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公开(公告)号：US5091906A
公开(公告)日：1992-02-25
申请号：US452929
申请日：1989-12-18
CPC分类号： H04W84/08 , H04W4/10 , H04W76/005 , Y10S370/913
摘要： A method for interrupting a radio transmission in a quasi-duplex radio-frequency communication system. The method of the present invention includes the step of transmitting a signal (22), with periodically-occuring holes (24) therein, by a first communicatioin unit (10) to at least a second communication unit (12). The transmitted signal (12) includes an audio information portion (16) and information packets (23). Each information packet (23) specifies the time of occurence of the next hole (24). The second communication unit (12) initiates an interruption of the transmission made by the first communication unit (10) by transmitting an interrupt request signal (31) to the first communication unit (10) at a time specified by an information packet (23) received by the second communication unit (12). When the first communication unit (10) receives the interrupt request signal (31), it processes the interrupt request signal (23) to determine whether it complies with predetermined criteria. If the first communication unit determines that the interrupt request signal complies with the predetermined criteria, it transmits an acknowledgement signal allowing the second communication unit (12) to interrupt the transmission so that the second communication unit (12) may begin transmitting information to be received by at least the first communication unit (10).
摘要翻译： 一种用于在准双工射频通信系统中中断无线电传输的方法。 本发明的方法包括通过第一通信单元（10）向至少第二通信单元（12）发送周期性地发生孔（24）的信号（22）的步骤。 发送信号（12）包括音频信息部分（16）和信息分组（23）。 每个信息包（23）指定下一个孔（24）的发生时间。 第二通信单元（12）通过在由信息分组（23）指定的时间向第一通信单元（10）发送中断请求信号（31）来发起由第一通信单元（10）进行的发送的中断， 由第二通信单元（12）接收。 当第一通信单元（10）接收到中断请求信号（31）时，处理中断请求信号（23）以确定其是否符合预定标准。 如果第一通信单元确定中断请求信号符合预定标准，则它发送允许第二通信单元（12）中断传输的确认信号，使得第二通信单元（12）可以开始发送要接收的信息 至少第一通信单元（10）。
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公开(公告)号：US5945948A
公开(公告)日：1999-08-31
申请号：US706751
申请日：1996-09-03
CPC分类号： H04W64/00 , G01S5/021 , G01S5/0215 , G01S5/04 , G01S5/12 , G01S5/0294
摘要： A method for determining a subscriber unit location in a communication system is provided. The method includes the steps of receiving a signal from the subscriber unit at a first base station, determining a first receive time of the signal based on a sequence of spreading symbols at the first base station, determining a first angle of arrival of the signal at the first base station, and determining the location of the subscriber unit from the first receive time, the first angle of arrival, and further predetermined information about the first base station. The signal is formed via modulation by the sequence of spreading symbols.
摘要翻译： 提供了一种用于确定通信系统中的用户单元位置的方法。 该方法包括以下步骤：在第一基站从用户单元接收信号，基于第一基站处的扩展符号序列确定信号的第一接收时间，确定信号的第一到达角度 第一基站，以及从第一接收时间，第一入射角度以及关于第一基站的其它预定信息确定用户单元的位置。 该信号通过扩展符号序列的调制形成。
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3.发明授权Method and apparatus for controlling a power level of a base station of a wireless communication system 失效用于控制无线通信系统的基站的功率电平的方法和装置
公开(公告)号：US5574984A
公开(公告)日：1996-11-12
申请号：US354297
申请日：1994-12-13
CPC分类号： H04W52/08 , H03G3/3042 , H04W52/12 , H04W52/20 , H04W52/225 , H04W52/24
摘要： After setting a base station to a transmit power level (12) which provides a signal at a subscriber unit having a target quality level, a fading characteristic of a communication channel between the subscriber unit and a base site is measured (13). The fading characteristic is then compared with a threshold value (14). The measuring (13) and comparing (14) are repeated until the fading characteristic crosses a threshold (15). Once the fading characteristic crosses the threshold for a receive Eb/No level that is representative of a e.g. static fading condition, the base transmit power that is transmitted to the subscriber is increased by a predetermined amount in anticipation of the need for an increased Eb/No for the case of a faded signal (61). The determination of the fading characteristic and threshold comparison may be performed at either the subscriber unit or the base station.
摘要翻译： 在将基站设置为在具有目标质量等级的用户单元提供信号的发射功率电平（12）之后，测量用户单元和基站之间的通信信道的衰落特性（13）。 然后将衰落特性与阈值（14）进行比较。 重复测量（13）和比较（14），直到衰落特性穿过阈值（15）。 一旦衰减特性越过代表例如接收Eb / No电平的接收Eb / No电平的阈值。 静态衰落条件下，发送给用户的基站发射功率增加预定量，预计在衰减信号（61）的情况下需要增加的Eb / No。 可以在用户单元或基站处执行衰落特性和阈值比较的确定。
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公开(公告)号：US5508708A
公开(公告)日：1996-04-16
申请号：US436760
申请日：1995-05-08
摘要： A method and apparatus for determining the location of a communication unit in a CDMA system includes in a first embodiment, sending a location request via a spread spectrum signal to the subscriber (140), and receiving in return a subscriber signal including a response message showing a receive time of a particular symbol of the base's spreading sequence and a transmit time of a particular symbol of the subscriber's spreading sequence. The base (130), along with other receiving base(s) (140), also receives a predetermined symbol of the subscriber spreading sequence, and each determines a respective receive time of the predetermined symbol. The received information is then processed, along with known base location and delay information, to determine the subscriber location. If insufficient number of bases are capable of communicating with the subscriber, for example due to high loading/interference, auxiliary bases (121) are also provided for receiving from or transmitting to the subscriber.
摘要翻译： 用于确定CDMA系统中的通信单元的位置的方法和装置包括在第一实施例中，经由扩展频谱信号向订户（140）发送定位请求，并且接收接收到包括响应消息的用户信号，该响应消息显示 基站扩展序列的特定符号的接收时间和用户扩频序列的特定符号的发送时间。 基站（130）以及其他接收基站（140）也接收用户扩频序列的预定符号，并且各自确定预定符号的相应接收时间。 然后接收的信息与已知的基本位置和延迟信息一起被处理以确定用户位置。 如果足够数量的基站能够与用户通信，例如由于高负载/干扰，辅助基站（121）也被提供用于从用户接收或传送给用户。
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公开(公告)号：US5371901A
公开(公告)日：1994-12-06
申请号：US207242
申请日：1994-03-04
摘要： A portable communication device (10) is controlled by voice recognition circuitry (20) remote from the portable communication device. The portable communication device includes apparatus for producing and transmitting a parametric representation of voice commands. The remote circuitry (which could possibly be a base station, a mobile repeater, or simply a dedicated box, separate from the portable) produces control signals, responsive to the parametric representation of voice commands, for controlling the portable communication device.
摘要翻译： 便携式通信设备（10）由远离便携式通信设备的语音识别电路（20）控制。 便携式通信设备包括用于产生和发送语音命令的参数表示的设备。 远程电路（其可能是基站，移动中继器或简单地与便携式设备分离的专用盒）产生响应于语音命令的参数表示的控制信号，用于控制便携式通信设备。
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公开(公告)号：US5319635A
公开(公告)日：1994-06-07
申请号：US987032
申请日：1992-12-07
摘要： A communication unit (10) transmits a first signal (12) that has a plurality of holes (44) therein during the occurrence of which another communication unit may interrupt. A repeater (14) receives the first signal and transmits a second signal (16) comprising the information in the first signal, and a plurality of digital coded squelch words synchronized with the holes to indicate the location of at least one of the holes in the first signal (i.e., the time at which at least one of the holes will occur). In one embodiment, each hole occurs after each pair of coded squelch words, and accordingly the pairs of coded squelch words are marked to indicate the times of occurrence of holes in the first signal.
摘要翻译： 通信单元（10）在发生另一通信单元可能中断的过程中发送其中具有多个孔（44）的第一信号（12）。 中继器（14）接收第一信号并发送包括第一信号中的信息的第二信号（16）以及与孔同步的多个数字编码静噪字，以指示在该第一信号中的至少一个孔的位置 第一信号（即，将发生至少一个孔的时间）。 在一个实施例中，每个孔在每对编码的静噪字之后发生，因此，编码的静噪字对被标记以指示在第一信号中出现孔的次数。
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公开(公告)号：US4748685A
公开(公告)日：1988-05-31
申请号：US917923
申请日：1986-10-10
CPC分类号： H02J7/0004 , H04W24/00 , H04W52/0238 , H04W52/028 , H04W8/26 , H04W84/10 , H04W88/02
摘要： A vehicle mounted mobile transceiver (11) communicates via a secondary mobile unit (51) with a short range portable unit (10). The portable unit (10) can be either a cordless microphone or a transceiver. The portable unit (10) allows a remotely positioned operator to transmit messages to a base station (13). To ensure security and reliable operation, the portable and vehicle mounted units use digitized codes for ID and instruction purposes. These codes are newly generated from time to time by the vehicle mounted unit and are imparted to the portable unit via a battery charging interface. An improved remote squelch detect is also provided. The improved remote squelch detect substitutes the normal input to the vehicle primary mounted mobile transceiver (11) squelch gate for an audio signal. The remote squelch detect can then detect the presence or absence of this input signal at the output of the audio PA for the vehicle mounted mobile transceiver, and this detection can be used to enable the secondary mobile unit to repeat the incoming message to the portable unit. With less delay than the prior art methods.
摘要翻译： 车载移动收发器（11）经由次级移动单元（51）与短距离便携式单元（10）进行通信。 便携式单元（10）可以是无绳麦克风或收发器。 便携式单元（10）允许远程定位的操作员向基站（13）发送消息。 为了确保安全可靠的运行，便携式和车载装置使用数字化代码进行ID和指令目的。 这些代码是由车载单元不时新产生的，并通过电池充电接口传递给便携式单元。 还提供了改进的远程静噪检测。 改进的远程静噪检测将普通输入替换为车辆主安装的移动收发机（11）静音门以用于音频信号。 远程静噪检测器可以在车载移动收发器的音频PA的输出处检测该输入信号的存在或不存在，并且该检测可用于使辅助移动单元能够将输入消息重复到便携式单元 。 具有比现有技术方法更少的延迟。
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8.发明授权Method and apparatus for correcting a measured round-trip delay time in a wireless communication system 失效用于在无线通信系统中校正测量的往返延迟时间的方法和装置
公开(公告)号：US5974057A
公开(公告)日：1999-10-26
申请号：US941783
申请日：1997-09-30
IPC分类号： H04B1/7115 , H04B7/01 , H04B17/00 , H04J3/06 , H04L7/00
CPC分类号： H04J3/0682 , H04B17/364 , H04B1/7115
摘要： Correction of a round-trip delay within a communication system (100) takes place by receiving an uplink communication signal (119) over uplink communication signal paths (130-132) and determining what ray was utilized by a remote unit (113) in time aligning the uplink communication signal (119). In particular, a base station (101) analyzes the uplink communication signal (119) and predicts the ray that the remote unit (113) utilized for time alignment. Once the base station (101) has determined the ray that the remote unit (113) utilized in time alignment, the base station (101) corrects any calculation of round-trip delay accordingly.
摘要翻译： 通过在上行链路通信信号路径（130-132）上接收上行链路通信信号（119）并且及时确定远程单元（113）利用的射线来进行通信系统（100）内的往返延迟的校正 对准上行链路通信信号（119）。 特别地，基站（101）分析上行链路通信信号（119），并且预测用于时间对准的远程单元（113）的射线。 一旦基站（101）已经确定了远程单元（113）在时间对准中使用的射线，则基站（101）相应地校正往返延迟的任何计算。
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公开(公告)号：US4703520A
公开(公告)日：1987-10-27
申请号：US925768
申请日：1986-10-31
CPC分类号： H03L7/146 , H03D3/242 , H03D7/163 , H03J5/0272 , H04B1/405 , H03D2200/0096
摘要： A reference oscillator (21) suitable for use in a radio transceiver having a phase locked loop FM detector (12). During normal reception operation, the reference oscillator (21) can be controlled in closed loop manner through use of a phase locked loop that responds, in part, to the lock frequency of the FM detector phase locked loop. During transmit functions, or during other periods when the closed loop control may not provide accurate reference oscillator (21) operation, open loop control can be provided instead. Open loop control includes use of a stored value that reflects a most recent reliable value of an appropriate input control signal for the reference oscillator (21).
摘要翻译： 一种适用于具有锁相环FM检测器（12）的无线电收发器中的参考振荡器（21）。 在正常的接收操作期间，参考振荡器（21）可以通过使用一部分响应FM检波器锁相环锁定频率的锁相环以闭环方式进行控制。 在发送功能期间，或者在闭环控制可能不能提供精确的基准振荡器（21）操作的其他周期期间，可以提供开环控制。 开环控制包括使用反映针对参考振荡器（21）的适当输入控制信号的最新可靠值的存储值。
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10.发明授权公开(公告)号：US06173005B2
公开(公告)日：2001-01-09
申请号：US08923190
申请日：1997-09-04
IPC分类号： H04B1707
CPC分类号： H04B7/0671 , H04J13/0048 , H04L1/02 , H04W52/34 , H04W52/42
摘要： Orthogonal transmit diversity is implemented by employing a data splitter (803) to subdivide channel information (801) into at least a first portion of bits (802) and a second portion of bits (804). Each portion is spread with its own Walsh code for eventual transmission to a mobile station via a predetermined carrier frequency. When the number of bits in the first and second portion (802, 804) are small, separate Walsh codes are used to maintain orthogonality. When the number of bits in the first and second portion (802, 804) are relatively large, a time-division multiplex transmission is used to maintain orthogonality. A controller (809) controls the subdivision of the channel information and also an interleaver (308) to further enhance the effects of the diversity transmission. Control information related to the subdivision is transmitted to the mobile station so the channel information can be accurately reconstructed prior to decoding.
摘要翻译： 通过采用数据分离器（803）将信道信息（801）细分为比特（802）和比特（804）的第二部分的至少第一部分来实现正交发射分集。 每个部分用自己的沃尔什码扩展，以便经由预定的载波频率最终传输到移动台。 当第一和第二部分（802,804）中的比特数较少时，使用单独的沃尔什码来维持正交性。 当第一和第二部分（802,804）中的位数相对较大时，使用时分复用传输来保持正交性。 控制器（809）控制信道信息的细分以及交织器（308），以进一步增强分集传输的影响。 将与细分相关的控制信息发送到移动台，使得可以在解码之前准确地重构信道信息。
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