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1.发明授权Apparatus and methods for providing high-penetration messaging in wireless communications systems 有权在无线通信系统中提供高穿透消息的设备和方法公开(公告)号：US06332006B1
公开(公告)日：2001-12-18
申请号：US09195790
申请日：1998-11-18
IPC分类号： H04B102
CPC分类号： H04L1/007 , H04L1/02 , H04L27/2071
摘要： A message, e.g., a control message, a short message, a voice message or a data message, is transmitted on at least one of a first communications channel having a first redundancy level or a second communications channel having a second, higher redundancy level. A radio communications signal is received on one of the first communications channel and the second communications channel. The received radio communications signal is demodulated to recover the message using a first demodulation scheme if the radio communications signal is received on the first communications channel and using a second demodulation scheme if the radio communications signal is received on the second communications channel. According to an aspect of the invention, the received radio communications signal is coherently demodulated if the radio communications signal is received over the first communications channel and non-coherently demodulated if the radio communications signal is received over the second communications channel. According to another aspect, the message is transmitted on the first communications channel using a first modulation constellation, and transmitted on the second communications channel using a second modulation constellation representing a subset of the first modulation constellation. In other embodiments of the present invention, a first radio communications signal is transmitted representing the message encoded according to one of a first code or a second code that represents a concatenation of the first code and an additional code, such as an orthogonal code or a quasi orthogonal code. Related systems and apparatus are also described.
摘要翻译： 在具有第一冗余级别的第一通信信道或具有第二较高冗余级别的第二通信信道中的至少一个上发送消息，例如控制消息，短消息，语音消息或数据消息。 在第一通信信道和第二通信信道之一上接收无线电通信信号。 如果在第一通信信道上接收到无线电通信信号并且如果在第二通信信道上接收到无线电通信信号，则使用第二解调方案，解调接收到的无线电通信信号以使用第一解调方案来恢复消息。 根据本发明的一个方面，如果在第一通信信道上接收到无线电通信信号并且如果在第二通信信道上接收到无线电通信信号而被非相干解调，则所接收的无线电通信信号被相干解调。 根据另一方面，使用第一调制星座在第一通信信道上发送消息，并且使用表示第一调制星座的子集的第二调制星座在第二通信信道上发送消息。 在本发明的其他实施例中，发送第一无线电通信信号，表示根据代表第一代码和附加代码的级联的第一代码或第二代码之一编码的消息，诸如正交码或 准正交码。 还描述了相关系统和装置。
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2.发明授权Wireless communications systems with standard and robust services and methods of operation thereof 有权具有标准和可靠服务的无线通信系统及其操作方法公开(公告)号：US06320843B1
公开(公告)日：2001-11-20
申请号：US09193261
申请日：1998-11-18
IPC分类号： H04J1100
CPC分类号： H04L1/0003 , H04L1/0009
摘要： In a wireless communications system, information is communicated over one of a first communications channel having a first redundancy level or a second communications channel having a second redundancy level based on a determination of communications quality for at least one of the channels. In embodiments of the present invention, communications occur over a first channel, e.g., a “standard” channel until a measure of communications quality for that channel, such as bit error rate or frame error rate, meets a predetermined criterion. When the communications quality meets the predetermined criterion, communications shifts to a “robust” high-penetration channel that utilizes substantially the same amount of spectral resource as the first channel but provides significantly increased redundancy. In other embodiments, a terminal, e.g., a cellular radiotelephone or other radio terminal, registers with a wireless communications system via one of a standard broadcast control channel or a high-penetration broadcast control channel, and switches therebetween based upon a determination of communications quality for the standard broadcast control channel. For example, the terminal may switch to the high-penetration broadcast control channel upon failure to acquire the standard broadcast control channel in a disadvantaged reception area.
摘要翻译： 在无线通信系统中，基于对于至少一个信道的通信质量的确定，在具有第一冗余级别的第一通信信道之一或具有第二冗余级别的第二通信信道之一上传送信息。 在本发明的实施例中，通信发生在第一信道，例如“标准”信道上，直到该信道的通信质量的度量（诸如误码率或帧错误率）满足预定标准。 当通信质量满足预定标准时，通信转移到利用与第一信道基本上相同的频谱资源量的“稳健”高穿透信道，但提供显着增加的冗余度。 在其他实施例中，诸如蜂窝无线电话机或其他无线电终端的终端通过标准广播控制信道或高穿透广播控制信道之一向无线通信系统注册，并且基于通信质量的确定来切换它们 用于标准广播控制频道。 例如，如果在不利的接收区域中获取标准广播控制信道，则终端可以切换到高穿透广播控制信道。
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公开(公告)号：US06493322B1
公开(公告)日：2002-12-10
申请号：US08840268
申请日：1997-04-14
IPC分类号： H04J314
CPC分类号： H04B7/18534
摘要： A diversity scheme for allowing a transmitter/receiver, such as a mobile unit in a mobile telecommunications system, to exchange communication signals with more than one control station, such as a base station or satellite. According to an exemplary embodiment of the diversity scheme, the mobile unit scans for the control channel of a second satellite during idle time slots while communicating with a first satellite during active time slots. Once the mobile unit detects a control channel from a second satellite, the mobile unit stores synchronization information and establishes a communication link with the second satellite if shadowing or other severe fading causes signal quality over a communication link established with a first satellite to fall below a threshold level. The diversity scheme also allows the mobile unit to communicate simultaneously with two satellites, using alternate TDMA frames.
摘要翻译： 用于允许诸如移动电信系统中的移动单元的发射机/接收机与诸如基站或卫星的多于一个控制站交换通信信号的分集方案。 根据分集方案的示例性实施例，移动单元在空闲时隙期间扫描第二卫星的控制信道，同时在活动时隙期间与第一卫星通信。 一旦移动单元检测到来自第二卫星的控制信道，则移动单元存储同步信息并与第二卫星建立通信链路，如果阴影或其他严重衰落导致通过与第一卫星建立的通信链路的信号质量降至低于 门限等级。 分集方案还允许移动单元使用备用TDMA帧同时与两颗卫星通信。
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公开(公告)号：US5907809A
公开(公告)日：1999-05-25
申请号：US710761
申请日：1996-09-20
申请人： Karl Molnar , Rajaram Ramesh , Amer Aref Hassan , Barbara Molnar
发明人： Karl Molnar , Rajaram Ramesh , Amer Aref Hassan , Barbara Molnar
IPC分类号： H01Q3/26 , G01S3/14 , G01S3/28 , G01S5/04 , G01S5/12 , G01S5/14 , G01S19/25 , H01Q1/24 , H01Q21/08 , H01Q21/28 , H04B7/08 , H04B7/10 , H04B7/185 , H04L1/00 , H04L1/06 , H04L25/03 , H04W16/28 , H04W64/00 , H04B7/26 , G01S3/72 , G01S5/02
CPC分类号： G01S5/14 , G01S3/28 , G01S5/04 , H01Q1/246 , H01Q21/08 , H01Q21/28 , H04B7/0851 , H04B7/10 , H04B7/18515 , H04B7/18532 , H04B7/18545 , H04B7/18567 , H04L1/0069 , H04L1/0071 , H04L1/06 , H04L25/03331 , H04W64/00 , G01S3/146 , G01S5/12 , H04B7/0837 , H04L2001/0098 , H04W16/28
摘要： Exemplary embodiments of the present invention describe terminal position location methods and systems. Relative powers of nearby spot beams which are generated by array antennas are determined. For example, powers from six neighboring spot beams relative to a center spot beam within which a mobile station is currently operating, can be measured relative to the power of the center spot beam. Using information from these measurements, the mobile stations position can be determined using, for example, an exponential model of the spot beam pattern.
摘要翻译： 本发明的示例性实施例描述了终端位置定位方法和系统。 确定由阵列天线产生的附近点波束的相对功率。 例如，可以相对于中心点光束的功率测量相对于移动台当前正在其中操作的中心点波束的六个相邻点波束的功率。 使用来自这些测量的信息，可以使用例如点波束图案的指数模型来确定移动台位置。
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公开(公告)号：US5661724A
公开(公告)日：1997-08-26
申请号：US574141
申请日：1995-12-18
CPC分类号： H04B7/18534
摘要： A diversity scheme for allowing a transmitter/receiver, such as a mobile unit in a mobile telecommunications system, to exchange communication signals with more than one control station, such as a base station or satellite. According to an exemplary embodiment of the diversity scheme, the mobile unit scans for the control channel of a second satellite during idle time slots while communicating with a first satellite during active time slots. Once the mobile unit detects a control channel from a second satellite, the mobile unit stores synchronization information and establishes a communication link with the second satellite if shadowing or other severe fading causes signal quality over a communication link established with a first satellite to fall below a threshold level. The diversity scheme also allows the mobile unit to communicate simultaneously with two satellites, using alternate TDMA frames.
摘要翻译： 用于允许诸如移动电信系统中的移动单元的发射机/接收机与诸如基站或卫星的多于一个控制站交换通信信号的分集方案。 根据分集方案的示例性实施例，移动单元在空闲时隙期间扫描第二卫星的控制信道，同时在活动时隙期间与第一卫星通信。 一旦移动单元检测到来自第二卫星的控制信道，则移动单元存储同步信息并与第二卫星建立通信链路，如果阴影或其他严重衰落导致通过与第一卫星建立的通信链路的信号质量降至低于 门限等级。 分集方案还允许移动单元使用备用TDMA帧同时与两颗卫星通信。
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