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公开(公告)号：US5796772A
公开(公告)日：1998-08-18
申请号：US485987
申请日：1995-06-07
IPC分类号： G10L19/00 , H04B1/40 , H04B1/69 , H04B1/707 , H04B7/005 , H04B7/26 , H04J11/00 , H04J13/02 , H04L1/00 , H04L12/56 , H04L27/12 , H04W36/18 , H04W52/00 , H04W52/04 , H04W52/08 , H04W52/36 , H04W52/40 , H04W88/06 , H04K1/00 , H04L5/16 , H04L27/00
CPC分类号： H04W52/367 , G10L19/012 , H04B1/005 , H04B1/0057 , H04B1/006 , H04B1/406 , H04B1/69 , H04B1/707 , H04B7/2618 , H04B7/2634 , H04J13/00 , H04L27/12 , H04W52/04 , H04W52/08 , H04W52/362 , H04W52/40 , H04B2201/7071 , H04L1/0002 , H04W36/18 , H04W52/38 , H04W88/06
摘要： A technique for spread-spectrum communication which uses more than one mode and more than one frequency band. Selectable modes include narrowband mode and spread-spectrum mode, or cellular mode and microcellular mode. Selectable frequency bands include both licensed and unlicensed frequency bands, particularly frequency bands including the 902-928 MHz, 1850-1990 MHz, and 2.4-2.4835 GHz frequency bands. Spread-spectrum communication channels are 10 MHz or less in width. The frequency band onto which spread-spectrum signals are encoded may be changed upon a change in environment or other control trigger, such as establishment or de-establishment of communication with a private access network. A multi-band transmitter comprises a single frequency synthesizer and a frequency source (e.g., a local oscillator), coupled to a selectable band pass filter. A multi-band receiver capable of monitoring one or more frequency bands comprises bank of bandpass filters and a demodulator comprising a single frequency synthesizer and a frequency source.
摘要翻译： 一种使用多于一种模式和多于一个频带的扩频通信技术。 可选择的模式包括窄带模式和扩频模式，或蜂窝模式和微蜂窝模式。 可选择的频段包括许可和非授权频段，特别是包括902-928 MHz，1850-1990 MHz和2.4-2.4835 GHz频段的频段。 扩频通信信道宽度为10 MHz或更小。 对扩频信号进行编码的频带可以在环境或其他控制触发的变化（诸如与专用接入网的建立或取消建立通信）之后改变。 多频带发射机包括耦合到可选择带通滤波器的单个频率合成器和频率源（例如本地振荡器）。 能够监视一个或多个频带的多频带接收机包括一组带通滤波器和一个包括单个频率合成器和频率源的解调器。
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公开(公告)号：US5737324A
公开(公告)日：1998-04-07
申请号：US767152
申请日：1996-12-16
CPC分类号： H04B7/2628
摘要： A method for establishing communications between a master unit and a plurality of node units. Of the plurality of node units, K node units are assumed to have established communications with a master unit. A first (K+1) node unit of the plurality of node units, desires to establish communications with the master unit. The method includes transmitting from the master unit, a base-station spread spectrum signal having a common signalling chip code, transmitting from the first node unit a second spread spectrum signal with a first identification code using the common-signalling chip code, transmitting from the master unit a third spread spectrum signal with a master unit identification code, using the common-signalling chip code. The method further includes generating at the first node unit using the master unit identification signal, a master unit chip code for transmitting spread spectrum signals to the master unit. Additionally, the method includes generating, at the master unit using the first identification code, a first node unit chip code for transmitting spread spectrum signals to the first node unit.
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公开(公告)号：US06421368B1
公开(公告)日：2002-07-16
申请号：US09256617
申请日：1999-02-23
IPC分类号： H04B169
CPC分类号： H04W36/0066 , H04B7/2618 , H04B7/2628 , H04J13/00 , H04W4/16 , H04W36/14 , H04W76/10 , H04W84/16
摘要： A system for accessing a telephone system, in which a set of user stations are matched with a set of base stations for connection to a telephone network. Each base station may be coupled directly or indirectly to the telephone network and may be capable of initiating or receiving calls on the telephone network. Each user station may comprise a spread-spectrum transmitter or receiver and may be capable of dynamic connection to selected base stations. A plurality of base stations may be coupled to a private exchange telephone system for coupling user stations in calls outside the telephone network. User stations may use CDMA, FDMA, TDMA or other multiple-access techniques to obtain one or more clear communication paths to base stations. User stations may make and break connections with base stations as the user station moves between service regions, or is otherwise more advantageously serviced by, base stations. User stations may direct requests to and receive information from an enhanced telephone services processor, so as to obtain enhanced telephone services within the telephone network. Base stations may be coupled to each other by means of a private exchange telephone system or other small business telephone system (such as a PBX, Centrex, or key-type system) so as to couple user stations in calls outside the telephone network. User stations may also be coupled directly or indirectly to the telephone network on their own or by another access path, such as narrowband or spread-spectrum cellular telephone circuits.
摘要翻译： 一种用于访问电话系统的系统，其中一组用户站与用于连接到电话网络的一组基站匹配。 每个基站可以直接或间接地耦合到电话网络，并且可以能够在电话网络上发起或接收呼叫。 每个用户站可以包括扩频发射机或接收机，并且可以能够动态地连接到所选择的基站。 多个基站可以耦合到专用交换电话系统，用于在电话网络外的呼叫中耦合用户站。 用户站可以使用CDMA，FDMA，TDMA或其他多址技术来获得到基站的一个或多个清除通信路径。 当用户站在服务区域之间移动时，用户站可以使基站断开连接，或者由基站更有利地服务于基站。 用户站可以向增强型电话服务处理器发送请求并从其接收信息，以便在电话网络内获得增强的电话服务。 基站可以通过专用交换电话系统或其他小商业电话系统（例如PBX，Centrex或密钥型系统）彼此耦合，以便在电话网络外的呼叫中耦合用户站。 用户站也可以直接地或间接地耦合到电话网络，或者通过另一个接入路径，比如窄带或扩频蜂窝电话线路。
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公开(公告)号：US5887020A
公开(公告)日：1999-03-23
申请号：US293671
申请日：1994-08-18
IPC分类号： G10L19/00 , H04B1/40 , H04B1/69 , H04B1/707 , H04B7/005 , H04B7/26 , H04J11/00 , H04J13/02 , H04L1/00 , H04L12/56 , H04L27/12 , H04W36/18 , H04W52/00 , H04W52/04 , H04W52/08 , H04W52/36 , H04W52/40 , H04W88/06 , H04K1/00
CPC分类号： H04J13/00 , G10L19/012 , H04B1/005 , H04B1/0057 , H04B1/006 , H04B1/406 , H04B1/69 , H04B1/707 , H04B7/2618 , H04B7/2634 , H04L27/12 , H04W52/04 , H04W52/08 , H04W52/362 , H04W52/367 , H04W52/40 , H04B2201/7071 , H04L1/0002 , H04W36/18 , H04W88/06
摘要： A technique for spread-spectrum communication which uses more than one mode and more than one frequency band. Selectable modes include narrowband mode and spread-spectrum mode, or cellular mode and microcellular mode. Selectable frequency bands include both licensed and unlicensed frequency bands, particularly frequency bands including the 902-928 MHz, 1850-1990 MHz, and 2.4-2.4835 GHz frequency bands. Spread-spectrum communication channels are 10 MHz or less in width. The frequency band onto which spread-spectrum signals are encoded may be changed upon a change in environment or other control trigger, such as establishment or de-establishment of communication with a private access network.
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公开(公告)号：US5654978A
公开(公告)日：1997-08-05
申请号：US146490
申请日：1993-11-01
CPC分类号： H04B1/707 , H04B14/026
摘要： A method of pulse-position modulation in a spread-spectrum communication system, which is capable of transmitting more than one bit per received and recognized chip sequence in a system in which an entire chip sequence is required to produce a correlation pulse. A framing pulse window in which a framing pulse may be received, and a plurality of data pulse windows in which a data pulse may (or may not) be received. The delay between the framing pulse window and the first data pulse window may comprise an entire chip-sequence duration, while the delay from one data pulse window to the next may be less. A method of pulse-position modulation with more than one spread-spectrum code. A second transmission medium (such as a second spread-spectrum code) on which a data pulse may (or may not) be received. Each possible choice, for the data pulse, of delay time and transmission code may represent a separate set of multiple data bits. A method of transmitting signals in a spread-spectrum communication system in which a spread-spectrum chip sequence may be interrupted with reduced noise. The system may ground the transmitter antenna at the end of a chip sequence when it is desired to delay transmission of the next chip sequence.
摘要翻译： 一种在扩频通信系统中的脉冲位置调制方法，其能够在需要整个码片序列以产生相关脉冲的系统中每接收和识别的码片序列发送多于一个比特。 可以接收成帧脉冲的成帧脉冲窗口，以及可以（或可能不）接收数据脉冲的多个数据脉冲窗口。 成帧脉冲窗口和第一数据脉冲窗口之间的延迟可以包括整个芯片序列持续时间，而从一个数据脉冲窗口到下一个数据脉冲窗口的延迟可能较小。 一种具有多个扩频码的脉冲位置调制方法。 可以（或可能不）接收数据脉冲的第二传输介质（诸如第二扩频码）。 延迟时间和传输代码的数据脉冲的每个可能的选择可以表示单独的一组多个数据位。 一种在扩频通信系统中发送信号的方法，其中扩频码片序列可以以降低的噪声中断。 当需要延迟下一个芯片序列的传输时，系统可以将发射机天线接地到芯片序列的末尾。
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公开(公告)号：US5499265A
公开(公告)日：1996-03-12
申请号：US216084
申请日：1994-03-21
摘要： An apparatus for decoding a received spread spectrum signal having a data signal modulated with a pseudo-noise code and transmitted as an RF spread spectrum signal. A first reference register holds a first pseudo-noise signal, a second reference register holds a second pseudo-noise signal, and a receive-register holds a received spread spectrum signal. A first modulo adder adds each chip of the received spread spectrum signal with each respective chip of the first pseudo-noise signal, thereby generating a first plurality of chip-comparison signals. A first summer adds the first plurality of chip-comparison signals, generating a first correlation signal. The comparator compares the correlation signal to an upper-threshold level and a lower-threshold level, and respectively generates a first data-symbol signal or a second data-symbol signal.
摘要翻译： 一种用于对接收到的扩展频谱信号进行解码的装置，该扩展频谱信号具有用伪噪声码调制并作为RF扩频信号发射的数据信号。 第一参考寄存器保存第一伪噪声信号，第二参考寄存器保存第二伪噪声信号，并且接收寄存器保持接收的扩频信号。 第一模加法器将接收到的扩频信号的每个码片与第一伪噪声信号的每个相应码片相加，由此产生第一多个码片比较信号。 第一夏季添加第一多个码片比较信号，产生第一相关信号。 比较器将相关信号与上阈值电平和下阈值电平进行比较，分别产生第一数据符号信号或第二数据符号信号。
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公开(公告)号：US5455822A
公开(公告)日：1995-10-03
申请号：US161187
申请日：1993-12-03
CPC分类号： H04B7/2628
摘要： A method for establishing communications between a master unit and a plurality of node units. Of the plurality of node units, K node units are assumed to have established communications with a master unit. A first (K+1) node unit of the plurality of node units, desires to establish communications with the master unit. The method includes transmitting from the master unit, a base-station spread spectrum signal having a common signalling chip code, transmitting from the first node unit a second spread spectrum signal with a first identification code using the common-signalling chip code, transmitting from the master unit a third spread spectrum signal with a master unit identification code, using the common-signalling chip code. The method further includes generating at the first node unit using the master unit identification signal, a master unit chip code for transmitting spread spectrum signals to the master unit. Additionally, the method includes generating, at the master unit using the first identification code, a first node unit chip code for transmitting spread spectrum signals to the first node unit.
摘要翻译： 一种用于在主单元和多个节点单元之间建立通信的方法。 在多个节点单元中，假定K个节点单元已建立与主单元的通信。 多个节点单元中的第一（K + 1）个节点单元希望建立与主单元的通信。 该方法包括从主单元发送具有公共信令芯片码的基站扩频信号，使用公共信令码片码从第一节点单元发送具有第一识别码的第二扩频信号，从 主单元具有主单元识别码的第三扩频信号，使用公共信号芯片码。 该方法还包括使用主单元识别信号在第一节点单元处生成用于向主单元发射扩频信号的主单元芯片码。 此外，该方法包括在主单元处使用第一识别码生成用于将扩频信号发送到第一节点单元的第一节点单元码片码。
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公开(公告)号：US5285469A
公开(公告)日：1994-02-08
申请号：US712239
申请日：1991-06-07
CPC分类号： H04W36/0066 , H04B7/2618 , H04B7/2628 , H04J13/00 , H04W36/14 , H04W4/16 , H04W76/02 , H04W84/16
摘要： A system for accessing a telephone system, in which a set of user stations are matched with a set of base stations for connection to a telephone network. Each base station may be coupled directly or indirectly to the telephone network and may be capable of initiating or receiving calls on the telephone network. Each user station may comprise a spread-spectrum transmitter or receiver and may be capable of dynamic connection to selected base stations A plurality of base stations may be coupled to a private exchange telephone system for coupling user stations in calls outside the telephone network. User stations may use CDMA, FDMA, TDMA or other multiple-access techniques to obtain one or more clear communication paths to base stations. Base stations may be placed at convenient locations or may themselves be mobile. User stations may make and break connections with base stations as the user station moves between service regions, or is otherwise more advantageously serviced by, base stations. User stations may direct requests to and receive information from an enhanced telephone services processor, so as to obtain enhanced telephone services within the telephone network. Base stations may be coupled to each other by means of a private exchange telephone system or other small business telephone system (such as a PBX, Centrex, or key-type system) so as to couple user stations in calls outside the telephone network. User stations may also be coupled directly or indirectly to the telephone network on their own or by another access path, such as narrowband or spread-spectrum cellular telephone circuits.
摘要翻译： 一种用于访问电话系统的系统，其中一组用户站与用于连接到电话网络的一组基站匹配。 每个基站可以直接或间接地耦合到电话网络，并且可以能够在电话网络上发起或接收呼叫。 每个用户站可以包括扩频发射机或接收机，并且能够动态地连接到所选择的基站。多个基站可以耦合到专用交换电话系统，用于在电话网络外的呼叫中耦合用户站。 用户站可以使用CDMA，FDMA，TDMA或其他多址技术来获得到基站的一个或多个清除通信路径。 基站可以放置在方便的位置，或者可以是移动的。 当用户站在服务区域之间移动时，用户站可以使基站断开连接，或者由基站更有利地服务于基站。 用户站可以向增强电话服务处理器发送请求并从其接收信息，以便在电话网络内获得增强的电话服务。 基站可以通过专用交换电话系统或其他小商业电话系统（例如PBX，Centrex或密钥型系统）彼此耦合，以便在电话网络外的呼叫中耦合用户站。 用户站也可以直接地或间接地耦合到电话网络，或者通过另一个接入路径，比如窄带或扩频蜂窝电话线路。
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公开(公告)号：US5790587A
公开(公告)日：1998-08-04
申请号：US483514
申请日：1995-06-07
IPC分类号： G10L19/00 , H04B1/40 , H04B1/69 , H04B1/707 , H04B7/005 , H04B7/26 , H04J11/00 , H04J13/02 , H04L1/00 , H04L12/56 , H04L27/12 , H04W36/18 , H04W52/00 , H04W52/04 , H04W52/08 , H04W52/36 , H04W52/40 , H04W88/06 , H04K1/00 , H04L27/26
CPC分类号： H04B7/2634 , G10L19/012 , H04B1/005 , H04B1/0057 , H04B1/006 , H04B1/406 , H04B1/69 , H04B1/707 , H04B7/2618 , H04J13/00 , H04L27/12 , H04W52/04 , H04W52/08 , H04W52/362 , H04W52/367 , H04W52/40 , H04B2201/7071 , H04L1/0002 , H04W36/18 , H04W88/06
摘要： A technique for spread-spectrum communication which uses more than one mode and more than one frequency band. Selectable modes include narrowband mode and spread-spectrum mode, or cellular mode and microcellular mode. Selectable frequency bands include both licensed and unlicensed frequency bands, particularly frequency bands including the 902-928 MHz, 1850-1990 MHz, and 2.4-2.4835 GHz frequency bands. Spread-spectrum communication channels are 10 MHz or less in width. The frequency band onto which spread-spectrum signals are encoded may be changed upon a change in environment or other control trigger, such as establishment or de-establishment of communication with a private access network. A multi-band transmitter comprises a single frequency synthesizer and a frequency source (e.g., a local oscillator), coupled to a selectable band pass filter. A multi-band receiver capable of monitoring one or more frequency bands comprises bank of bandpass filters and a demodulator comprising a single frequency synthesizer and a frequency source.
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公开(公告)号：US5719900A
公开(公告)日：1998-02-17
申请号：US613937
申请日：1996-03-11
摘要： An apparatus for decoding a received spread spectrum signal having a data signal modulated with a pseudo-noise code and transmitted as an RF spread spectrum signal. A first reference register holds a first pseudo-noise signal, a second reference register holds a second pseudo-noise signal, and a receive-register holds a received spread spectrum signal. A first modulo adder adds each chip of the received spread spectrum signal with each respective chip of the first pseudo-noise signal, thereby generating a first plurality of chip-comparison signals. A first summer adds the first plurality of chip-comparison signals, generating a first correlation signal. The comparator compares the correlation signal to an upper threshold level and a lower-threshold level, and respectively generates a first data-symbol signal or a second data-symbol signal.
摘要翻译： 一种用于对接收到的扩展频谱信号进行解码的装置，该扩展频谱信号具有用伪噪声码调制并作为RF扩频信号发射的数据信号。 第一参考寄存器保存第一伪噪声信号，第二参考寄存器保存第二伪噪声信号，并且接收寄存器保持接收的扩频信号。 第一模加法器将接收到的扩频信号的每个码片与第一伪噪声信号的每个相应码片相加，由此产生第一多个码片比较信号。 第一夏季添加第一多个码片比较信号，产生第一相关信号。 比较器将相关信号与上阈值电平和下阈值电平进行比较，并分别产生第一数据符号信号或第二数据符号信号。
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