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61. 发明公开

EP1103126A1 CELLULAR TELEPHONY SEARCHER 有权
标题翻译：探测器用于蜂窝电话
公开(公告)号：EP1103126A1
公开(公告)日：2001-05-30
申请号：EP00936466.2
申请日：2000-06-02
申请人： D S P C Israel Ltd.
发明人： SOKOLOV, Dotan , BEN-ELI, David
IPC分类号： H04L27/30 , H04L27/06 , H04L1/02
CPC分类号： H04B1/70775 , H04B1/70756 , H04B1/708 , H04B1/709 , H04B2201/70701 , H04B2201/70702 , H04B2201/70707
摘要： A searcher (10) for mobile station of a cellular telephony network. Pilot signal from nearby base stations are correlated with a pseudonoise sequence inside a search window, using a bank of correlators (20). Each correlator (20) is assigned a different delay, from among a sequence of delays in the window (14). At each delay, correlation is performed initially for a first dwell time. If the resulting correlation value exceeds a threshold, the correlation is continued for a second dwell time. Otherwise, the correlator (20) is set to the next delay in the sequence. Only the outputs of second dwell correlations are used to identify the nearest base station. Some correlations may perform first dwell correlations at new delays in the same time that other correlators are still performing second dwell correlations at old delays in the window.

62. 发明公开

EP0852853A4 CELLULAR COMMUNICATION SYSTEM WITH MULTIPLE CODE RATES 失效
标题翻译：不同的代码率蜂窝通信系统
公开(公告)号：EP0852853A4
公开(公告)日：2001-01-17
申请号：EP96935901
申请日：1996-09-20
申请人： PACIFIC COMM SCIENCES INC
发明人： GARDNER STEVEN H , PETRANOVICH JAMES E , HARDIN C THOMAS
IPC分类号： H04B14/04 , H04B7/005 , H04B7/26 , H04L1/00 , H04L29/06 , H04B17/00 , H04L1/02 , H04L1/20 , H04L29/08
CPC分类号： H04W52/267 , H04B7/2659 , H04L1/0009 , H04L1/0015 , H04L1/0017 , H04L1/0025 , H04L1/0032 , H04L1/0046 , H04L1/0068 , H04L1/0071 , H04L1/208 , H04L69/18
摘要： A method and apparatus for selecting an error correction code rate in a cellular radio system. Each base station broadcasts a power product value, PP, which is its transmit power, PBT, multiplied by its desired receive power, PBR. A mobile unit determines its appropriate transmit power, PMT, by measuring its received power, PMR, and calculating PP/PMR (24). If, due to a large channel loss, the calculation result exceeds the maximum transmit power capability of the mobile unit (25), the mobile unit uses a lower code rate and adjusts the transmit power accordingly (27, 31). Three code rates, 2/3, 1/2, and 1/3, are used in the preferred embodiment in dependence on the amount of channel loss. The code rate selection can also depend on the quantity of data to be transmitted (30, 33, 34). A base station can detect the code rate by attempting to decode all code rates and choosing the best result.

63. 发明公开

EP1025663A1 A SYSTEM AND METHOD FOR MITIGATING INTERMITTENT INTERRUPTIONS IN AN AUDIO RADIO BROADCAST SYSTEM 审中-公开
标题翻译： DEVICE AND METHOD FOR一天我避免中断在音频广播系统
公开(公告)号：EP1025663A1
公开(公告)日：2000-08-09
申请号：EP98953529.9
申请日：1998-10-06
申请人： USA Digital Radio, Inc.
发明人： KROEGER, Brian, William , STEHLIK, Roy, Ronald
IPC分类号： H04H1/00 , H04L1/02 , H04L27/26 , H04B7/12
CPC分类号： H04H20/22 , H04B7/12 , H04H20/30 , H04H60/11 , H04H2201/183 , H04H2201/20 , H04L1/02 , H04L5/0005
摘要： A system (100) for mitigating intermittent interruptions in an audio radio broadcast system is provided wherein a primary radio signal and a redundant radio signal are transmitted from a transmitter subsystem (120) and received by a receiver subsystem (140). The output (112) of an audio source (110) is coupled to a modulator (160) for modulating a radio frequency signal (162) for coupling to a transmit antenna (172). A second output (114) of audio source (110) is coupled to a delay circuit (116), for adding a predetermined time delay thereto. The delayed audio source signal is coupled to a modulator (164) for modulating a second radio frequency signal (166) that is also coupled to the transmit antenna (172). The receiver subsystem (140) receives both the primary radio signal and the delayed redundant radio signal and couples each to a respective demodulator (180, 182). At least demodulator (180) includes a circuit (181) for determining the degradation in the primary radio signal and provides a quality measurement output signal (186) to a blend control circuit (190). The recovered primary audio signal from demodulator (180) is coupled to a second delay circuit (184), the time delay of second delay circuit (184) being substantially equal to the time delay of delay circuit (116). The audio output from delay circuit (184) and the redundant audio output from demodulator (182) are coupled to a blending subsystem (135), wherein each is combined with a weighting factor and then combined together to form a composite audio signal for coupling to the audio output circuit (150).

64. 发明公开

EP0767546A3 Method and apparatus for providing time diversity using multiple base stations 失效
标题翻译：使用多个基站的方法和装置，用于时间分集
公开(公告)号：EP0767546A3
公开(公告)日：2000-04-19
申请号：EP96306967.9
申请日：1996-09-25
申请人： AT&T Corp.
发明人： Weerackody, Vijitha
IPC分类号： H04B7/06 , H04L1/02
CPC分类号： H04B7/0671 , H04B7/0613 , H04L1/06
摘要： The invention provides a method and apparatus for transmitting digital signaling information (from 10) to a receiver using a plurality of antennas (55). The invention involves applying a channel code (in 20) to a digital signal producing one or more symbols. A plurality of symbol copies is made and each copy is weighted (in 50) by a distinct time varying function. Each of the antennas which are located at two or more base stations transmits a signal based on one of the weighted symbol copies. Any channel code may be used with the invention, such as a convolutional channel code or block channel code. Weighting provided to symbol copies may involve application of an amplitude gain, phase shift, or both. The present invention may be used in combination with either or both conventional interleavers and constellation mappers.

65. 发明公开

EP0987851A1 Multiple antenna home base for digital cordless telephones 失效
标题翻译： Basisstationfürein digitales schnurloses Telefon mit Mehrfachantennenanordnung
公开(公告)号：EP0987851A1
公开(公告)日：2000-03-22
申请号：EP99204226.7
申请日：1994-09-28
申请人： Conexant Systems, Inc.
发明人： Wright, David , 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一接收机特性链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相关的多个输入参数来确定接收信号的质量。基于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。增益控制程序根据接收到的信号强度来选择三个增益路径中的一个。

66. 发明公开

EP0876045A1 Improved billing scheme for a telecommunications network 失效
标题翻译： Verb desserten AbrechungsschemafürTelekommunikationsnetz
公开(公告)号：EP0876045A1
公开(公告)日：1998-11-04
申请号：EP97108586.5
申请日：1997-05-28
申请人： NORTHERN TELECOM LIMITED
发明人： Bayraktar, Arsavir
IPC分类号： H04M15/00 , H04L1/02
CPC分类号： H04M15/49 , H04L1/06 , H04M15/00 , H04M2215/46
摘要： A billing scheme for a telecommunications network is described in which a billing record for a call including at least a plurality of data bytes is generated in a switch (10), each billing record is duplicated, and check information is generated from each data byte of a billing record and associated with each said data byte to form a protected billing record. Each protected billing record of a duplicated pair is transmitted via two independent transmission lines to processing means (40, 50) in which the associated check information is generated byte-for byte from each received billing record and the generated check information is compared byte-for-byte with the transmitted check information in parity checking circuits (60, 61). If for any one byte of a billing record, the generated check information does not agree with the received check information, that billing record is discarded. If there is no inconsistency between the received and generated check information for both billing records of a duplicated pair, the two billing records of the pair are compared bit-for-bit in a comparator (70). If any difference is found between the billing records of the pair, both billing records are discarded. Otherwise the received billing records are stored in non-volatile memory (75).
摘要翻译：描述了用于电信网络的计费方案，其中在交换机（10）中生成包括至少多个数据字节的呼叫的计费记录，每个记帐记录被复制，并且从每个数据字节生成检查信息计费记录并与每个所述数据字节相关联以形成受保护的记帐记录。复制对的每个受保护的记帐记录经由两条独立的传输线路发送到处理装置（40,50），其中相关联的检查信息是从每个接收到的记帐记录中生成的字节字节，并且生成的检查信息被比较为字节与奇偶校验电路（60,61）中发送的校验信息一致。如果对于记帐记录的任何一个字节，所生成的检查信息与接收到的检查信息不一致，该记帐记录被丢弃。如果对于复制对的两个记帐记录的接收和生成的检查信息之间没有不一致，则在比较器（70）中比较该比对的两个记帐记录。如果该对的记帐记录之间发现任何差异，则两个记帐记录将被丢弃。否则所接收的记帐记录被存储在非易失性存储器（75）中。

67. 发明公开

EP0738056A3 Verfahren und Vorrichtung zur Informationsübertragung in periodisch gestörten drahtlosen Übertragungskanälen 失效
标题翻译：用于在无线传输信道发送信息的方法和装置周期性干扰
公开(公告)号：EP0738056A3
公开(公告)日：1997-08-20
申请号：EP96105825.2
申请日：1996-04-13
申请人： GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co. KG.
发明人： Müller, Werner, c/o Grundig E.M.V.
IPC分类号： H04L1/08 , H04L1/02 , H04B7/02
CPC分类号： H04L1/08
摘要： Die Erfindung betrifft ein Verfahren zur Informationsübertragung in periodisch gestörten, nicht leitungsgebundenen Übertragungskanälen und eine Vorrichtung zur Durchführung des Verfahrens.
Gemäß der Erfindung wird der Informationsstrom senderseitig in einem Verzögerungsglied (1), dessen Verzögerungszeit der halben Störperiodendauer entspricht, verzögert. Der verzögerte sowie der unverzögerte Informationsstrom wird durch Funkübertragung an einen Empfänger gesendet. Im Empfänger wird der senderseitig unverzögerte Informationsstrom in einem empfängerseitigen Verzögerungsglied (4), das die gleiche Verzögerungszeit wie das senderseitige Verzögerungsglied (1) aufweist, verzögert und über einen Umschalter (5) mit der Frequenz der Störungen wird das verzögerte bzw. unverzögerte Informationssignal weitergeschaltet.

68. 发明公开

EP0716790A4 INFORMATION TRANSMISSION SYSTEM AND METHOD OF OPERATION 失效
标题翻译：信息传输系统和方法进行操作
公开(公告)号：EP0716790A4
公开(公告)日：1997-05-28
申请号：EP93920376
申请日：1993-08-26
申请人： NTP INC
发明人： CAMPANA THOMAS J JR
IPC分类号： H04L27/18 , H03M13/27 , H04B1/02 , H04B7/10 , H04B7/26 , H04L1/02 , H04Q7/16 , G06F11/10 , H03M13/00 , H04B7/02 , H04B15/00
CPC分类号： H04L1/02 , H04B7/10
摘要： A system for atmospheric transmission (102, 600) of information subject to fading for a time interval using a radio frequency carrier (106, 616) modulated with a subcarrier (Figs. 7A and B) provides a first encoded information stream (Fig. 8) and a second encoded information stream (Fig. 8) being delayed by a time delay interval (Fig. 7) with respect to the first information stream which is equal to or greater than the time interval of the atmospheric fading and an encoder. The first and second encoded information streams modulate the subcarrier to produce identical first and second parallel information streams modulated on cycles of the subcarrier. Receiving circuit (Fig. 23) receives the parallel information streams and has a detector for detecting transmitted streams and at least one processor, responsive to the detected parallel information streams, for determining if faded information is present in at least one of the detected streams and in response to determined faded information replacing faded information with information which is time offset.

69. 发明公开

EP0651925A4 FREQUENCY HOPPING TIME-DIVERSITY COMMUNICATIONS SYSTEMS AND TRANSCEIVERS FOR LOCAL AREA NETWORKS. 失效
标题翻译：跳频和时间分集通信系统和发送接收器，用于局域网。
公开(公告)号：EP0651925A4
公开(公告)日：1997-05-21
申请号：EP93918322
申请日：1993-07-23
申请人： COMSOURCE SYSTEMS CORP
发明人： HILL LAWRENCE WOODBRIDGE
IPC分类号： G05D1/02 , G06F11/00 , H03G3/00 , H04B1/713 , H04B3/54 , H04B3/56 , H04B5/00 , H04B7/06 , H04B7/12 , H04J13/00 , H04L1/02 , H04L12/40 , H04B1/38 , H04B3/46 , H04B17/00 , H04J3/24 , H04L7/00 , H04L27/08
CPC分类号： H04J13/00 , G05D1/0265 , G06F11/076 , H03G3/001 , H03G3/002 , H04B1/69 , H04B1/713 , H04B1/715 , H04B3/54 , H04B3/56 , H04B7/0671 , H04B7/12 , H04B2001/7152 , H04B2001/71563 , H04B2203/5408 , H04B2203/5416 , H04B2203/5425 , H04B2203/5445 , H04B2203/5483 , H04B2203/5495 , H04L1/02
摘要： A system utilizing adaptive frequency-hopped spread spectrum modulation to communicate over noisy communications channels is described. Individual packets of data are transmitted with FSK modulation using two frequencies chosen from a larger set. An error coding system is used in which data on the quality of reception at each network transceiver is used to alter the gain of the receiver, the bit rate of the transmission, and the specific frequencies employed by the network for the purpose of optimizing communicatioin error rate. A Master transceiver, controlling network management, transmits channel control information to other transceivers on the network, enabling system synchronization, acquisition of an existing network by new subscribers. Each transceiver comprises a frequency controlled carrier generator, a pair of digital detectors each having a frequency controlled bandpass filter microprocessors for control and broad band coupling networks for coupling the transceiver to a communications channel.

70. 发明授权

EP0454246B1 Dispositif de mise en phase de signaux dans un système à doublement du conduit numérique 失效
标题翻译：相位校正电路，用于在与双数字线路的系统的信号。
公开(公告)号：EP0454246B1
公开(公告)日：1995-08-02
申请号：EP91200949.5
申请日：1991-04-22
申请人： T.R.T. TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES , Philips Electronics N.V.
发明人： Bonnet, Jean-Marc , Auclair, Jean-Yves
IPC分类号： H04L1/02 , H04J3/06
CPC分类号： H04J3/0629 , H04L1/02

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