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。

公开(公告)号：US5661724A

公开(公告)日：1997-08-26

申请号：US574141

申请日：1995-12-18

申请人： Sandeep Chennakeshu ,  Amer A. Hassan ,  Barbara Molnar ,  Karl Molnar ,  Rajaram Ramesh

发明人： Sandeep Chennakeshu ,  Amer A. Hassan ,  Barbara Molnar ,  Karl Molnar ,  Rajaram Ramesh

IPC分类号： H04B7/212 ,  H04B7/185 ,  H04B7/195

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。

公开(公告)号：US20070008943A1

公开(公告)日：2007-01-11

申请号：US11138724

申请日：2005-05-26

申请人： Stephen Grant ,  Jung-fu Cheng ,  Karl Molnar ,  Yi-Pin Wang ,  Rajaram Ramesh

发明人： Stephen Grant ,  Jung-fu Cheng ,  Karl Molnar ,  Yi-Pin Wang ,  Rajaram Ramesh

IPC分类号： H04B7/216

CPC分类号： H04L1/0026 ,  H04B7/061 ,  H04B7/0678 ,  H04B7/0691 ,  H04B7/0697 ,  H04B17/309 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0033 ,  H04L1/06 ,  H04L1/20 ,  H04L5/0057 ,  H04W24/10

摘要： A wireless communication receiver receiving a multiplexed signal comprising two or more signal streams calculates a received signal quality for the multiplexed signal as a function of stream-specific received signal qualities, determines one or more loss parameters indicative of variations in the stream-specific received signal qualities, and generates quality feedback based on such information. In turn, a transmitter controls the selection of one or more transmission parameters of the multiplexed signal based on the quality feedback, such that its transmit link adaptations account for the losses in received signal quality at the receiver arising from the variations in the stream-specific received signal qualities. The quality feedback may include calculated loss values, or parameter/penalties that permit loss calculation, and the method applies to both code multiplexing and spatial multiplexing.

摘要翻译： 接收包括两个或多个信号流的多路复用信号的无线通信接收机根据流专用接收信号质量计算多路复用信号的接收信号质量，确定一个或多个指示流特定接收信号变化的丢失参数 质量，并根据这些信息产生质量反馈。 反过来，发射机基于质量反馈来控制对多路复用信号的一个或多个传输参数的选择，使得其发射链路适应性考虑到接收机的接收信号质量中由于流特定的变化引起的损耗 收到信号质量。 质量反馈可以包括计算的损失值或允许损耗计算的参数/惩罚，并且该方法适用于码复用和空间复用两者。

公开(公告)号：US20050250544A1

公开(公告)日：2005-11-10

申请号：US10841911

申请日：2004-05-07

申请人： Stephen Grant ,  Yi-Pin Wang ,  Rajaram Ramesh ,  Karl Molnar ,  Jung-Fu Cheng ,  Leonid Krasny

发明人： Stephen Grant ,  Yi-Pin Wang ,  Rajaram Ramesh ,  Karl Molnar ,  Jung-Fu Cheng ,  Leonid Krasny

IPC分类号： H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04B1/38

CPC分类号： H04L1/0002 ,  H04B7/06 ,  H04B7/061 ,  H04B7/0639 ,  H04B7/0691 ,  H04B7/0697 ,  H04L1/0025 ,  H04L1/0029 ,  H04L1/06 ,  Y02D50/10

摘要： A method is described herein that enables a Selective-Per-Antenna-Rate-Control (S-PARC) technique to be effectively implemented in a wireless communications network (e.g., HSPDA third generation communications network). In one embodiment, the method enables the S-PARC technique to be implemented in the wireless communications network by enabling a mobile terminal device to generate and transmit a “full” feedback signal to a base station that analyzes the “full” feedback signal and determines which mode and transmission rate(s) are going to be used to transmit data substream(s) from selected transmit antenna(s) to the mobile terminal device. In another embodiment, the method enables the S-PARC technique to be implemented in the wireless communications network by enabling a mobile terminal device to generate and transmit a “reduced” feedback signal to a base station that analyzes the “reduced” feedback signal and determines which mode and transmission rate(s) are going to be used to transmit data substream(s) from selected transmit antenna(s) to the mobile terminal device.

摘要翻译： 本文描述了一种能够在无线通信网络（例如，HSPDA第三代通信网络）中有效实现选择性天线速率控制（S-PARC）技术的方法。 在一个实施例中，该方法使得能够在无线通信网络中实现S-PARC技术，使得移动终端设备能够生成并向基站发送“全”反馈信号，分析“完整”反馈信号并确定 哪个模式和传输速率将用于将数据子流从所选择的发射天线传送到移动终端设备。 在另一个实施例中，该方法使得能够在无线通信网络中实现S-PARC技术，使得移动终端设备能够生成并向基站发送“减少”的反馈信号，该基站分析“减少的”反馈信号并确定 哪个模式和传输速率将用于将数据子流从所选择的发射天线传送到移动终端设备。

公开(公告)号：US06266534B1

公开(公告)日：2001-07-24

申请号：US09488460

申请日：2000-01-20

申请人： Alex K. Raith ,  Rajaram Ramesh ,  Karl Molnar ,  R. David Koilpillai ,  Havish Koorapaty

发明人： Alex K. Raith ,  Rajaram Ramesh ,  Karl Molnar ,  R. David Koilpillai ,  Havish Koorapaty

IPC分类号： H04Q720

CPC分类号： G01S5/14 ,  G01S5/06 ,  H04W4/90 ,  H04W76/50

摘要： Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide improved techniques for using a system of monitoring or adjunct stations to provide this location information to the emergency service centers. For example, received signal strength measurements in conjunction with path loss models, alone or in conjunction with either time of arrival (TOA) or time difference of arrival (TDOA) techniques can be selectively used to process received signals and provide location information. Techniques for improving timing estimates are also disclosed.

摘要翻译： 在不久的将来，紧急呼叫处理可能需要向紧急服务中心提供终端单元位置信息。 本发明的示例性实施例提供了使用监控系统或附加站的改进技术来向紧急服务中心提供该位置信息。 例如，可以选择性地使用接收的信号强度测量结合路径损耗模型，单独地或与到达时间（TOA）或到达时差（TDOA）技术相结合来处理接收到的信号并提供位置信息。 还公开了用于改善时序估计的技术。

公开(公告)号：US06493322B1

公开(公告)日：2002-12-10

申请号：US08840268

申请日：1997-04-14

申请人： Sandeep Chennakeshu ,  Amer A. Hassan ,  Barbara Molnar ,  Karl Molnar ,  Rajaram Ramesh

发明人： Sandeep Chennakeshu ,  Amer A. Hassan ,  Barbara Molnar ,  Karl Molnar ,  Rajaram Ramesh

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。

公开(公告)号：US08538464B2

公开(公告)日：2013-09-17

申请号：US12346286

申请日：2008-12-30

申请人： Rajaram Ramesh ,  Havish Koorapaty ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Havish Koorapaty ,  Kumar Balachandran

IPC分类号： H04W68/00

CPC分类号： H04W68/02 ,  H04W4/08 ,  H04W72/0466

摘要： Code words are assigned to subscriber stations or groups of subscriber stations in a communication network for a quick paging mechanism in which the assigned code words are transmitted as quick paging signals over unused frequency resources to signal the subscriber stations. Subsets of multiple code words from a set of code words can be assigned to respective paging groups, and overlapping subsets can be assigned to multiple paging groups. This enables a single code word to be used to address either a single paging group or multiple paging groups.

摘要翻译： 代码字被分配给通信网络中的订户站或用户站组，用于快速寻呼机制，其中分配的码字作为快速寻呼信号在未使用的频率资源上发送，以向用户台发信号。 可以将来自一组码字的多个码字的子集分配给各个寻呼组，并且可以将重叠的子集分配给多个寻呼组。 这使得能够使用单个代码字来寻址单个寻呼组或多个寻呼组。

公开(公告)号：US08144720B2

公开(公告)日：2012-03-27

申请号：US12429468

申请日：2009-04-24

申请人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

发明人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

IPC分类号： H04Q11/02

CPC分类号： H04L49/9094 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0046 ,  H04L5/006 ,  H04L43/0894 ,  H04L43/16 ,  H04L47/70 ,  H04L47/74 ,  H04L47/781 ,  H04W28/065 ,  H04W28/22 ,  H04W72/044 ,  H04W72/048 ,  H04W72/12 ,  Y02D70/146

摘要： A base station in an OFDMA system which determines a modulation and coding scheme to use for a packet of a certain size to be transmitted by a Mobile Station. The base station schedules transmissions by mobile stations and transmits packets. The base station includes a processing unit which determines a number of time-frequency resources required to transmit the packet for a modulation and coding scheme, determines an SINR based on the number of time-frequency resources used and available power at the mobile station, determines a transmission rate as a ratio of the packet size transmitted to the number of time-frequency resources used, sets a rate to zero if the determined SINR is lower than a threshold SINR required for the modulation and coding scheme, and selects the modulation and coding scheme with a highest transmission rate. The base station includes a memory storing modulation and coding schemes.

摘要翻译： OFDMA系统中的基站，其确定用于要由移动站发送的一定大小的分组的调制和编码方案。 基站调度移动台的传输并发送分组。 基站包括：处理单元，其确定用于调制和编码方案发送分组所需的时间频率资源的数量;基于所使用的时间频率资源的数量和移动站的可用功率来确定SINR，确定 如果发送的分组大小与使用的时间 - 频率资源的数量的比率的传输速率，则如果确定的SINR低于调制和编码方案所需的阈值SINR，则将速率设置为零，并且选择调制和编码 传输速率最高的方案。 基站包括存储调制和编码方案的存储器。

公开(公告)号：US07796698B2

公开(公告)日：2010-09-14

申请号：US11757731

申请日：2007-06-04

申请人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

发明人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

IPC分类号： H04K1/10 ,  H04Q7/20

CPC分类号： H04L27/2647 ,  H04L5/0048 ,  H04L25/0228

摘要： A receiver uses knowledge of pilot symbols transmitted by a neighboring sector to reduce interference in a received data symbol. The received data symbol is transmitted on one or more data subcarriers in a first sector. Overlapping pilot symbols transmitted on overlapping pilot carriers in a second sector are determined and used to generate channel estimates for the overlapping pilot carriers. The overlapping pilot symbols and pilot channel estimates are then used to reduce interference in the received data symbol.

摘要翻译： 接收机使用由相邻扇区发送的导频符号的知识来减少接收的数据符号中的干扰。 所接收的数据符号在第一扇区中的一个或多个数据子载波上发送。 确定在第二扇区中的重叠导频载波上发送的重叠导频符号，并用于生成重叠导频载波的信道估计。 然后使用重叠导频符号和导频信道估计来减少接收到的数据符号中的干扰。

公开(公告)号：US20100040174A1

公开(公告)日：2010-02-18

申请号：US11993605

申请日：2005-07-01

申请人： Dennis Hui ,  Rajaram Ramesh

发明人： Dennis Hui ,  Rajaram Ramesh

IPC分类号： H04L25/06

CPC分类号： H04L25/063 ,  H04L25/061

摘要： A method and arrangement for estimating a DC offset for a signal received in a radio receiver. The received signal includes a digitally modulated signal component, a DC offset component, and a noise component. When the signal is of a known type, such as a Gaussian Minimum Shift Keying (GMSK)-modulated signal with constant amplitude in a GSM/EDGE cellular radio system, the method exploits the known characteristics of the statistical distribution for the known type of signal to obtain a better estimate of the DC offset. The statistical distribution of the received digitally modulated signal component is first analyzed. That statistical distribution is then compared to the known statistical distribution for the known type of signal to identify differences. The differences are then used to estimate the DC offset. Additional iterations may be performed to further improve the DC estimate.

摘要翻译： 一种用于估计在无线电接收机中接收的信号的DC偏移的方法和装置。 接收到的信号包括数字调制信号分量，DC偏移分量和噪声分量。 当信号是GSM / EDGE蜂窝无线电系统中具有恒定振幅的已知类型的高斯最小移频键控（GMSK）调制信号时，该方法利用了已知类型信号的已知统计分布特征 以获得对DC偏移的更好的估计。 首先分析接收到的数字调制信号分量的统计分布。 然后将统计分布与已知的信号类型的统计分布进行比较以识别差异。 然后使用差异来估计DC偏移。 可以执行另外的迭代以进一步改善DC估计。