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. 发明授权

US5991332A Adaptive matched filter and vector correlator for a code division multiple access (CDMA) modem 失效
标题翻译：用于码分多址（CDMA）调制解调器的自适应匹配滤波器和矢量相关器
公开(公告)号：US5991332A
公开(公告)日：1999-11-23
申请号：US24473
申请日：1998-02-17
申请人： Gary Lomp , Fatih Ozluturk , Avi Silverberg
发明人： Gary Lomp , Fatih Ozluturk , Avi Silverberg
IPC分类号： H03K3/84 , G06F13/374 , H03H17/02 , H03H17/06 , H04B1/707 , H04B1/7075 , H04B1/7077 , H04B1/708 , H04B1/7085 , H04B1/709 , H04B1/7093 , H04B1/711 , H04B1/7115 , H04B1/712 , H04B7/005 , H04B7/216 , H04B7/26 , H04B15/00 , H04B17/00 , H04J11/00 , H04J13/00 , H04J13/10 , H04J13/12 , H04J13/16 , H04K1/00 , H04L1/00 , H04L5/14 , H04L7/00 , H04L7/033 , H04L25/02 , H04L27/00 , H04L27/20 , H04L27/233 , H04L27/30 , H04N1/333 , H04W52/04 , H04W52/14 , H04W52/24
CPC分类号： H04B7/2637 , G06F13/374 , H03H17/0226 , H04B1/707 , H04B1/7075 , H04B1/70753 , H04B1/70754 , H04B1/70755 , H04B1/70758 , H04B1/708 , H04B1/7085 , H04B1/709 , H04B1/7093 , H04B1/711 , H04B7/2628 , H04J13/00 , H04J13/10 , H04J13/107 , H04L1/004 , H04L1/0042 , H04L1/0059 , H04L25/0212 , H04L27/206 , H04L27/2332 , H04L5/1446 , H04N1/00912 , H04N1/3333 , H04W52/04 , H04W52/08 , H04W52/143 , H04W52/24 , H04W52/241 , H04W52/245 , H04W52/262 , H04W52/322 , H04W52/325 , H04W52/343 , H04W52/346 , H04W52/36 , H04W52/50 , H04W52/52 , H04W52/54 , H03H17/06 , H04B1/7077 , H04B1/7115 , H04B1/712 , H04B2201/70701 , H04B2201/70702 , H04B2201/70703 , H04B2201/70707 , H04B2201/7071 , H04B7/264 , H04J13/004 , H04J13/0048 , H04J13/0077 , H04J13/12 , H04J13/16 , H04J2013/0037 , H04L1/0001 , H04L1/0047 , H04L1/0054 , H04L2027/003 , H04L2027/0053 , H04N2201/3335 , H04W52/146 , H04W52/247 , H04W52/26 , H04W52/367 , H04W52/44 , H04W52/60 , Y02B60/1228 , Y02B60/50
摘要： A CDMA modem includes a modem transmitter having: a code generator which provides an associated pilot code signal and which generates a plurality of message code signals: a spreading circuit which produces a spread-spectrum message signal by combining each of the information signals with a respective one of the message code signals; and a global pilot code generator that provides a global pilot code signal to which the message code signals are synchronized. The CDMA modem also includes a modem receiver having an associated pilot code generator and a group of associated pilot code correlators for correlating code-phase delayed versions of the associated pilot signal with a receive CDM signal to produce a despread associated pilot signal. The code phase of the associated pilot signal is changed responsive to an acquisition signal value until a pilot signal is received. The associated pilot code tracking logic adjusts the associated pilot code signal in phase responsive to the acquisition signal so that the signal power level of the despread associated pilot code signal is maximized. Finally, the CDMA modem receiver includes a group of message signal acquisition circuits, each including a plurality of receive message signal correlators which correlate respective local received message code signal to the CDM signal to produce a respective despread received message signal.
摘要翻译： CDMA调制解调器包括：调制解调器发射机，具有：代码生成器，其提供相关联的导频代码信号并产生多个消息代码信号：扩展电路，其通过将每个信息信号与相应的信息信号组合来产生扩频消息信号消息码信号之一; 以及提供消息代码信号同步的全局导频码信号的全局导频码发生器。 CDMA调制解调器还包括具有相关联的导频码发生器和一组相关联的导频码相关器的调制解调器接收机，用于将相关导频信号的码相位延迟版本与接收CDM信号相关，以产生解扩相关导频信号。相应的导频信号的码相位响应于采集信号值而改变，直到接收到导频信号。相关联的导频代码跟踪逻辑响应于采集信号相位调整相关联的导频代码信号，使得解扩相关导频码信号的信号功率电平最大化。最后，CDMA调制解调器接收机包括一组消息信号采集电路，每组包括多个接收消息信号相关器，它将相应的本地接收到的消息码信号与CDM信号相关联，以产生相应的解扩接收消息信号。

62. 发明授权

US5991329A Automatic power control system for a code division multiple access (CDMA) communications system 失效
标题翻译：用于码分多址（CDMA）通信系统的自动功率控制系统
公开(公告)号：US5991329A
公开(公告)日：1999-11-23
申请号：US669770
申请日：1996-06-27
申请人： Gary Lomp , Fatih Ozluturk , John Kowalski
发明人： Gary Lomp , Fatih Ozluturk , John Kowalski
IPC分类号： H03K3/84 , G06F13/374 , H03H17/02 , H03H17/06 , H04B1/707 , H04B1/7075 , H04B1/7077 , H04B1/708 , H04B1/7085 , H04B1/709 , H04B1/7093 , H04B1/711 , H04B1/7115 , H04B1/712 , H04B7/005 , H04B7/216 , H04B7/26 , H04B15/00 , H04B17/00 , H04J11/00 , H04J13/00 , H04J13/10 , H04J13/12 , H04J13/16 , H04K1/00 , H04L1/00 , H04L5/14 , H04L7/00 , H04L7/033 , H04L25/02 , H04L27/00 , H04L27/20 , H04L27/233 , H04L27/30 , H04N1/333 , H04W52/04 , H04W52/14 , H04W52/24 , H04B1/69
CPC分类号： H04B7/2637 , G06F13/374 , H03H17/0226 , H04B1/707 , H04B1/7075 , H04B1/70753 , H04B1/70754 , H04B1/70755 , H04B1/70758 , H04B1/708 , H04B1/7085 , H04B1/709 , H04B1/7093 , H04B1/711 , H04B7/2628 , H04J13/00 , H04J13/10 , H04J13/107 , H04L1/004 , H04L1/0042 , H04L1/0059 , H04L25/0212 , H04L27/206 , H04L27/2332 , H04L5/1446 , H04N1/00912 , H04N1/3333 , H04W52/04 , H04W52/08 , H04W52/143 , H04W52/24 , H04W52/241 , H04W52/245 , H04W52/262 , H04W52/322 , H04W52/325 , H04W52/343 , H04W52/346 , H04W52/36 , H04W52/50 , H04W52/52 , H04W52/54 , H03H17/06 , H04B1/7077 , H04B1/7115 , H04B1/712 , H04B2201/70701 , H04B2201/70702 , H04B2201/70703 , H04B2201/70707 , H04B2201/7071 , H04B7/264 , H04J13/004 , H04J13/0048 , H04J13/0077 , H04J13/12 , H04J13/16 , H04J2013/0037 , H04L1/0001 , H04L1/0047 , H04L1/0054 , H04L2027/003 , H04L2027/0053 , H04N2201/3335 , H04W52/146 , H04W52/247 , H04W52/26 , H04W52/367 , H04W52/44 , H04W52/60 , Y02B60/1228 , Y02B60/50
摘要： An automatic power control (APC) system for a spread-spectrum communications system includes an automatic forward power control (AFPC) system, and an automatic reverse power control (ARPC) system. In the AFPC, each subscriber unit (SU) measures a forward signal-to-noise ratio of a respective forward channel information signal to generate a respective forward channel error signal which includes a measure of the uncorrelated noise in the channel and a measure of the error between the respective forward signal-to-noise ratio and a pre-determined signal-to-noise value. A control signal generated from the respective forward channel error signal is transmitted as part of a respective reverse channel information signal. A base unit includes AFPC receivers which receive respective reverse channel information signals and extract the forward channel error signals therefrom to adjust the power levels of the respective forward spread-spectrum signals. In the ARPC system, each base measures a reverse signal-to-noise ratio of each of the respective reverse channel information signals and generates a respective reverse channel error signal which includes a measure of the uncorrelated noise in the channel and a measure of the error between the respective reverse signal-to-noise ratio and a pre-determined signal-to-noise value. The base unit transmits a control signal generated from the respective reverse channel error signal as a part of a respective forward channel information signal. Each SU includes an ARPC receiver which receives the forward channel information signal and extracts the respective reverse error signal to adjust the reverse transmit power level of the respective reverse spread-spectrum signal.
摘要翻译：用于扩频通信系统的自动功率控制（APC）系统包括自动正向功率控制（AFPC）系统和自动反向功率控制（ARPC）系统。在AFPC中，每个用户单元（SU）测量相应的前向信道信息信号的正向信噪比，以产生相应的前向信道误差信号，该信道误差信号包括信道中不相关噪声的量度，相应的正向信噪比和预定信噪比之间的误差。从相应的正向信道误差信号产生的控制信号作为相应的反向信道信息信号的一部分被发送。基本单元包括AFPC接收机，其接收相应的反向信道信息信号并从其中提取前向信道误差信号，以调整各个正向扩频信号的功率电平。在ARPC系统中，每个基站测量各个反向信道信息信号中的每一个的反向信噪比并产生相应的反向信道误差信号，该反向信道误差信号包括信道中不相关噪声的量度和误差的量度在相应的反向信噪比和预定信号噪声之间。基本单元发送从各个反向信道误差信号生成的控制信号作为各个前向信道信息信号的一部分。每个SU包括ARPC接收机，其接收前向信道信息信号并提取相应的反向误差信号以调整相应的反向扩频信号的反向发射功率电平。

63. 发明授权

US5982810A Signal extraction circuit and correlator utilizing the circuit 失效
标题翻译：信号提取电路和相关器利用电路
公开(公告)号：US5982810A
公开(公告)日：1999-11-09
申请号：US831772
申请日：1997-04-02
申请人： Eiji Nishimori
发明人： Eiji Nishimori
IPC分类号： H04B1/707 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/7093 , H04B1/709
摘要： A correlator used for spread spectrum communications which reduces consumed power. A signal extraction circuit (6) is provided for directly extracting phase information from an input signal which expresses two values of code data by each phase of a plurality of cycles. A signal transferring circuit (1) is connected to the signal extraction circuit (6) for transferring the phase information to a multiplying circuit (2) comprised of a plurality of multipliers. Signals in each cell of the signal transferring circuit (1) are multiplied by fixed coefficients within the multiplying circuit (2) and supplied to an adding circuit (3) for determination of a correlation peak value.
摘要翻译：用于扩频通信的相关器，可降低功耗。提供信号提取电路（6），用于从通过多个周期的每个相位表示代码数据的两个值的输入信号直接提取相位信息。信号传送电路（1）连接到信号提取电路（6），用于将相位信息传送到由多个乘法器组成的乘法电路（2）。在信号传送电路（1）的每个单元中的信号乘以乘法电路（2）内的固定系数，并提供给用于确定相关峰值的加法电路（3）。

64. 发明授权

US5978411A Synchronizer for receiver of spread spectrum communication apparatus 失效
标题翻译：用于扩频通信装置的接收机的同步器
公开(公告)号：US5978411A
公开(公告)日：1999-11-02
申请号：US822595
申请日：1997-03-20
申请人： Takashi Kitade , Taku Nagase
发明人： Takashi Kitade , Taku Nagase
IPC分类号： H04B1/707 , H04B1/7085 , H04L7/00 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/70755 , H04B1/70756
摘要： A search unit of a receiver synchronizer includes a search PN signal generator for generating PN signals for all PN phases in order to search the maximum power path; a search correlation unit which outputs a correlation value from sampling data and the PN signal; a data buffer for storing the correlation value; a path search unit for controlling a search the path using the correlation value received from the data buffer; a PN signal generator for outputting a PN signal to a DLL and a data demodulation correlation device; and a DLL switch for switching the PN phase to the phase of the maximum power path by controlling the PN signal generator as a result of the search for the path. The PN phase of the PN signal output to the DLL is constantly maintained in synchronization with the phase of the maximum power path.
摘要翻译：接收机同步器的搜索单元包括搜索PN信号发生器，用于产生用于所有PN相位的PN信号，以搜索最大功率路径; 搜索相关单元，其从采样数据和PN信号输出相关值; 用于存储相关值的数据缓冲器; 路径搜索单元，用于使用从数据缓冲器接收的相关值来控制搜索路径; 用于向DLL输出PN信号的PN信号发生器和数据解调相关装置; 以及DLL开关，用于通过搜索路径来控制PN信号发生器来将PN相切换到最大功率路径的相位。输出到DLL的PN信号的PN相位与最大功率路径的相位保持恒定。

65. 发明授权

US5956369A Spread spectrum multipath combining subsystem and method 失效
标题翻译：扩频多径组合子系统和方法
公开(公告)号：US5956369A
公开(公告)日：1999-09-21
申请号：US806013
申请日：1997-02-24
申请人： Sorin Davidovici , Jimmy Cuong Tran , Donald L. Schilling
发明人： Sorin Davidovici , Jimmy Cuong Tran , Donald L. Schilling
IPC分类号： H04B1/7093 , H04B1/7115 , H04B1/712 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/7093 , H04B1/7115 , H04B1/712
摘要： A multipath-combining subsystem for receiving a spread-spectrum signal arriving from a plurality of paths. A header-matched filter detects each match, within each path, of a header-chip-sequence signal with a first impulse response and outputs a header-detection signal having a header amplitude and a respective chip location. A data-matched filter detects at the respective chip location of each header-detection signal, a respective data-chip-sequence signal and outputs a data-detection signal having a data amplitude. A combiner multiplies the header amplitude of each header-detection signal and the data amplitude of the respective data symbol to generate a plurality of weighted elements for each data symbol. The combiner then adds the plurality of weighted elements for each data symbol as a sum signal of the respective data symbol.
摘要翻译：一种用于接收从多个路径到达的扩频信号的多路径组合子系统。标题匹配滤波器在每个路径内检测具有第一脉冲响应的标题片段序列信号的每个匹配，并且输出具有报头幅度和相应芯片位置的报头检测信号。数据匹配滤波器在每个标题检测信号的相应芯片位置检测相应的数据芯片序列信号，并输出具有数据幅度的数据检测信号。组合器将每个报头检测信号的报头幅度和相应数据符号的数据幅度相乘，以产生每个数据符号的多个加权元素。然后，组合器将每个数据符号的多个加权元素作为相应数据符号的和信号相加。

66. 发明授权

US5953370A Apparatus for receiving and correlating a spread spectrum signal 失效
标题翻译：用于接收和关联扩频信号的装置
公开(公告)号：US5953370A
公开(公告)日：1999-09-14
申请号：US928846
申请日：1997-09-12
申请人： Randolph L. Durrant , Mark Burbach
发明人： Randolph L. Durrant , Mark Burbach
IPC分类号： H04B1/707 , H04B1/708 , H04B1/709 , H04B1/7093 , H04J13/10 , H04J14/00 , H04L27/20 , H04L27/227 , H04L27/233 , H04L27/30
CPC分类号： H04B1/708 , H04B1/707 , H04B1/709 , H04J13/10 , H04L27/2014 , H04L27/2278 , H04L27/2332 , H04B1/7093 , H04B2201/70701 , H04J14/005
摘要： A spread spectrum receiver for demodulating a CPM spread spectrum signal receives burst comprising a preamble and a data message that have been transmitted by M-ary encoding of a data signal into a single chip stream, dividing the chip stream into I and Q signal streams, independently modulating the I and Q signal streams, and superposing the resultants for transmission. The receiver detects the preamble using a non-coherent parallel correlator, and from the preamble correlation peak generates a series of integration periods for serial non-coherent correlation. A bank of non-coherent, serial correlators operate in parallel to recover the spread spectrum encoded information. For each of M spread spectrum codes, the receiver simultaneously attempts to correlate the non-preamble portion of the received spread spectrum signal by separating, the received signal into real and imaginary parts, correlating both real and imaginary parts for I and Q sequences, and combining the real I, real Q, imaginary I, and imaginary Q correlation signals into a unified correlation signal. The maximum of the unified correlation signals from the non-coherent, serial correlators dictates the content of the data stream for each integration period. The local clock reference signal in the receiver need not be frequency or phase matched with the clock of the transmitter in order to carry out the integration and recovery of the data stream.
摘要翻译：用于解调CPM扩展频谱信号的扩频接收机接收脉冲串，其包括已经通过数据信号的M进制编码发送的前导码和数据消息到单个码片流中，将码片流分为I和Q信号流，独立地调制I和Q信号流，并叠加输出的输出。接收机使用非相干并行相关器检测前导码，并且从前导码相关峰值产生用于串行非相干相关的一系列积分周期。一组非相干的串行相关器并行操作以恢复扩频编码信息。对于M个扩频码中的每一个，接收机同时尝试通过将接收到的信号分为实部和虚部来将I和Q序列的实部和虚部相关，并且将接收到的扩频信号的非前同步码部分相关联，将实际I，实际Q，虚数I和虚数Q相关信号组合成统一的相关信号。来自非相干串行相关器的统一相关信号的最大值指示每个积分周期的数据流的内容。接收机中的本地时钟参考信号不需要与发射机的时钟频率或相位匹配，以便执行数据流的集成和恢复。

67. 发明授权

US5940435A Method for compensating filtering delays in a spread-spectrum receiver 失效
标题翻译：补偿扩频接收机滤波延迟的方法
公开(公告)号：US5940435A
公开(公告)日：1999-08-17
申请号：US78145
申请日：1998-05-13
申请人： Alan F. Hendrickson
发明人： Alan F. Hendrickson
IPC分类号： H04L1/24 , H04L7/02 , H04L7/033 , H04B15/00 , H04K1/00 , H04L27/14 , H04L27/30
CPC分类号： H04L1/24 , H04L7/0054 , H04L7/0334
摘要： A method for configuring the receiver with an IF delay value that indicates the timing of symbol transitions in a received signal processed by the receiver. The receiver recovers a timing that has the same period as the symbol period, but which is out of phase with the received symbols. The received symbols are members of a constellation with elements that have purely I or purely Q components. A symbol-quality signal is generated by constructing the quantity .vertline..vertline.I.vertline.-.vertline.Q.vertline..vertline.. This quantity is a maximum when the detected symbols are aligned with the expected points in the symbol constellation, and decreases if the detected symbols are rotated away from these constellation points. The method determines an optimal delay value by which the symbol clock should be shifted from the recovered timing by using the symbol-quality signal to evaluate test delays and to successively refine them until the optimal delay value is found.
摘要翻译：一种用于配置具有IF延迟值的接收机的方法，所述IF延迟值指示由接收机处理的接收信号中的符号转换的定时。接收机恢复与符号周期具有相同周期但与接收到的符号不同步的定时。所接收的符号是具有纯I或纯Q分量的元素的星座的成员。通过构造量|| I | - | Q ||生成符号质量信号。当检测到的符号与符号星座中的预期点对准时，该量是最大值，如果检测到的符号从这些星座点旋转，则该量减小。该方法通过使用符号质量信号来评估测试延迟并且连续细化它们直到找到最佳延迟值来确定符号时钟应该从恢复的定时偏移的最佳延迟值。

68. 发明授权

US5930292A Method and apparatus for improved autocorrelation in biphase modulated pseudorandom noise coded systems using tri-state demodulation 失效
标题翻译：用于使用三态解调的双相调制伪随机噪声编码系统中的自相关改善的方法和装置
公开(公告)号：US5930292A
公开(公告)日：1999-07-27
申请号：US845225
申请日：1997-04-21
申请人： Carl Myron Willis
发明人： Carl Myron Willis
IPC分类号： H04B1/707 , H04B1/709 , H04L27/233 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/709 , H04B1/707 , H04L27/2334
摘要： The present invention describes a method and apparatus for improving the autocorrelation performance in spread spectrum radar and communications systems by using a tri-state digital correlator to demodulate the received biphase modulated waveform. The tri-state correlator (100) includes a multiplexer (112) having a code input for receiving a tri-state code sequence, and three inputs each for receiving a sequence of data words including a first input for receiving a digitized signal data word, a second input for receiving an inverted digitized signal data word, and a third input for receiving a zero data word. The multiplexer includes an output and a means for producing a sequence of data words at the output, said means presenting at the output exactly one of the three data words appearing at either the first, second, or third input depending on which of the three code states appears at the code input. The present invention also describes the manner in which the tri-state code sequence is constructed from a binary code sequence to effect a significant improvement in the autocorrelation performance.
摘要翻译：本发明描述了一种通过使用三态数字相关器来解调所接收的双相调制波形来改善扩频雷达和通信系统中的自相关性能的方法和装置。三态相关器（100）包括具有用于接收三态码序列的码输入的多路复用器（112），以及三个输入端，用于接收包括用于接收数字化信号数据字的第一输入端的数据字序列，用于接收反转数字化信号数据字的第二输入端和用于接收零数据字的第三输入端。多路复用器包括输出端和用于在输出端产生一系列数据字的装置，所述装置在输出端呈现三个数据字中的一个，出现在第一，第二或第三输入端，取决于三个代码中的哪一个状态出现在代码输入。本发明还描述了由二进制码序列构成三态码序列以实现自相关性能的显着提高的方式。

69. 发明授权

US5926508A Communication scheme using non-coherent frequency detection of trellis-based coding of plural transmission frequencies per baud 失效
标题翻译：使用非相干频率检测的每个波特率的多个传输频率的基于网格编码的通信方案
公开(公告)号：US5926508A
公开(公告)日：1999-07-20
申请号：US391965
申请日：1995-02-21
申请人： Larry W. Koos , William M. Koos, Jr. , Peter E. Mallory
发明人： Larry W. Koos , William M. Koos, Jr. , Peter E. Mallory
IPC分类号： H04B7/185 , H04L1/00 , H04L27/30 , H04L27/28 , H04L5/12 , H04L23/02
CPC分类号： H04L1/0059 , H04L1/0054 , H04L27/30 , H04B7/18528
摘要： A reduced cost, robust data communication scheme for very small aperture terminal satellite communication systems combines non-coherent frequency detection and trellis-coded, multi-frequency modulation. The data code width is associated with the size of a multiple frequency set and the selection of a given combination of frequencies for transmission during a respective baud. One portion the data is convolutionally encoded and points to an orthogonal signal set associated with frequencies of a partitioned multiple frequency set. Another portion of the data identifies the frequency combination within the group pointed to by the one portion. The combined portions encode a multi-frequency transmission waveform. At the receiver, the multi-frequency tone sequence is detected by non-coherent frequency detection. For each baud, matched filters output a most likely set of frequencies transmitted during that baud, as soft decisions to a Viterbi decoder.
摘要翻译：针对非常小孔径终端卫星通信系统的成本低廉的数据通信方案，结合了非相干频率检测和网格编码的多频调制。数据代码宽度与多频率集合的大小和给定的频率组合的选择相关联，以在相应的波特率期间进行传输。数据的一部分进行卷积编码，并指向与分割的多频率集合的频率相关联的正交信号集。数据的另一部分标识由该部分指向的组内的频率组合。组合部分编码多频传输波形。在接收机处，通过非相干频率检测来检测多频调频序列。对于每个波特率，匹配滤波器输出在该波特率期间发送的最可能的一组频率，作为对维特比解码器的软判决。

70. 发明授权

US5870426A Grouping of spread spectrum acknowledgement pagers to minimize transmission collisions 失效
标题翻译：分组扩频确认寻呼机，以减少传输冲突
公开(公告)号：US5870426A
公开(公告)日：1999-02-09
申请号：US362246
申请日：1994-12-22
申请人： Hanoch Yokev , Haim Harel , Yehouda Meiman
发明人： Hanoch Yokev , Haim Harel , Yehouda Meiman
IPC分类号： G01S1/02 , G01S3/02 , G01S3/04 , G01S3/10 , G01S5/00 , G01S5/02 , G01S5/04 , G01S19/25 , G01S19/27 , H04B1/713 , H04B1/7156 , H04B7/26 , H04W64/00 , H04W84/02 , H04W88/02 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04W64/00 , G01S1/026 , G01S3/023 , G01S3/043 , G01S3/10 , G01S5/0009 , G01S5/021 , G01S5/04 , H04B1/713 , H04B1/7156 , H04B7/2681 , H04B7/2693 , H04L5/0053 , H04W84/025 , H04L5/0007 , H04L5/0062 , H04L5/0091 , H04W88/022
摘要： An acknowledgment paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgment paging over long distances. The acknowledgment paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area.
摘要翻译：描述了一种确认寻呼系统，其适合于寻呼网络的现有基础设施，并且在远距离执行确认寻呼的同时提供低成本的制造和低功率操作。确认寻呼系统由标准寻呼发射机和使用跳频扩频差分双相移键控通信响应寻呼的多个远程寻呼单元组成。多个寻呼机被分配给组，其中每个组被分配在确定跳频的公共重复伪随机噪声码中的单独的起始位置。寻呼机的分组使组之间的确认传输的冲突最小化，并且使得大量寻呼单元能够在单个地理区域内操作。

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