-
公开(公告)号：EP0099398A1
公开(公告)日：1984-02-01
申请号：EP83900599.0
申请日：1983-01-13
发明人： STEGENS, Ronald E.
IPC分类号： H01P3
CPC分类号： H01P3/003
摘要： Petite ligne de transmission de micro-ondes de guides d'ondes coplanaires à très faible impédance. Une section de ligne de transmission de guides d'ondes coplanaires composites composée d'une pluralité de doigts entrelacés (14, 1; 21, 23) est couplée entre des sections d'entrée et de sortie de la ligne de transmission. Des doigts entrelacés alternés sont connectés à un conducteur principal (12) des sections d'entrée et de sortie de la ligne de transmission et à une couche (11) métallique horizontale de base. La section composite de la ligne de transmission peut être connectée aux sections d'entrée et de sortie de la ligne de transmission soit en un arrangement en cascade soit en un arrangement de dérivation. Des impédances caractéristiques composites de moins de 2 ohms sont obtenues.
-
公开(公告)号：EP0016783B1
公开(公告)日：1983-01-26
申请号：EP79900682.0
申请日：1979-06-11
IPC分类号： H04B11/00
CPC分类号： H04B7/2125 , H04L7/042
摘要： A surface acoustic wave device is used as a unique word detector and coherent demodulator for a digital code differential phase-shift signal. The device improves code word detection by providing a coherent reference with a correlation gain of 10 log M dB. M is the additional number of fingers introduced into the surface acoustic wave device, which determine the phase of the unique word. To achieve this result with higher reliability and higher correlation coefficient, use is made also of a few bits of the clock recovery which precede the unique word in a preamble as used in Time Division Multiple Access (TDMA) systems. The device requires two interdigital output transducers, one (23) of which provides maximum output in response to surface acoustic waves corresponding to a preassigned pattern of the unique word, such as a sequence of all zeros combined with a partial sequence of the clock recovery bits. The outputs of the two interdigital output transducers are maximized at the same instant to detect the auto-correlation peak of the unique word with performance equivalent to coherent demodulation. Also, clock and data are recovered in the second set of interdigital transducers.
-
53.发明公开Digital adaptive finite impulse response filter with large number of coefficients 失效具有大量系数的数字自适应有限冲突响应滤波器
公开(公告)号：EP0056546A3
公开(公告)日：1982-08-11
申请号：EP81402035
申请日：1981-12-21
发明人： Horna, Otakar A.
IPC分类号： H03H21/00
CPC分类号： H03H21/0012
摘要： A digital adaptive finite impulse response (AFIR) filter having a large number of coefficients is composed of two or more separate filter units. The first filter unit computes response samples h o - h n+1 in response to input signal samples to provide a partial estimated response during each sampling period. After the signal samples arefully processed by the first unit, they are transferred to a second filter unit which produces response samples h n+2 - h p±1 in response thereto to provide a second partial response. The sum of the two partial responses is computed to provide the total estimated system response. The two independent filter units thus act simultaneously to provide twice as many coefficients as prior art AFIR filters in the same amount of time.
摘要翻译： 具有大量系数的数字自适应有限脉冲响应（AFIR）滤波器由两个或多个单独的滤波器单元组成。 第一滤波器单元响应于输入信号采样来计算响应样本ho-Hn + 1，以在每个采样周期期间提供部分估计的响应。 在信号样本被第一单元完全处理之后，它们被传送到第二滤波器单元，其产生响应于此的响应样本hn + 2-hp + 1以提供第二部分响应。 计算两个部分响应的和以提供总估计的系统响应。 因此，两个独立的滤波器单元同时作用，以相同的时间量提供现有技术的AFIR滤波器的两倍的系数。
-
公开(公告)号：EP0026603A1
公开(公告)日：1981-04-08
申请号：EP80303215.0
申请日：1980-09-12
IPC分类号： H04B7/185
CPC分类号： H04L25/03866 , H04B7/2123
摘要： A microprogrammable TDMA terminal controller is of modular construction. Frame reference and burst synchronization timing are resolved to the symbol level by a split frame counter, and a control RAM is reprogrammable "on-the-fly" to permit easy changes in terminal traffic assignments. The terminal controller includes a microprogrammed RAM controller (10) for performing real time burst and data path control functions, transmit and receive high-speed data path modules (12, 14) for interfacing with the modem and terrestrial interface ports and providing direct burst processing of the data, a microcomputer-based operation control (16) and a high stability oscillator (22)
-
55.发明公开A method of writing into and reading from the memory of a buffer memory system and a buffer memory system using such a method 失效一种用于写入和从缓冲系统的存储器和一种方法，使用这种缓冲系统的读取方法。
公开(公告)号：EP0026602A1
公开(公告)日：1981-04-08
申请号：EP80303214.3
申请日：1980-09-12
CPC分类号： H04B7/212
摘要： A common memory is used for asynchronous interleaved read and write operations. TDMA data compression and expansion is performed without ping-pong memories and elastic buffering is also possible. A buffer reset method is used to automatically slip a fixed number of bits in response to excessive phase shift between the read and write clock.
-
公开(公告)号：EP0685132A1
公开(公告)日：1995-12-06
申请号：EP92913830.0
申请日：1992-05-29
发明人： FANG, Russell, J.
CPC分类号： H04J13/00 , H04B7/216 , H04L5/02 , H04L2007/045 , Y02D70/22 , Y02D70/26 , Y02D70/446
摘要： A network of personal communications terminals communicating in a CDMA mode includes a reference station for transmitting a pilot tone that is pre-corrected at the reference station and is used at the remaining stations for frequency control, transmit power control and antenna acquisition and tracking. Voice activation is employed to permit the CDMA system to share the satellite transponder power and bandwidth in a fully Demand-Assignment-Multiple-Accessing (DAMA) manner. Burst-mode operation of a voice activated CDMA system is permitted by sending dummy data in the speech pausing period at a reduced (but not zero) power level, and the "near-far" problem inherent in a CDMA system is mitigated by the use of uplink power control.
-
公开(公告)号：EP0449511B1
公开(公告)日：1994-11-17
申请号：EP91302481.6
申请日：1991-03-21
CPC分类号： H01M10/345 , H01M10/0413 , H01M10/613 , H01M10/62 , H01M10/654 , H01M10/6554
-
公开(公告)号：EP0379203B1
公开(公告)日：1994-08-17
申请号：EP90101030.6
申请日：1990-01-18
发明人： Earl, Martin W.
CPC分类号： H01M10/345 , H01M10/44
-
59.发明公开Low loss, broadband stripline-to-microstrip transition 失效Verlustarmer，breitbandigerÜbergangzwischen einer Streifen- und einer Mikrostreifenleitung。
公开(公告)号：EP0551556A1
公开(公告)日：1993-07-21
申请号：EP92108183.2
申请日：1992-05-14
CPC分类号： H01P5/08 , H01Q21/0075
摘要： In a flat antenna incorporating one or more low-noise amplifier circuits onto a power divider network, a stripline-to-microstrip transition is provided. The amplifier circuit (100) is mounted vertically on a block (110) between a ground plane (10) and the radiator level (30), so that, in the transition, the electric field of the stripline power divider is rotated 90° to the microstrip mode. A block (110) on which the circuit (100) is mounted forms a connection between the ground plane (10) and the layer of radiating elements (30) which constitutes the other ground plane for the antenna.
摘要翻译： 在一个将一个或多个低噪声放大器电路结合到功率分配器网络上的扁平天线中，提供了带状线到微带的转换。 放大器电路（100）垂直安装在接地平面（10）和散热器级（30）之间的块（110）上，使得在转变中，带状线功率分配器的电场旋转90° 微带模式。 其上安装有电路（100）的块（110）形成接地平面（10）和构成天线另一接地平面的辐射元件层（30）之间的连接。
-
60.发明公开Low noise block down-converter for direct broadcast satellite receiver integrated with a flat plate antenna 失效块下变频器低噪音直接卫星广播的接收器与intergrierten平板。
公开(公告)号：EP0348370A2
公开(公告)日：1989-12-27
申请号：EP89850194.5
申请日：1989-06-12
IPC分类号： H03D9/06
CPC分类号： H03D9/0641
摘要： A compact multi-layer flat antenna structure incorporating a low noise block down-converter on the power divider network layer of the antenna. RF circuit losses are reduced, and the antenna/receiver combination is made more compact, for flush mounting. The antenna/receiver combination finds particular utility in direct broadcast satellite (DBS) applications for single or dual orthogonal polarizations. The connection between the antenna and receiver may be implemented in stripline/ coplanar waveguide, or other known technologies such as microstrip, slotline, and finline.
摘要翻译： 紧凑的多层扁平天线结构包含天线的功率分配器网络层上的低噪声块下变频器。 RF电路损耗减小，并且天线/接收器组合被制造得更紧凑，平面安装。 天线/接收器组合在认定为单或双正交极化的特殊直接广播卫星（DBS）应用中具有实用性。 如微带线，槽线，和鳍线：在天线和接收器之间的连接可以在带状线/共面波导，或其它已知的技术来实现。
-
-
-
-
-
-
-
-
-
搜索结果
68 条记录 (耗时 0.013 秒)
