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    • 2. 发明申请
    • METHODS AND APPARATUS OF PROVIDING TRANSMIT DIVERSITY IN A MULTIPLE ACCESS WIRELESS COMMUNICATION SYSTEM
    • 在多路访问无线通信系统中提供传输多样性的方法和装置
    • WO2004066104A2
    • 2004-08-05
    • PCT/US2004001979
    • 2004-01-23
    • FLARION TECHNOLOGIES INCLAROIA RAJIVLI JUNYIRANGAN SUNDEEPSRINIVASAN MURARI
    • LAROIA RAJIVLI JUNYIRANGAN SUNDEEPSRINIVASAN MURARI
    • H04W88/18H04B7/06G06F
    • H04B7/0626
    • Methods and apparatus for providing channel diversity to wireless terminals (WTs) in a manner that reduces the latency between the time a WT encounters satisfactory channel conditions are described. A plurality of communications channels with different physical characteristics are maintained in a cell by a base station (BS). Each WT monitors multiple channels and maintains multiple channel estimates at the same time so that rapid switching between channels is possible. Channel quality information is conveyed from each WT to the BS. The WT or BS selects a channel based on the measured channel quality. By supporting multiple channels and by introducing periodic variations into the channels in various embodiments, the time before a WT encounters a channel with good or acceptable channel conditions is minimized even if the WT does not change location. Multiple antennas are used at the BS to support numerous channels simultaneously, e.g., by controlling antenna patterns.
    • 描述了以降低WT遇到令人满意的信道条件的时间之间的等待时间的方式向无线终端(WT)提供信道分集的方法和装置。 具有不同物理特性的多个通信信道由基站(BS)保持在小区中。 每个WT监视多个信道并同时维持多个信道估计,使得信道之间的快速切换是可能的。 信道质量信息从每个WT传送到BS。 WT或BS基于测量的信道质量来选择信道。 通过支持多个信道并且在各种实施例中引入周期性变化到信道中,即使WT不改变位置,WT遇到具有良好或可接受的信道条件的信道之前的时间被最小化。 在BS处使用多个天线来同时支持多个信道,例如通过控制天线方向图。
    • 3. 发明申请
    • EFFICIENT PAGING IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中的高效寻呼
    • WO2005125234A3
    • 2007-12-27
    • PCT/US2005020257
    • 2005-06-09
    • FLARION TECHNOLOGIES INCLAROIA RAJIVLI JUNYIRANGAN SUNDEEPHANDE PRASHANTH
    • LAROIA RAJIVLI JUNYIRANGAN SUNDEEPHANDE PRASHANTH
    • H04W68/00H04W68/02
    • H04W68/025
    • Methods and apparatus for efficient two-stage paging wireless communications systems are described. Wireless terminals (300) are assigned to paging groups. A few first paging message information bits are modulated (using non-coherent modulation) into a first paging signal and communicated from a base station to wireless terminals (200). WTs wake-up, receive the first paging signal and quickly ascertain whether its paging group should expect a second paging signal, if so, the WT is operated to receive the second paging signal; otherwise, the WT goes back to sleep conserving power. The base station modulates (using coherent modulation) a number of second message information bits into a second paging signal and transmits the signal to WTs. From the information in first and second paging signals, a WT can determine that it is the paged WT and process the paging instructions. The intended paged WT can transmit an acknowledgement signal on a dedicated uplink resource.
    • 描述了用于有效的两阶段寻呼无线通信系统的方法和装置。 无线终端(300)被分配给寻呼组。 几个第一寻呼消息信息比特被调制(使用非相干调制)到第一寻呼信号中并从基站传送到无线终端(200)。 WT唤醒,接收第一个寻呼信号,并快速确定其寻呼组是否应该预期第二个寻呼信号,如果是,则操作WT接收第二寻呼信号; 否则,WT回去睡眠节省电力。 基站将多个第二消息信息比特(使用相干调制)调制成第二寻呼信号,并将该信号发送给WT。 根据第一和第二寻呼信号中的信息,WT可以确定它是寻呼WT并处理寻呼指令。 预期的寻呼WT可以在专用上行链路资源上发送确认信号。
    • 5. 发明申请
    • CONTROLLED SUPERPOSITION CODING IN MULTI-USER COMMUNICATION SYSTEMS
    • 多用户通信系统中的控制代码编码
    • WO2004075470A3
    • 2004-12-09
    • PCT/US2004004947
    • 2004-02-19
    • FLARION TECHNOLOGIES INCLAROIA RAJIVLI JUNYISRINIVASAN MURARI
    • LAROIA RAJIVLI JUNYISRINIVASAN MURARI
    • H04B7/005H04L5/04H04L27/34H04W52/24H04W52/28H04L25/03H04B1/00H04B7/00
    • H04W52/283H04L1/1607H04L1/1861H04L5/04H04L27/2604H04L27/3488H04W52/24
    • Methods of using superposition coding in a communications systems, e.g., a multi-user communications system. Superpostion coding in accordance with the invention occurs in the case of an uplink (1212, 1216) by transmissions of different wireless terminals (1204, 1206) transmitting using the same communications resource, e.g., simultaneously transmitting using the same frequencies. The signals combine in the communications channel resulting in one transmission being superimposed on the other transmission. The device, e.g., base station (1207), receiving the superimposed signals uses superposition decoding techniques to recover both signals. To obtain the benefit of the superposition, assignments of channel segments to multiple wireless terminals is controlled by the base station and/or transmission power levels are controlled by on or more wireless terminals sharing the same uplink communications resource, e.g., time slot, to make sure that the received signals from the different devices will have different received power levels making superposition decoding possible.
    • 在通信系统(例如,多用户通信系统)中使用叠加编码的方法。 在通过使用相同通信资源发送的不同无线终端(1204,1206)的传输的上行链路(1212,1216)的情况下发生根据本发明的超扩频编码,例如,使用相同频率同时发射。 信号在通信信道中组合,导致一个传输被叠加在另一个传输上。 接收叠加信号的设备,例如基站(1207)使用叠加解码技术来恢复两个信号。 为了获得叠加的优点,信道段对多个无线终端的分配由基站控制,并且/或发射功率电平由共享相同上行链路通信资源(例如时隙)的多个无线终端控制,以使 确保来自不同设备的接收信号将具有不同的接收功率电平,从而使叠加解码成为可能。
    • 7. 发明申请
    • METHODS AND APPARATUS FOR GENERATING, COMMUNICATING, AND/OR USING INFORMATION RELATING TO SELF-NOISE
    • 用于生成,传播和/或使用与自发信息有关的信息的方法和装置
    • WO2007075736A3
    • 2008-05-29
    • PCT/US2006048513
    • 2006-12-20
    • QUALCOMM INCRANGAN SUNDEEPLAROIA RAJIVDAS ARNABLI JUNYIFAN JOHN
    • RANGAN SUNDEEPLAROIA RAJIVDAS ARNABLI JUNYIFAN JOHN
    • H04W24/10
    • H04W24/10H04B17/24H04B17/336
    • A wireless terminal measures the received power of a tone corresponding to an intention base station null output, measures the received power of pilot signals, and determines a signal to noise ratio of the received pilot signal. The wireless terminal calculates a downlink signal to noise ratio saturation level representative of the SNR of a received downlink signal that the wireless terminal would measure on a received signal transmitted by the base station at infinite power. The calculated downlink signal to noise ratio saturation level is a function of the determined interference power, the measured received pilot signal power, and the determined pilot signal SNR. A report is generated corresponding to one of a plurality of quantized levels, the selected quantized level being the closest representation to the calculated downlink signal to noise ratio saturation level. The generated report is communicated using a dedicated control channel segment in a predetermined uplink timing structure.
    • 无线终端测量与意图基站空输出对应的音调的接收功率,测量导频信号的接收功率,并确定接收到的导频信号的信噪比。 无线终端计算表示无线终端将以无限大功率发送的接收信号对接收到的下行链路信号的SNR进行SNR测量的下行链路信噪比饱和度。 所计算的下行链路信噪比饱和电平是所确定的干扰功率,测量的接收导频信号功率和确定的导频信号SNR的函数。 产生对应于多个量化电平中的一个的报告,所选择的量化电平是与所计算的下行链路信噪比饱和电平最接近的表示。 使用专用控制信道段在预定的上行链路定时结构中传送所生成的报告。
    • 9. 发明申请
    • METHOD OF REDUCING INTERFERENCE
    • 减少干扰的方法
    • WO2009067465A2
    • 2009-05-28
    • PCT/US2008083945
    • 2008-11-18
    • QUALCOMM INCLAROIA RAJIVRANGAN SUNDEEPLI JUNYIRICHARDSON THOMASTAVILDAR SAURABH
    • LAROIA RAJIVRANGAN SUNDEEPLI JUNYIRICHARDSON THOMASTAVILDAR SAURABH
    • H04B1/707
    • H04L27/2647H04B1/7103H04B7/0854H04B7/0857H04B2201/70702
    • Various schemes for reducing effects of interference within communication systems are disclosed. A transmitter transmits a signal in a first time interval and a scrambled version of the signal in a second time interval, which does not overlap with the first time interval. A receiver receives a composite signal including a signal transmitted from the desired transmitter as well as signals from interferers in the first or the second time interval. The receiver determines a dominant interferer and obtains knowledge of signal scrambling done by the interferer as well as the desired transmitter by sensing an identification associated with the interferer or the desired transmitter. This knowledge is employed to determine coefficients for combining the received composite signals received in the first and the second time interval in order to recover the desired signal in a manner that maximizes the SNR associated with the desired signal or completely cancels the dominant interference.
    • 公开了用于减少通信系统内的干扰影响的各种方案。 发射机在第一时间间隔中发送信号,并在不与第一时间间隔重叠的第二时间间隔中发送信号的加扰版本。 接收机在第一或第二时间间隔内接收包括从期望发射机发送的信号以及来自干扰源的信号的复合信号。 接收机通过检测与干扰源或期望的发射机相关的标识,确定主要干扰源并获得由干扰源以及期望的发射机完成的信号加扰知识。 该知识被用于确定用于组合在第一和第二时间间隔中接收的复合信号的系数,以便以最大化与期望信号相关联的SNR或完全消除主要干扰的方式来恢复期望信号。
    • 10. 发明申请
    • OVERHEAD SIGNALING IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中的超声信号
    • WO2007121333A2
    • 2007-10-25
    • PCT/US2007066583
    • 2007-04-13
    • QUALCOMM INCLEONIDOV ALEXANDERJIN HUILAROIA RAJIVLI JUNYISRINIVASAN MURARI
    • LEONIDOV ALEXANDERJIN HUILAROIA RAJIVLI JUNYISRINIVASAN MURARI
    • H04L27/26
    • H04L27/2608
    • Improved ways of communicating assignment signals using flash signaling are described, e.g., for wireless terminals with low SNR, that are more robust against large variation of channel gains due to e.g., frequency selective fading and fast fading in time. Coding and modulation methods and apparatus that have excellent properties against symbol erasures are described. The use of flash signaling provides an improved assignment channel having strong performance on the fading channel without compromising the performance on the AWGN channel. In one exemplary embodiment, the coding and modulation method can tolerate up to 5 erased symbols out of 8 transmitted symbols. One embodiment reduces or minimizes the sector interference on the flash assignment by improving or maximizing orthogonality between different sectors. In addition, one embodiment describes improved ways of swapping flash assignment tone-symbols in the presence other high priority signals, like sector pilots and sector null pilots.
    • 例如,对于具有低SNR的无线终端,使用闪信号进行传送分配信号的改进方式对于由于例如频率选择性衰落和时间上的快速衰落而导致的信道增益的大变化更加鲁棒。 描述了具有针对符号擦除的优异特性的编码和调制方法和装置。 闪光信令的使用提供了在衰落信道上具有强性能的改进的分配信道,而不损害AWGN信道上的性能。 在一个示例性实施例中,编码和调制方法可以容忍8个发送的符号中多达5个擦除的符号。 一个实施例通过改善或最大化不同扇区之间的正交性来减少或最小化闪存分配上的扇区干扰。 此外,一个实施例描述了在存在其他高优先级信号(如扇区导频和扇区空导频)的情况下交换闪存分配音调符号的改进方式。