缝的。 第一数字语音脉冲串的帧数（FR）期间经由不同的时隙（TS）交换的，作为数字语音数据和复制数字语音数据。 验证之后，DASS死了CopyData是有效的，即 没有通信已经通过免费渠道建立，移交发生。 的数字数据和复制数据被存储在环状缓冲液（SB5），以确实的数据和复制数据之间的相移（d）中被消除。 随后，信道，通过该运其原始数据被释放。 在一个实施例中，用于自由地读取语音的语音指针（SPP）沿着所述环状缓冲液（SB5）和无线指针（RFP）的进行，沿缓冲（SB5），并控制语音突发的写入进步，在切换期间被angepasst到 在切换所涉及的时隙之间的相移（d）中。
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92.发明公开Transmission system comprising receiver with improved timing means 失效Übertragungssystemmit einemEmpfängermit verb desserten Taktregenerationsmitteln。
公开(公告)号：EP0558118A2
公开(公告)日：1993-09-01
申请号：EP93200422.9
申请日：1993-02-16
CPC分类号： H04L7/0062 , H03M5/18 , H04L25/49
摘要： A data transmission system comprising a transmitter (2) connected by way of a channel (4) to a receiver (6) in which the data symbols to be transmitted are subdivided into groups and the data symbols from a group are represented each by a different signal element. The transmitted signal then comprises the sum of the various signal elements. An example of such a representation is the quadra-phase code.
For recovering the transmitted symbols from the received signal, this received signal in the case of the quadra-phase code is sampled in the receiver per group of signal elements at a first and a second sampling instant and decisions about the transmitted symbol values are made in response to the values of these samples.
For allowing the sampling to take place at the right instant, the receiver comprises timing means (21) for adjusting the sampling instants in response to an error signal. According to the inventive idea this error signal depends on the correlation between the value of the sample at the first instant and a measure for the expected value of the sample at the second instant.摘要翻译： 一种数据传输系统，包括通过信道（4）连接到接收机（6）的发射机（2），其中要发送的数据符号被分成组，并且来自组的数据符号由不同的 信号元素。 所发送的信号然后包括各种信号元素的总和。 这种表示的一个例子是四相代码。 为了从接收到的信号中恢复发送的符号，在第一和第二采样时刻，在四相位代码的情况下，该接收信号在每个信号元件组中在接收机中被采样，并且对发送的符号值进行判定 响应这些样品的值。 为了允许在正确的时刻进行采样，接收机包括用于响应于误差信号调整采样时刻的定时装置（21）。 根据本发明，该误差信号取决于第一时刻的样品的值与在第二时刻的样品的期望值的测量值之间的相关性。
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公开(公告)号：EP0357121B1
公开(公告)日：1993-07-21
申请号：EP89202087.6
申请日：1989-08-15
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公开(公告)号：EP0304998B1
公开(公告)日：1993-07-07
申请号：EP88201771.8
申请日：1988-08-18
CPC分类号： H04M1/727 , H04M1/72505
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95.发明公开Decision feedback equalisation system with low error propagation 失效Datenübertragungssystemmit verringerter Fehlerfortpflanzung。
公开(公告)号：EP0549019A2
公开(公告)日：1993-06-30
申请号：EP92203762.7
申请日：1992-12-04
发明人： Russell, Mark Alan , Bergmans, Johannes Wilhelmus Maria , Bogers, Antonius Johannes Petrus , Kathmann, Eric
IPC分类号： H04L25/03
CPC分类号： H04L25/4975 , H04L25/03057 , H04L25/03343
摘要： For avoiding error propagation as a result of decision feedback equalization, the data to be transmitted are coded with a coder 2 which has a transfer function substantially inverse to the transfer function of the channel 4. Consequently, instantaneous decisions about the received symbol may be made at the receiver 6 without intersymbol interference causing a disturbance.
If the channel transfer function differs from the transfer function of the precoder 2, intersymbol interference will again occur, so that the symbol error rate will increase.
In order to restrict this increase of the symbol error rate as much as possible, the receiver comprises a cascaded circuit of an adaptive filter 18 which has an inverse transfer function to that of the channel and a decoder 21 which has a inverse transfer function to that of the precoder 2.摘要翻译： 为了避免作为判决反馈均衡的结果的错误传播，要发送的数据用编码器2编码，编码器2具有与信道4的传递函数基本相反的传递函数。因此，可以对接收到的符号进行即时判定 在接收机6处没有造成干扰的符号间干扰。 如果信道传递函数与预编码器2的传递函数不同，则会发生符号间干扰，使得符号错误率将增加。 为了尽可能地限制符号错误率的这种增加，接收机包括自适应滤波器18的级联电路，该自适应滤波器18具有与信道的反向传递函数，以及解码器21，其具有与该信道相反的传递函数 的预编码器2.
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96.发明公开Magnetic resonance imaging method and device for monitoring motion of a part of an object 失效用于监视物体的一部分的运动的磁共振成像方法和装置
公开(公告)号：EP0507392A3
公开(公告)日：1993-06-23
申请号：EP92200885.9
申请日：1992-03-30
CPC分类号： G01R33/56333 , G01R33/5617 , G01R33/5673
摘要： Magnetic resonance imaging methods for myocardial tagging are known for assessment of myocardial motion. In such methods tagging pulse and gradient sequences (tsq) are applied to the heart of an object (4) for acquiring tagged magnetic resonance images of, for example, heart slices from diastole to systole, the sequences being triggered upon detection of the R-wave of an ECG. With these known sequences, such as the so-called SPAMM sequence, it is very difficult, if at all possible, to automatically detect the tagging grid and therefore to evaluate the motion quantitatively. According to the present invention, a magnetic resonance imaging method and device (1) are disclosed which allow for automatic quantitative motion evaluation of a part of an object (4). The pulse and gradient sequences (tsq) are applied in pairs with spatially differing tagging patterns, images corresponding to the pairs being subtracted so as to form a tagged image. The motion is monitored by scanning of the tagging pattern in the tagged image.
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公开(公告)号：EP0305602B1
公开(公告)日：1993-03-17
申请号：EP87201666.2
申请日：1987-09-03
发明人： Chung, Kah-Seng
IPC分类号： H03D7/16
CPC分类号： H03D7/166
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公开(公告)号：EP0523780A3
公开(公告)日：1993-03-03
申请号：EP92202044.1
申请日：1992-07-07
CPC分类号： H04J14/0298 , H04B10/64
摘要： In an optical telecommunication system with a direct-access transmission medium (1), a plurality of terminals (3, 4, 5, 6) may communicate with each other on various optical carriers. In order to make it possible for a third terminal to send a message to the first or second terminal during a connection between a first and a second terminal, the terminals comprise modulation circuits (9) and demodulation circuits (29) for modulating/demodulating data signals on a subcarrier so as to distinguish, for example, in the first terminal between the signals coming from the second and the third terminal respectively.
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99.发明公开
公开(公告)号：EP0528491A2
公开(公告)日：1993-02-24
申请号：EP92202480.7
申请日：1992-08-11
发明人： Rhebergen, Gertjan
摘要： In prior-art telecommunication systems a two-wire line carrying digital duplex traffic is tapped by inserting, at a line interruption, two mutually coupled hybrid circuits which convert the two-wire line to a four-wire connection, a traffic stream in one direction being conveyed by two of the four wires and a traffic stream in the other direction being conveyed by the further two of the four wires. A disadvantage for this is that the line is to be interrupted. In the telecommunication system according to the invention the tapping is performed by way of discrimination means and echo cancelling means coupled thereto. The invention is based on the recognition that the traffic stream having the larger amplitude can be discriminated from the digital duplex traffic by way of the discrimination means and that, subsequently, the other traffic stream can be discriminated from the digital duplex traffic by way of the echo cancelling means which echo cancelling means are supplied with both the digital duplex traffic coming from the line and the traffic stream that has the larger amplitude coming from the discrimination means.
摘要翻译： 在现有技术的电信系统中传送数字双工业务的双线线路通过插入，在线路中断，两个相互耦合哪转换双线线路的四线连接，业务流在一个方向上的混合电路抽头 由两个四条线中的被输送，并在其它方向上的业务流由两个另外的四条线中的被输送。 针对此缺点做了线路中断。 在电信系统中gemäß发明的攻丝执行通过鉴别装置的方式和回波消除装置于此耦合。 本发明是基于这样的认识，确实具有较大振幅的业务流可以从数字双工流量由鉴别装置的方式，并且，随后，其它的业务流可以从数字双工流量来区分通过的方式来区分 回声消除指回波消除装置与这两个数字双工通信从线来来往往的车流也有较大的幅度从鉴别装置来提供。
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100.发明公开ANTENNA DIVERSITY RECEIVING SYSTEM FOR ELIMINATING RECEPTION INTERFERENCE IN MOBILE TELEVISION SIGNAL RECEPTION 失效天线分集接收器，用于接收干扰，在移动电视接收的消除。
公开(公告)号：EP0524184A1
公开(公告)日：1993-01-27
申请号：EP91904513.0
申请日：1991-02-08
CPC分类号： H04N5/44 , H04B7/0811 , H04B7/0814 , H04B7/0871 , H04B7/0874
摘要： Sont décrits un système de réception en diversité de signaux d'antenne pour la réception mobile de signaux de télévision ayant N entrées d'antenne, un processeur en diversité comportant autant d'entrées et relié en aval du système à un récepteur de télévision, le signal vidéo du récepteur de télévision et les signaux de synchronisation de ligne et d'image étant appliqués au processeur en diversité. Ce dernier comporte un circuit de porte temporisé qui est ouvert par les impulsions de synchronisation de ligne pendant l'intervalle de suppression de ligne et fait passer le signal vidéo au circuit d'évaluation de qualité de signal. A cet emplacement, un signal de sortie présentant la qualité de signal du signal vidéo est produit et appliqué au circuit de commande. Dans le cas d'une perturbation d'image imminente, le circuit de commande produit un signal d'adresse de sorte que très rapidement un nouveau signal d'antenne ou une combinaison linéaire dérivée des signaux d'antenne soit appliquée au récepteur de télévision au moyen d'un coupleur d'antenne. Particulièrement avantageux est le fait que pendant l'intervalle de suppression de ligne, la qualité de signal de tous les signaux HF disponibles est testée et le signal HF présentant la meilleure qualité de signal est acheminé au récepteur de télévision pendant l'intervalle de temps restant.
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