专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明授权

US5581804A Nationwide communication system 失效
标题翻译：全国通信系统
公开(公告)号：US5581804A
公开(公告)日：1996-12-03
申请号：US387228
申请日：1995-02-13
申请人： Dennis W. Cameron , Walter C. Roehr, Jr. , Rade Petrovic , Jai P. Bhagat , Masood Garahi , William D. Hays , David W. Ackerman
发明人： Dennis W. Cameron , Walter C. Roehr, Jr. , Rade Petrovic , Jai P. Bhagat , Masood Garahi , William D. Hays , David W. Ackerman
IPC分类号： H04H20/67 , H04L27/26 , H04W4/12 , H04W68/00 , H04W68/10 , H04W84/02 , H04W84/06 , H04B7/26
CPC分类号： H04W84/025 , H04H20/67 , H04L27/2626 , H04L27/2647 , H04W68/10 , H04W84/022 , H04L27/2637 , H04W4/12 , H04W84/06
摘要： A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network. The base transmitters are divided into zonal assignments and broadcast in simulcast using multi-carrier modulation techniques. The system network controls the base transmitters to broadcast in simulcast during both systemwide and zonal time intervals. The system network dynamically alters zone boundaries to maximize information throughput. The preferred mobile unit includes a noise detector circuit to prevent unwanted transmissions. The system network further provides an adaptive registration feature for mobile units which controls the registration operations by the mobile units to maximize information throughput.
摘要翻译：一种用于系统网络和移动单元之间的通信的双向通信系统。系统网络包括网络中包括的多个基站发射机和基站接收机。基地发射机被分为区域分配和使用多载波调制技术在同时广播中广播。系统网络控制基地发射机在系统范围和区域时间间隔期间同时广播。系统网络动态地改变区域边界以最大化信息吞吐量。优选的移动单元包括用于防止不期望的传输的噪声检测器电路。系统网络还为移动单元提供了自适应注册特征，其控制移动单元的注册操作以使信息吞吐量最大化。

52. 发明授权

US5542099A Simulcast group determination of best signal 失效
标题翻译：联播组确定最佳信号
公开(公告)号：US5542099A
公开(公告)日：1996-07-30
申请号：US442090
申请日：1995-05-15
申请人： Gary W. Grube , Mark L. Shaughnessy , Richard Ng
发明人： Gary W. Grube , Mark L. Shaughnessy , Richard Ng
IPC分类号： H04H20/67 , H04B1/00
CPC分类号： H04H20/67
摘要： Processing of dispatch calls in a simulcast multi-site communication system begins when a source communication unit transmits a message to one or more network receivers. The received signals are analyzed at the received sites to determine a signal quality metric. Each of the signals are time stamped to identify when they where received. The received signals are transported with their time stamp and signal quality metric to each of the other sites via a digital communication network connecting the sites. Each transmitter site performs a transmit operation by first determining the receiver source with the best quality signal as indicated by the signal quality metric. The determined best quality signal is stored until it is time to transmit the signal in phase with all the other transmitter sites in a simulcast manner. The time stamp allows a time in the future to be chosen to accommodate the worst case expected transport delay through the digital network.
摘要翻译：当源通信单元向一个或多个网络接收器发送消息时，开始在联播多站点通信系统中的调度呼叫的处理。在接收到的站点分析接收到的信号以确定信号质量度量。每个信号都加上时间戳，以便识别何时收到。接收到的信号通过连接这些站点的数字通信网络以其时间戳和信号质量度量传送到每个其他站点。每个发射机站点通过首先用由信号质量度量指示的最佳质量信号确定接收机源来执行发射操作。存储所确定的最佳质量信号，直到与所有其他发射机站同时传播信号的同时广播方式。时间戳允许将来选择一个时间来适应通过数字网络预期的最差传输延迟。

53. 发明授权

US5537685A Method of establishing inter-base-station synchronization and mobile radio communication system using the method 失效
标题翻译：使用该方法建立基站间同步和移动无线电通信系统的方法
公开(公告)号：US5537685A
公开(公告)日：1996-07-16
申请号：US132247
申请日：1993-10-06
申请人： Keishi Matsuno
发明人： Keishi Matsuno
IPC分类号： H04B7/26 , H04H20/67 , H04J3/06 , H04J13/00 , H04Q7/30
CPC分类号： H04H20/67 , H04B7/2668 , H04B7/269
摘要： In a method of establishing synchronization between radio base stations in a mobile radio communication system, a control signal is transmitted at a predetermined time interval from each of the radio base stations and includes synchronization establishing information which indicates whether its own radio base station is in a first state in which synchronization has been established between the own radio base station and any other of the radio base stations or in a second state in which the synchronization has not yet been established. In a receiving radio base station, which is one of the radio base stations and has received the control signal transmitted from a transmitting radio base station, which is any other of the base stations it is determined, when the receiving radio base station is in the second state, whether the synchronization establishing information included in the received control signal indicates the first state or the second state. The method includes establishing synchronization in the receiving base station with the transmitting radio base station, when the synchronization establishing information included in the received control signal indicates the first state and setting, after establishing the synchronization with the transmitting radio base station, the synchronization establishing information included in the control signal transmitted from the receiving radio base station to indicate the first state.
摘要翻译：在建立移动无线通信系统中的无线基站之间的同步的方法中，从各个无线基站以预定的时间间隔发送控制信号，并且包括指示其本身的无线基站是否在已经在自身无线电基站和任何其他无线电基站之间建立同步的第一状态或者尚未建立同步的第二状态。在作为无线基站之一的接收无线基站中，接收到从发送无线基站发送的控制信号，该发送无线基站是基站中的任一个，确定了当接收无线基站处于第二状态，包括在接收到的控制信号中的同步建立信息是否指示第一状态或第二状态。该方法包括在接收基站与发射无线基站建立同步时，当接收到的控制信号中包含的同步建立信息表示第一状态并且在与发射无线基站建立同步后设置同步建立信息包括在从接收无线电基站发送的控制信号中以指示第一状态。

54. 发明授权

US5537398A Apparatus for multi-rate simulcast communications 失效
标题翻译：多速率联播通讯装置
公开(公告)号：US5537398A
公开(公告)日：1996-07-16
申请号：US439839
申请日：1995-05-12
申请人： Kazimierz Siwiak
发明人： Kazimierz Siwiak
IPC分类号： H04B7/00 , H04H3/00 , H04H20/33 , H04H20/67 , H04H20/86 , H04H60/51 , H04J4/00 , H04L27/26 , H04W88/18 , H04J1/02 , H04J11/00
CPC分类号： H04H20/33 , H04H20/67 , H04H20/86 , H04J4/00 , H04L27/2601 , H04W88/187 , H04H2201/70 , H04H60/51
摘要： A messaging system (500) for transmitting a message to a subscriber unit (312). The messaging system (500) includes a plurality of geographically distributed messaging transmitters (302-310), each transmitter designed to transmit in a first modulation format, such as FM, during a first transmission portion (102) including address information; and in a second modulation format, such as OFDM, during a second transmission portion (104) including message data (110) transmitted in frames. The address information includes message characterization information (108) defining a predetermined frame rate. The second transmission portion (104) includes message data (110) transmitted in frames representing a time sequence of N data bits at the predetermined frame rate and provides a plurality of carrier frequencies related to a frequency domain representation of the time sequence of data bits. The predetermined frame rate numerically matches the predetermined symbol rate. The subscriber unit (312) includes circuitry for receiving and demodulating both modulation formats.
摘要翻译：一种用于向订户单元（312）发送消息的消息系统（500）。消息系统（500）包括多个地理上分布的消息收发发射机（302-310），每个发射机设计成在包括地址信息的第一传输部分（102）期间以诸如FM的第一调制格式发射; 以及在包括以帧发送的消息数据（110）的第二传输部分（104）期间以诸如OFDM的第二调制格式。地址信息包括定义预定帧速率的消息表征信息（108）。第二传输部分（104）包括以表示以预定帧速率的N个数据比特的时间序列的帧发送的消息数据（110），并且提供与数据比特的时间序列的频域表示相关的多个载波频率。预定帧速率与预定符号率数值匹配。用户单元（312）包括用于接收和解调两种调制格式的电路。

55. 发明授权

US5535215A Method and apparatus for providing control channels and message channels in a radio communication system 失效
标题翻译：用于在无线电通信系统中提供控制信道和消息信道的方法和装置
公开(公告)号：US5535215A
公开(公告)日：1996-07-09
申请号：US432352
申请日：1995-05-01
申请人： William R. Hieatt, III
发明人： William R. Hieatt, III
IPC分类号： H04B7/26 , H04H20/67 , H04L27/00 , H04W16/12 , H04W48/12 , H04J3/16 , H04J4/00
CPC分类号： H04H20/67 , H04B7/2625 , H04B7/2643 , H04L27/0008 , H04W16/12 , H04W48/12 , Y02B60/50
摘要： A method and apparatus in a radio communication system (100, 101) provides simulcast control channels for a coverage area (500), and message channels transmitted in coverage zones (502) within the coverage area (500) on a time-division multiplex basis (FIG. 4). A first modulation technique generates (814, 816, 818) each of the message channels at a first average output power substantially less than a peak output power of a transmitter (202). A second modulation technique generates (806, 808, 810) each of the control channels at a second average output power approximately equal to the peak output power of the transmitter (202), thereby increasing usable coverage distance from the transmitter (202) for the control channel compared to the message channel. The control channels are allocated (FIG. 5) to the coverage zones (502) in a staggered geographic pattern such that reception of the control channels is maintained substantially throughout the coverage area (500).
摘要翻译：无线电通信系统（100,101）中的方法和装置提供覆盖区域（500）的同播广播控制信道，以及在时分复用基础上在覆盖区域（500）内的覆盖区域（502）中发送的消息信道（图4）。第一调制技术以基本上小于发射机（202）的峰值输出功率的第一平均输出功率产生每个消息信道（814,816,818）。第二调制技术以大致等于发射机（202）的峰值输出功率的第二平均输出功率产生每个控制信道（806,808,810），从而增加与发射机（202）的可用覆盖距离控制通道与消息通道相比较。以交错的地理模式将控制信道（图5）分配给覆盖区域（502），从而基本上在整个覆盖区域（500）中维持控制信道的接收。

56. 发明授权

US5483671A Method of determining transmission time to transmit an information packet to a remote buffer 失效
标题翻译：确定将信息包发送到远程缓冲区的传输时间的方法
公开(公告)号：US5483671A
公开(公告)日：1996-01-09
申请号：US189617
申请日：1994-02-01
申请人： David Helm , Bill Felderman , Mario DeRango
发明人： David Helm , Bill Felderman , Mario DeRango
IPC分类号： H04H20/67 , H04J3/06 , H04J3/16 , H04L7/04 , H04W84/08 , H04B1/00 , H04Q11/04
CPC分类号： H04H20/67 , H04J3/0632 , H04J3/1682 , H04W84/08 , H04L2007/045
摘要： A method at comparator (103) of determining the depth of remote buffer (107-109), by computing the difference between the current time and a next launch time, where the next launch time is the time at which a next information packet will be transmitted by the base station (104-106) on the radio channel. The next launch time is determined by the summation of, the time to transmit a previous information packet with error correcting information on the radio channel, and the launch time of a previous information packet. The method further includes maintaining the buffer depth between thresholds such that information packets will not be provided beyond a maximum threshold and filler packets will be provided when buffer depth is less than a minimum threshold.
摘要翻译：一种比较器（103），用于通过计算当前时间和下一个启动时间之间的差异来确定远程缓冲器（107-109）的深度，其中下一个启动时间是下一个信息包将成为的时间由无线电信道上的基站（104-106）发送。下一个发射时间由传输具有无线电信道上的纠错信息的先前信息分组的时间和先前信息分组的发射时间的总和确定。该方法还包括保持阈值之间的缓冲器深度，使得信息分组不会被提供超过最大阈值，并且当缓冲器深度小于最小阈值时将提供填充分组。

57. 发明授权

US5423059A Method for enhancing signal quality in a simulcast communication system 失效
标题翻译：一种提高联播通信系统信号质量的方法
公开(公告)号：US5423059A
公开(公告)日：1995-06-06
申请号：US98880
申请日：1993-07-29
申请人： Robert D. LoGalbo , Bradley M. Hiben , Mark C. Cudak
发明人： Robert D. LoGalbo , Bradley M. Hiben , Mark C. Cudak
IPC分类号： H04B7/06 , H04H20/67 , H04L1/24 , H04B7/00
CPC分类号： H04H20/67 , H04B7/0671 , H04L1/24
摘要： In a simulcast communication system (100), a communication unit (110-115) may request enhanced coverage area services by transmitting a request for enhanced signal quality to a central simulcast controller (101). Upon receipt, the central simulcast controller (101) identifies, based on information pertaining to the location of the communication unit, a set of transmitters (102-109) to enhance coverage in the area of the communication unit. The central simulcast controller determines enhanced coverage area delays for each of the transmitters and adjusts the respective delays of each transmitter such that transmitted signal quality is enhanced at the location of the communication unit.
摘要翻译：在联播通信系统（100）中，通信单元（110-115）可以通过向中央联播控制器（101）发送增强信号质量的请求来请求增强的覆盖区域服务。在接收时，中央联播控制器（101）基于与通信单元的位置相关的信息来识别一组发射机（102-109），以增强通信单元的区域中的覆盖。中央联播控制器确定每个发射机的增强的覆盖区域延迟，并且调整每个发射机的相应延迟，使得在通信单元的位置增强发射的信号质量。

58. 发明授权

US5365569A Digital simulcast transmission system 失效
标题翻译：数字联播传输系统
公开(公告)号：US5365569A
公开(公告)日：1994-11-15
申请号：US931789
申请日：1992-08-17
申请人： Mark L. Witsaman , Roger E. Benz , David W. Glessner , Joel R. Crowley-Dierks
发明人： Mark L. Witsaman , Roger E. Benz , David W. Glessner , Joel R. Crowley-Dierks
IPC分类号： H04H20/67 , H04W84/02 , H04M11/00 , H04B1/00
CPC分类号： H04H20/67 , H04W84/022
摘要： A simulcast system for broadcasting the same signal for a number of spaced-apart broadcast sites is disclosed. The system (20) of this invention includes a hub (28) adapted to receive the signal to be simulcast and a number of stations (30) that actually broadcast the signal. The hub places the digital signal packets referred to as PDBs (36). As part of the signal packetization process, the hub evaluates the rate at which the signals should be broadcast and assigns a start time at which the signals should be broadcast; this information is attached to the PDBs. After a PDB is created it is forwarded to the stations over a link channel. Each station includes a station controller (32) and a station transmitter (34). The station controller, upon receiving a PDB, forwards the signal therein to the transmitter at the start time indicated and at the appropriate broadcast rate. All of the stations transmitting the signals contained within a single PDB do so based on the start time and broadcast rate information contained in that PDB. Consequently, each station broadcasts the same signals at the same time and at the same rate so as to ensure their simultaneous transmission.
摘要翻译：公开了一种用于为多个间隔开的广播站点广播相同信号的联播系统。本发明的系统（20）包括适于接收要同步的信号的集线器（28）和实际广播该信号的多个站（30）。集线器将数字信号包称为PDB（36）。作为信号分组处理的一部分，集线器评估信号应该被广播的速率，并分配应该广播信号的开始时间; 此信息附加到PDB。在创建PDB之后，它将通过链路信道转发到站。每个站包括站控制器（32）和站发射机（34）。站控制器在接收到PDB时，在指示的开始时间和适当的广播速率下将其中的信号转发给发射机。发送包含在单个PDB中的信号的所有站基于该PDB中包含的开始时间和广播速率信息来进行。因此，每个站同时以相同的速率广播相同的信号，以确保它们同时传输。

59. 发明授权

US5361398A Method and apparatus for transmission path delay measurements using adaptive demodulation 失效
标题翻译：使用自适应解调的传输路径延迟测量的方法和装置
公开(公告)号：US5361398A
公开(公告)日：1994-11-01
申请号：US010910
申请日：1993-01-29
申请人： Paul R. Christian , Casimir Karczewski
发明人： Paul R. Christian , Casimir Karczewski
IPC分类号： H04B7/01 , H04B7/00 , H04B7/26 , H04H20/67 , H04L7/00 , H04Q7/36
CPC分类号： H04H20/67 , H04J3/0682 , H04L2007/047 , H04L7/046
摘要： A simulcast transmission system (100) utilizes adaptive demodulation to provide a method and apparatus for automatic delay equalization measurements. The simulcast transmission system (100) comprises a control station (101), and a plurality of remote transmission stations (201, 301) capable of re-transmitting a received delay equalization measurement signal which includes at least a correction bit pattern signal followed by a synchronization pattern signal. The control station (101) comprises a transmitter (131, 181) which transmits the delay equalization measurement signal, a receiver (151, 191) which receives the re-transmitted delay equalization measurement signal, a correlator (115, 762) which correlates the received synchronization pattern signal to obtain a coarse time of reception, a correction bit pattern analyzer (115, 776-802) which analyzes the received correction bit pattern signal to derive a fine reception time correction factor, and a time corrector (115, 804) which corrects the coarse time of reception with the fine reception time correction factor to obtain a corrected time of reception of the delay equalization measurement signal at the control station (101).
摘要翻译：联播传输系统（100）利用自适应解调来提供用于自动延迟均衡测量的方法和装置。联播传输系统（100）包括控制站（101）和能够重新发送接收到的延迟均衡测量信号的多个远程传输站（201,301），该远程传输站包括至少一个校正位模式信号，随后是同步模式信号。控制站（101）包括发送延迟均衡测量信号的发射机（131,181），接收重传的延迟均衡测量信号的接收机（151,191），将相关器（115,762）与接收同步模式信号以获得粗略的接收时间;分析接收到的校正位模式信号以导出精细接收时间校正因子的校正位模式分析器（115,776-802）和时间校正器（115,804）其利用精细接收时间校正因子校正粗略的接收时间，以获得在控制站（101）处的延迟均衡测量信号的校正接收时间。

60. 发明授权

US5239671A Simulcast satellite paging system with provision for signal interruption 失效
标题翻译：用于信号中断的SIMULCAST卫星寻呼系统
公开(公告)号：US5239671A
公开(公告)日：1993-08-24
申请号：US612064
申请日：1990-11-13
申请人： Roger D. Linquist , Malcolm M. Lorang
发明人： Roger D. Linquist , Malcolm M. Lorang
IPC分类号： H04B7/185 , H04H20/67 , H04W84/02
CPC分类号： H04H20/67 , H04B7/18567 , H04W84/022
摘要： A paging system includes a satellite uplink (40) for assembling paging information and transmitting it to a satellite (26). The satellite (26) is then operable to transmit in a simulcast manner all the information to various regional paging systems (42). Each of the paging systems (42) includes a plurality of towers (10) each containing a satellite receiver (50), a satellite dish (48) associated therewith and a paging transmitter (52). Each of the satellite receivers (50) are operable to receive the information transmitted from the satellite (26) at substantially the same time such that there is no phase difference between any of the towers, regardless of location. Therefore, the transmitters (50) can transmit through antennas (12) information at the paging frequency with substantially no relative delays relative to each of the antennas (12). A backup link receiver (28) is provided for interfacing with a backup link transmitter (70). In the event of a failure of the receivers (50) or the satellite (26), the link transmitter (70) will transmit the paging information directly to select ones of the towers (10) over a separate frequency.

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