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    • 5. 发明申请
    • COEXISTING COMMUNICATION SYSTEMS
    • 共同通信系统
    • WO1997016000A1
    • 1997-05-01
    • PCT/US1996016068
    • 1996-10-07
    • OMNIPOINT CORPORATION
    • OMNIPOINT CORPORATIONKETSEOGLOU, Thomas, J.DIXON, Robert, C.MASENTEN, Wesley
    • H04J03/16
    • H04W16/14H04B7/2618H04B7/2656H04J3/0647H04J3/0652H04L5/1492
    • An integrated communication system supporting multiple TDMA or TDD communication protocols, and includes means for selectively communicating according to either protocol. Each protocol defines time frames and/or time slots of a different duration (901, 911), from which is derived a composite time frame (925) having a predefined timing structure. A first base station unit (104) communicates in a first set of time slots of the composite time frame according to a first TDMA or TDD protocol, and a second base station unit (104) (which may be collocated with the first base station unit) communicates in a second set of time slots of the composite time frame according to a second TDMA or TDD protocol. Coordinating electronics (such as a GPS receiver in one or both base station units) are provided so as to prevent collisions between communications occurring between each base station unit and its respective users. In a particular embodiment, a first protocol is GSM protocol, and a second protocol is a TDD protocol utilizing spread spectrum techniques. The TDD protocol is structured so that each time slot is twice the duration of a GSM time slot, and each time frame is four times the duration of a GSM time frame. The system may comprise a number of "stacked" base stations in a single cell, each operating over a different frequency or using different spreading codes.
    • 一种支持多个TDMA或TDD通信协议的集成通信系统,并且包括用于根据任一协议进行选择性通信的装置。 每个协议定义不同持续时间(901,911)的时间帧和/或时隙,由此导出具有预定义定时结构的复合时间帧(925)。 第一基站单元(104)根据第一TDMA或TDD协议在复合时间帧的第一组时隙中通信,以及第二基站单元(104)(其可以与第一基站单元 )根据第二TDMA或TDD协议在复合时间帧的第二组时隙中进行通信。 提供协调电子设备(例如一个或两个基站单元中的GPS接收机),以防止在每个基站单元与其相应用户之间发生的通信之间的冲突。 在特定实施例中,第一协议是GSM协议,第二协议是利用扩频技术的TDD协议。 TDD协议被构造成使得每个时隙是GSM时隙的持续时间的两倍,并且每个时间帧是GSM时间帧的持续时间的四倍。 该系统可以包括在单个小区中的多个“堆叠”基站,每个基站在不同的频率上操作或使用不同的扩展码。
    • 6. 发明申请
    • THREE-CELL WIRELESS COMMUNICATION SYSTEM
    • 三节无线通信系统
    • WO1992017989A1
    • 1992-10-15
    • PCT/US1992002720
    • 1992-04-03
    • OMNIPOINT CORPORATIONDIXON, Robert, C.
    • OMNIPOINT CORPORATION
    • H04Q07/00
    • H04W16/12H04B2201/70702H04J13/16H04W16/02
    • A wireless communication system including a repeated pattern of cells (203) in which base station transmitters (204) and user station transmitters (202) for each cell may be assigned a spread-spectrum code for modulating radio signal communication in that cell. Radio signals used in that cell are spread across a bandwidth sufficiently wide that both base station receivers and user station receivers in an adjacent cell may distinguish communication which originates in one cell from another. Adjacent cells may use distinguishable frequencies and distinguishable codes, but it is sufficient if adjacent cells use distinguishable frequencies and identical codes. A repeated pattern of cells allows the codes each to be reused in a plurality of cells.
    • 一种无线通信系统,包括小区(203)的重复模式,其中可以为每个小区的基站发射机(204)和用户站发射机(202)分配用于调制该小区中的无线电信号通信的扩频码。 在该小区中使用的无线电信号分布在足够宽的带宽上,使得相邻小区中的基站接收机和用户站接收机都可以将源于一个小区的通信与另一小区区分开。 相邻的小区可以使用可区分的频率和可区分的代码,但是如果相邻小区使用可分辨的频率和相同的代码就足够了。 单元的重复模式允许每个代码在多个单元中重复使用。
    • 8. 发明申请
    • TIMING ADJUSTMENT CONTROL FOR EFFICIENT TIME DIVISION DUPLEX COMMUNICATION
    • 时间调整双向通信时序调整控制
    • WO1996039749A1
    • 1996-12-12
    • PCT/US1996007905
    • 1996-05-28
    • OMNIPOINT CORPORATIONSCOTT, Logan
    • OMNIPOINT CORPORATION
    • H04B01/00
    • H04W56/0055H04B1/7093H04B7/2681H04J3/0682H04J2013/0037H04W56/0045
    • A system for time division duplex communication over a single frequency band wherein guard time overhead is reduced by active adjustment of reverse link transmission timing as a function of round trip propagation delay. Responding to a polling message from the base station, a user station seeking to establish communication transmits a reply message. The base station using a propagation delay calculator (812) calculates the distance of the user station by measuring the propagation delay with respect to receipt of the reply message and a timing control unit (806) and transmitter (807) for sending a timing adjustment command to the user station instructing it to advance or retard its timing. Thereafter, the base station monitors the user station transmissions and periodically commands it to adjust its timing in a like manner. The user station transmits a control preamble at the start of each time slot to allow the base station to perform round trip timing calculations and adjustment of the user station's power or antenna selection.
    • 一种用于在单个频带上进行时分双工通信的系统,其中通过作为往返传播延迟的函数的反向链路传输定时的主动调整来减小保护时间开销。 响应于来自基站的轮询消息,寻求建立通信的用户站发送回复消息。 使用传播延迟计算器(812)的基站通过测量相对于应答消息的接收的传播延迟来计算用户站的距离;以及定时控制单元(806)和发送器(807),用于发送定时调整命令 指示用户站提前或延迟其定时。 此后,基站监视用户站传输,并周期性地命令它以类似的方式调整其定时。 用户站在每个时隙开始时发送控制前同步码,以允许基站执行往返定时计算,并调整用户站的功率或天线选择。
    • 9. 发明申请
    • METHOD AND APPARATUS FOR DESPREADING SPREAD SPECTRUM SIGNALS
    • 用于解决传播频谱信号的方法和装置
    • WO1996035270A1
    • 1996-11-07
    • PCT/US1996004752
    • 1996-04-04
    • OMNIPOINT CORPORATIONGOLD, RobertDIXON, Robert, C.
    • OMNIPOINT CORPORATION
    • H04B15/00
    • H04B1/707H04J14/005H04L7/042
    • A system for despreading and/or demodulating spread spectrum codes is provided. A receiver (601) comprises a plurality of delay elements (603) or a shift register with a plurality of taps configured to recognize one or more of the predetermined symbol codes. Delayed representations of the received signal are generated and combined (605) to produce a known output sequence, such as a string of consecutive one or consecutive zeros, when a recognizable spread spectrum code is received. The receiver shift register (610) may be preloaded such that recognition may occur starting with the first received chip. More than one set of taps may be coupled to the same shift register (610), so that more than one of the M spreading codes may be recognized by the same shift register (610). More than one symbol may be simultaneously transmitted using quadrature phase modulation or like techniques, and recognized by the receiver.
    • 提供了解扩展和/或解调扩频码的系统。 接收机(601)包括多个延迟元件(603)或具有被配置为识别一个或多个预定符号代码的多个抽头的移位寄存器。 当接收到可识别的扩展频谱码时,生成并组合接收信号的延迟表示(605)以产生已知的输出序列,例如连续的一个或连续的零的串。 接收机移位寄存器(610)可以被预加载,使得识别可以从第一个接收的芯片开始发生。 可以将多于一组抽头耦合到相同的移位寄存器(610),使得多个M个扩展码可以由相同的移位寄存器(610)识别。 可以使用正交相位调制或类似技术同时发射多于一个符号,并由接收机识别。
    • 10. 发明申请
    • ANTENNA DIVERSITY TECHNIQUES
    • 天线多样性技术
    • WO1996014699A1
    • 1996-05-17
    • PCT/US1995013170
    • 1995-10-12
    • OMNIPOINT CORPORATION
    • OMNIPOINT CORPORATIONSCOTT, Logan
    • H04J13/00
    • H04B7/0837H04B7/12H04W88/085
    • A receiver system for antenna diversity employing a single backhaul cable (152 or 199). A single backhaul cable (152 or 199) couples a receiver to a plurality of antennas (130 and 131 or 230 and 231). The signals (140 and 141, or 195 and 196) from the antennas (130 and 131, or 230 and 231) are combined onto the single backhaul cable (152 or 199) using frequency offsets, spread spectrum code divison, time division, or a combination thereof. At the receiver, the signals from the antennas are decoupled. In the case of splitting the backhaul signal into a plurality of duplicate signals, frequency shifting selected ones of the duplicate signals, and correlating the frequency shifted signals. In the case of spread spectrum code division, the antenna signals are decoupled by splitting the backhaul signal into a plurality of duplicate signals and demultiplexing each of the duplicate signals with a different spread spectrum code. One or more antennas may be selected for communication in response decoupling the antenna signals.
    • 一种采用单回程电缆(152或199)的天线分集接收机系统。 单个回程电缆(152或199)将接收器耦合到多个天线(130和131或230和231)。 来自天线(130和131或230和231)的信号(140和141或195和196)使用频率偏移,扩展频谱代码分割,时分或者分频来组合到单个回程电缆(152或199)上 其组合。 在接收机处,来自天线的信号被去耦。 在将回程信号分解为多个重复信号的情况下,对所选择的重复信号中的一个进行频移,并且对频移信号进行相关。 在扩频码划分的情况下,天线信号通过将回程信号分成多个重复信号并且用不同的扩频码解复用每个重复信号来解耦。 可以选择一个或多个天线进行通信,以响应天线信号的去耦。