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公开(公告)号：US5712868A
公开(公告)日：1998-01-27
申请号：US906785
申请日：1992-06-30
申请人： Morton Stern , John S. Csapo , David Edward Borth , Charles N. Lynk, Jr. , John Richard Haug , Eric R. Schorman , Phillip David Rasky , Walter Joseph Rozanski, Jr.
发明人： Morton Stern , John S. Csapo , David Edward Borth , Charles N. Lynk, Jr. , John Richard Haug , Eric R. Schorman , Phillip David Rasky , Walter Joseph Rozanski, Jr.
CPC分类号： H04B7/2643 , H04W88/10
摘要： The dual mode communication network comprises a first communication system having a frame structure and a first traffic channel protocol and a second communication system having the frame structure and a second traffic channel protocol. In the network, only one of the first and second traffic channel protocols supports forward error correction coding.
摘要翻译： 双模式通信网络包括具有帧结构和第一业务信道协议的第一通信系统和具有帧结构和第二业务信道协议的第二通信系统。 在网络中，第一和第二业务信道协议中只有一个支持前向纠错编码。
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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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3.发明授权Transmission trunked radio system with voice buffering and off-line dialing 失效具有语音缓冲和离线拨号的传输集群无线电系统
公开(公告)号：US4821310A
公开(公告)日：1989-04-11
申请号：US136601
申请日：1987-12-22
IPC分类号： H04L12/56 , H04W4/10 , H04W4/12 , H04W28/14 , H04W72/04 , H04W74/00 , H04W76/02 , H04W84/08 , H01Q7/04
CPC分类号： H04W72/044 , H04W76/02 , H04W84/08 , H04W28/14 , H04W4/10 , H04W4/12 , H04W72/04 , H04W72/0413 , H04W74/00 , H04W76/005
摘要： A trunked radio subscriber requesting dispatch service transmits a request for a channel and immediately begins to speak without waiting to receive permission to access the channel. The subscriber radio locally records the information to be transmitted and, upon being assigned a channel, begins to reproduce and transmit the information. Recording and reproduction provides delay to span the time between request for and assignment to a channel and eliminates the need for the subscriber to wait to transmit or to quickly seize a channel assigned after an initial refusal. This enhances overall response time and increases time available for transmitting information signals. During interconnect calling, a trunked system alternately assigns inbound and outbound frequencies only as required for back-and-forth communication between simplex radio and duplex wireline subscribers. Voice buffering allows the parties to begin talking during the delay between request for and assignment of frequencies. The invention further provides for call origination by either radio or wireline subscribers without use of information channels. These procedures release resources and make them available to other callers.
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4.发明授权Apparatus and method for adapting a digital radiotelephone system to increased subscriber traffic 失效用于使数字无线电话系统适应于增加的用户业务的装置和方法
公开(公告)号：US5649299A
公开(公告)日：1997-07-15
申请号：US144166
申请日：1993-10-27
CPC分类号： H04W88/181 , G10L19/00 , H04J3/1688
摘要： A digital radiotelephone system employs vocoders to convert between analog speech and a digital format suitable for transmission via radio. Under most circumstances, the highest data rate is selected for optimum audio quality. When the system occupancy exceeds a particular threshold, as detected at the fixed site of the system, some or all of the vocoders are instructed to switch to a lower data rate to provide for an increase in the number of communication channels. Further, a portable subscriber unit may autonomously change its vocoder data rate depending upon the charge state of its battery.
摘要翻译： 数字无线电话系统使用声码器在模拟语音和适合于通过无线电传输的数字格式之间进行转换。 在大多数情况下，选择最高数据速率以获得最佳音频质量。 当系统占用率超过特定阈值时，如在系统的固定站点处检测到的，指示部分或全部声码器切换到较低的数据速率以提供通信信道数量的增加。 此外，便携式用户单元可以根据其电池的充电状态自主地改变其声码器数据速率。
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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：US5249305A
公开(公告)日：1993-09-28
申请号：US705875
申请日：1991-05-28
申请人： Alfred B. Wieczorek , Charles N. Lynk, Jr. , Walter J. Rozanski, Jr. , Kenneth J. Zdunek , Terry K. Mansfield
发明人： Alfred B. Wieczorek , Charles N. Lynk, Jr. , Walter J. Rozanski, Jr. , Kenneth J. Zdunek , Terry K. Mansfield
摘要： A radio communication system including a control station and at least one remote station (20) is provided. The control station has a receiver for receiving radio signals, a transmitter for transmitting radio signals and a demodulator for measuring the frequency of the received signals. Responsive to a request for frequency measurement received from the receiver, the control station also has an error signal encoder to provide an error feedback signal containing the polarity and magnitude of the frequency difference for transmission by the transmitter. At least one remote station (20) has a receiver (25), a transmitter (26), a frequency controller (46), an encoder for encoding the request for frequency measurement and for actuating the transmitter (26) to transmit the request, and a decoder (34), responsive to the received error feedback signal for adjusting the frequency control.
摘要翻译： 提供了包括控制站和至少一个远程站（20）的无线电通信系统。 控制站具有用于接收无线电信号的接收机，用于发送无线电信号的发射机和用于测量接收信号的频率的解调器。 响应于从接收机接收的对频率测量的请求，控制站还具有误差信号编码器，以提供包含用于发射机发射的频差的极性和幅度的误差反馈信号。 至少一个远程站（20）具有接收机（25），发射机（26），频率控制器（46），用于编码频率测量请求并用于致动发射机（26）传送请求的编码器， 以及解码器（34），响应于所接收的误差反馈信号来调整频率控制。
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公开(公告)号：US4553263A
公开(公告)日：1985-11-12
申请号：US564855
申请日：1983-12-22
CPC分类号： H04W84/00
摘要： A remote unit which transmits and receives messages within a fleet of remote units on a single communications channel shared by a plurality of remote unit fleets is disclosed. Access to the channel is regulated by a central control station which transmits control signals on the channel. To obtain service, a remote unit transmits a request synchronized by one of the control signals. Upon receiving a grant of service from the central control station, the remote unit may transmit a message to its fleet. At the conclusion of the message, an end-of-transmission condition is indicated by the remote unit.
摘要翻译： 公开了在由多个远程单元队列共享的单个通信信道上在远程单元的群集内发送和接收消息的远程单元。 对通道的访问由在信道上发送控制信号的中央控制站进行调节。 为了获得服务，远程单元发送由控制信号之一同步的请求。 在从中央控制站接收到服务授权时，远程单元可以向其舰队发送消息。 在消息结束时，远程单元指示传输结束条件。
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公开(公告)号：US3962553A
公开(公告)日：1976-06-08
申请号：US518827
申请日：1974-10-29
摘要： A battery saving system for a portable duplex communications system such as a portable telephone system includes a voice operated transmitter within each portable unit which automatically transmits radio signals upon application of audio signals thereto and discontinues transmission upon termination of the audio signals to conserve battery power. A companion receiver includes a fast acting squelch system to substantially eliminate the noise bursts occurring between transmissions by said portable unit.
摘要翻译： 用于诸如便携式电话系统的便携式双工通信系统的电池节省系统包括在每个便携式单元内的语音操作的发射机，其在施加音频信号时自动发送无线电信号，并且在音频信号终止时中止传输以节省电池电力。 伴随接收机包括快速静噪系统，以基本上消除由所述便携式单元发射之间发生的噪声突发。
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9.发明授权Method and apparatus for controlling a peak envelope power of a power amplifier 失效用于控制功率放大器的峰值包络功率的方法和装置
公开(公告)号：US5854571A
公开(公告)日：1998-12-29
申请号：US144931
申请日：1993-10-28
CPC分类号： H03G3/3042 , H03G3/3047
摘要： An apparatus and method of reducing a peak envelope power of a linear power amplifier (10) amplifying a plurality of channels is provided. The method includes the steps of measuring (104) the peak envelope power of the linear power amplifier, measuring a channel activity level (101) of each channel of the plurality of channels, and, when the peak envelope power exceeds a first threshold, changing (103, 106) at least one parameter of a channel of the plurality of channels having a channel activity level exceeding a second threshold to reduce the peak envelope power.
摘要翻译： 提供了一种降低放大多个通道的线性功率放大器（10）的峰值包络功率的装置和方法。 该方法包括以下步骤：测量（104）线性功率放大器的峰值包络功率，测量多个信道中的每个信道的信道活动水平（101），并且当峰值包络功率超过第一阈值时，改变 （103,106），所述多个通道的通道的至少一个参数具有超过第二阈值的通道活动水平以减小峰值包络功率。
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10.再颁专利
公开(公告)号：USRE32789E
公开(公告)日：1988-11-22
申请号：US548793
申请日：1983-11-04
IPC分类号： H04W84/08
CPC分类号： H04W84/08
摘要： A communication system of the type wherein a central station assigns a limited number of information channels to a requesting one of a plurality of remote stations is disclosed. The requesting station sends its identification signal along with the request signal to the central station on a signal channel. The central station classifies the requesting station in either a priority or a non-priority queue. The priority queue corresponds to those stations which are continuing an on-going interchange, whereas the nonpriority queue contains those stations which wish to initiate an interchange. Stations are prioritized in the queues on a first-in/first-out basis.The central station constantly monitors the information channels and, as channels become available, assigns the channels first to stations in the priority queue, then to nonpriority queue stations. A channel becomes "available" when the central station detects a pause, such as a momentary release of a push to talk microphone switch, in transmission of that channel. By this transmission trunking method, the system makes optimum use of the limited number of available channels.Additional central station processing provides an acknowledgement signal, which indicates that the request was received and a channel will be assigned as soon as one becomes available. Also, the identification of a requesting station is compared with an associate memory. The memory provides the identifications of all stations to whom the requesting station would transmit. Once a channel is available, it is assigned to the requesting station and to its associated stations, whereby the associated stations are notified of, and prepared for, the impending transmission.
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