专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明公开

EP0737380A4 A WIRELESS DIGITAL SYNCHRONIZED DIVERSITY RECEIVER 失效
标题翻译：数字同步器多样性 - FUNKEMPFÄNGER
公开(公告)号：EP0737380A4
公开(公告)日：2002-01-30
申请号：EP95905948
申请日：1994-12-28
申请人： ATMEL CORP
发明人： ANVARI KIOMARS , BAHAI AHMAD SHAIKH , BEHTASH SAMAN , WINSHIP PETER
IPC分类号： H04L27/22 , H04B1/10 , H04B7/08 , H04B7/10 , H04B7/26 , H04B17/00 , H04L1/02 , H04L25/03 , H03D3/00 , H03D1/06 , H03D11/04 , H03K5/01 , H03K6/04 , H03K9/06 , H04L1/00
CPC分类号： H04B7/0857 , H04B17/318
摘要： A digital receiver (10) for receiving an RF signal has a conventional RF to intermediate frequency (IF) converter (14). The IF signal, however, is amplified with a limit on its amplitude (20). In addition, a Receive Signal Strength Intensity (RSSI) signal is generated (28). The RSSI signal contains the envelope information of the modulated IF signal. The IF amplitude limited signal containing phase information is then digitized and a complex baseband signal is produced (68). The complex baseband signal is then combined with the RSSI signal to restore the amplitude information of the modulated IF signal in the complex baseband signal. The restored complex baseband signal can be equalized with a conventional equalizer (70) to remove intersymbol interference. A conventional symbol detector (80) detects the symbol in this signal stream.
摘要翻译：用于接收RF信号的数字接收机（10）具有传统的RF到中频（IF）转换器（14）。然而，IF信号在幅度上受到限制（20）。另外，生成接收信号强度强度（RSSI）信号（28）。 RSSI信号包含调制的IF信号的包络信息。然后将包含相位信息的IF幅度限制信号数字化并产生复合基带信号（68）。复合基带信号然后与RSSI信号组合以恢复复基带信号中的调制IF信号的幅度信息。恢复的复基带信号可以用传统的均衡器（70）进行均衡以消除符号间干扰。常规符号检测器（80）检测该信号流中的符号。

62. 发明授权

EP1075736B1 TRANSMIT DIVERSITY METHODS, SYSTEMS, AND TERMINALS USING SCRAMBLE CODING 有权
标题翻译：发送分集方式，系统和设备与SCRAMBLER CODING
公开(公告)号：EP1075736B1
公开(公告)日：2001-12-19
申请号：EP99915107.9
申请日：1999-03-30
申请人： ERICSSON INC.
发明人： KHAYRALLAH, Ali, S. , ZANGI, Kambiz, C. , RAMESH, Rajaram
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0669 , H04L1/0618

63. 发明公开

EP0806844A4 DIVERSITY RECEIVER AND CONTROL METHOD THEREFOR 失效
标题翻译：分集接收机和相关控制方法
公开(公告)号：EP0806844A4
公开(公告)日：2000-10-11
申请号：EP96940143
申请日：1996-11-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAWAHASHI MAMORU , ANDO HIDEHIRO , MIKI YOSHINORI , HIGUCHI KENICHI , TANAKA SHINYA
IPC分类号： H04B1/707 , H04B1/712 , H04B7/08 , H04B7/10 , H04L1/02 , H04L1/06 , H04W16/28 , H04B7/26 , H04J13/04
CPC分类号： H04B1/709 , H04B1/707 , H04B1/712 , H04B7/0851 , H04B7/0857 , H04B7/086 , H04L1/02 , H04L1/06
摘要： A weight coefficient is feedback-controlled so as to maximize the ratio of desired signal power to interference power (SIR), whereby it is possible to improve reception quality and to increase the number of subscribers per cell and it is also possible to increase the speed of establishment of diffused code synchronization and the speed of convergence of the weight coefficient. A coherence adaptive diversity arrangement to which absolute synchronization detection is applicable is adopted. The weighht coefficient of each diversity branch is adaptively feedback-controlled, whereby it is possible to reduce the influence of interference power from other communicators, so that the number of subscribers per cell can be increased. Furthermore, a direction in which a highest reception SIR is obtainable is determined by rotating an antenna with directivity of predetermined angle being given to it. After that, by setting the initial value of the weight coefficient to the direction, the speed of convergence of the weight coefficient can be increased.

64. 发明公开

EP0989697A1 Multiple antenna home base for digital cordless telephones 失效
标题翻译：数字无绳电话的多天线家庭基地
公开(公告)号：EP0989697A1
公开(公告)日：2000-03-29
申请号：EP99204225.9
申请日：1994-09-28
申请人： Conexant Systems, Inc.
发明人： Wright, David Hysignal Inc. , Petranovich, James E. , Baker, Rex L. , Riedel, Neal K.
IPC分类号： H04L1/02 , H04L27/08 , H03G3/30
CPC分类号： H04L1/0019 , A63B21/00178 , A63B21/00181 , A63B21/0058 , A63B21/4047 , A63B22/0012 , A63B22/0015 , A63B22/0023 , A63B22/203 , A63B23/03575 , A63B23/0417 , A63B2022/206 , A63B2071/025 , B22F9/082 , B22F2201/02 , B22F2998/00 , B22F2998/10 , B22F2999/00 , C22C33/0257 , H03G3/001 , H03G3/3052 , H04B7/0805 , H04B7/0808 , H04B7/0814 , H04L1/0001 , H04L1/0061 , H04L1/06 , H04L1/20 , B22F3/16 , B22F3/15 , B22F3/14 , B22F2201/10
摘要： The present invention provides methods for combining antenna diversity (10,12) and gain control (15,19,17) in a communications system using a single chain of receiver characteristics. A number of input parameters related to various characteristics of a received signal are used to determine the quality of the received signal. The antenna diversity and gain control procedures are enabled or disabled based on the signal quality. The antenna diversity procedure estimates the signal level of the non-operational antenna using an infinite impulse response digital filter. The gain control procedure selects one of three gain paths based on the received signal strength.
摘要翻译：本发明提供了在使用单链接收机特性的通信系统中组合天线分集（10,12）和增益控制（15,19,17）的方法。使用与接收信号的各种特性有关的多个输入参数来确定接收信号的质量。根据信号质量启用或禁用天线分集和增益控制程序。天线分集过程使用无限脉冲响应数字滤波器来估计非操作天线的信号电平。增益控制过程根据接收信号强度选择三个增益路径中的一个。

65. 发明公开

EP0989688A2 Spread spectrum diversity transmitter/receiver 有权
标题翻译： Spreizspektrumdiversitysender /-empfänger
公开(公告)号：EP0989688A2
公开(公告)日：2000-03-29
申请号：EP99118881.4
申请日：1999-09-24
申请人： NEC CORPORATION
发明人： Tsujimoto, Ichiro
IPC分类号： H04B1/707 , H04L1/02 , H04L1/00
CPC分类号： H04L1/0059 , H04L1/0054 , H04L1/0065 , H04L1/0071 , H04L1/02 , H04L1/08
摘要： A spread spectrum diversity transmitter/receiver, in which a bit error rate is improved even at a severe multi path fading channel, is provided. At a transmitting section, a multi dimensional transmitting signal by code division is used not only for diversity itself but also for a convolutional encoding among diversity branches by a convolutional encoder (104). With this, an error correction function can be installed. At a receiving section, a Viterbi decoding is performed before a majority judgment is performed, a bit error at the front stage of a majority judging 10 circuit (117) is suppressed and the likelihood of the majority judgment is increased and consequently the bit error rate is largely improved.
摘要翻译：提供了即使在严重的多径衰落信道也提高误比特率的扩展频谱分集发射机/接收机。在发送部分，通过码分割的多维发送信号不仅用于分集本身，而且还用于卷积编码器（104）的分集分支之间的卷积编码。因此，可以安装纠错功能。在接收部分，在执行多数判断之前执行维特比解码，大多数判断10电路（117）的前级的比特误差被抑制，并且多数判断的可能性增加，并且因此比特错误率大大改善。

66. 发明公开

EP0636291A4 COORDINATED CODING FOR DIGITAL TRANSMISSION. 失效
标题翻译：协调的代码数字传输。
公开(公告)号：EP0636291A4
公开(公告)日：1999-09-01
申请号：EP93907567
申请日：1993-03-16
申请人： BELL COMMUNICATIONS RES
发明人： KERPEZ KENNETH JAMES
IPC分类号： H04L27/34 , H03H15/00 , H03H17/00 , H03H21/00 , H03M13/23 , H04B3/04 , H04B14/04 , H04J11/00 , H04L1/02 , H04L25/03 , H04L25/14 , H04K1/10 , H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08 , H04L27/28
CPC分类号： H04L1/02 , H04L25/14

67. 发明公开

EP0913958A2 Diversity reception apparatus 有权
标题翻译： Vorrichtung zum Diversity-Empfang
公开(公告)号：EP0913958A2
公开(公告)日：1999-05-06
申请号：EP98120139.5
申请日：1998-10-27
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Urabe, Yoshio , Takai, Hitoshi , Yamasaki, Hidetoshi , Mori, Kenichi
IPC分类号： H04B7/08 , H01Q21/00 , H04L1/02
CPC分类号： H01Q3/267 , H04B7/0817 , H04B7/0888 , H04L1/06
摘要： A demodulator 1 obtains demodulated data in a plurality of channels. Estimating portions 2a and 2b estimate and output the numbers of erroneous symbols and error locations thereof in the demodulated data. A data comparator 3 compares the demodulated data corresponding to the error locations with the demodulated data in the corresponding locations in other channels to determine whether the error location is correct, and it outputs a decision signal in response to the determination. A data selector 4 selects one of the demodulated data in the plurality of channels on the basis of the numbers of erroneous symbols and the decision signals and outputs the data as selected data. It is then possible to maintain the reliability of error detection even when a less redundant short error detecting code is used, and also to accurately select a channel of good quality even when the demodulated data in all channels contain the same extent of errors.
摘要翻译：解调器1获得多个信道中的解调数据。估计部分2a和2b估计并输出解调数据中的错误符号和错误位置的数目。数据比较器3将对应于错误位置的解调数据与其他通道中的对应位置中的解调数据进行比较，以确定误差位置是否正确，并且响应于该确定而输出判定信号。数据选择器4基于错误符号和判定信号的数量选择多个信道中的一个解调数据，并输出数据作为选择的数据。即使当使用较少冗余的短错误检测码时，也可以保持错误检测的可靠性，并且即使当所有信道中的解调数据包含相同的错误程度时，也可以准确地选择质量良好的信道。

68. 发明授权

EP0643542B1 Verfahren zur Vereinigung von Datenströmen 失效
标题翻译：一种用于组合的数据流的方法
公开(公告)号：EP0643542B1
公开(公告)日：1999-02-03
申请号：EP94113649.1
申请日：1994-08-31
申请人： SIEMENS AKTIENGESELLSCHAFT
发明人： Eul, Hermann-Josef
IPC分类号： H04B7/04 , H03M13/00 , H04L1/02
CPC分类号： H03M13/3723 , H03M13/45 , H04B7/022 , H04L1/02

69. 发明公开

EP0669025A4 A DUAL MODE RADIO COMMUNICATION UNIT. 失效
标题翻译：两种模式RADIO新闻单位。
公开(公告)号：EP0669025A4
公开(公告)日：1997-05-07
申请号：EP93923291
申请日：1993-10-07
申请人： MOTOROLA INC
发明人： BORTH DAVID E , HAUG JOHN R , RASKY PHILLIP D , CHIASSON GREGORY M
IPC分类号： G06F11/10 , H03M13/23 , H03M13/27 , H04B7/26 , H04L1/00 , H04L1/02 , H04L1/06 , H04W88/06
CPC分类号： H04L1/0043 , H04L1/06 , H04W88/06
摘要： A dual mode radio communication unit (102, 104) for a digital communication system is provided having an error controller including an error detection encoder (111) and a forward error correction encoder (112) which encode an input information signal into an error protected data bit stream. In addition, the communication unit includes a mode selector which enables either the error detection encoder or the forward error correction encoder used with a particular mode of operation of the communication unit. Further, a corresponding dual mode radio communication unit is provided having an error controller for generating estimated information signal samples according to a group of algorithms consisting of either an error detection algorithm (261) or an error correction algorithm (202). In addition, the corresponding communication unit includes a mode selector (141) for receiving a signal according to a particular one of the group of algorithms which is associated with a particular mode of operation of the corresponding communication unit.

70. 发明公开

EP0741469A2 Apparatus and methods for decoding a communication signal 失效
标题翻译： Einrichtung und Verfahren zur Dekodierung eines Kommunikationssignals
公开(公告)号：EP0741469A2
公开(公告)日：1996-11-06
申请号：EP96302679.4
申请日：1996-04-17
申请人： AT&T IPM Corp.
发明人： Calderbank, Arthur Robert , Pottie, Gregory J. , Seshadri, Nambirajan
IPC分类号： H04L1/02 , H04L25/03 , H04B7/216
CPC分类号： H04L1/0065 , H04L1/004 , H04L1/0046 , H04L1/08 , H04L25/03
摘要： Apparatus and methods are provided for adaptively decoding communication signals. A received input signal, representing a communication between a first node and a second node, is processed to produce an output signal. The received input signal includes a desired data signal and at least one interfering signal. The desired data signal includes at least one data set and is preferably encoded using one of a linear combination code and an algebraic combination code. The input signal is processed by identifying at least a portion of the desired data signal within the input signal and isolating the desired data signal with respect to the one or more interfering signals to produce the output signal. The output signal represents the desired data signal.
摘要翻译：提供了用于自适应地解码通信信号的装置和方法。处理表示第一节点和第二节点之间的通信的接收到的输入信号以产生输出信号。所接收的输入信号包括期望的数据信号和至少一个干扰信号。期望的数据信号包括至少一个数据集，并且优选地使用线性组合码和代数组合码之一进行编码。通过识别输入信号内的期望数据信号的至少一部分来处理输入信号，并且相对于一个或多个干扰信号隔离期望的数据信号以产生输出信号。输出信号表示所需的数据信号。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式