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    • 21. 发明专利
    • System and method for acquisition in wireless communication systems
    • 无线通信系统采集系统与方法
    • JP2012257271A
    • 2012-12-27
    • JP2012161397
    • 2012-07-20
    • Qualcomm Incクゥアルコム・インコーポレイテッドQualcomm Incorporated
    • KHANDEKAR AAMODALEXEI GOROKHOVBHUSHAN NAGAPALANKI RAVI
    • H04W52/02H04B1/16H04J11/00H04W72/04
    • H04L27/3809H04L27/2647H04W52/52H04W68/02
    • PROBLEM TO BE SOLVED: To support efficient operation by a terminal in an idle state.SOLUTION: A base station transmits a preamble periodically in each superframe. The preamble includes at least one first OFDM symbol for control information and subsequent at least one second OFDM symbol for paging information. A terminal receives the first and second OFDM symbols and determines a receiver gain on the basis of the received power of the first OFDM symbol, e.g., with an AGC loop having a shorter time constant than the duration of the first OFDM symbol. The terminal processes the second OFDM symbol on the basis of the receiver gain to obtain the paging information. The terminal may operate in an idle state, determine superframes assigned to the terminal, sleep between the assigned superframes, and process the first and second OFDM symbols in each assigned superframe to obtain the paging information.
    • 要解决的问题:为了支持处于空闲状态的终端的有效操作。 解决方案:基站在每个超帧中周期性地发送前导码。 前导码包括用于控制信息的至少一个第一OFDM符号和用于寻呼信息的随后的至少一个第二OFDM符号。 终端接收第一和第二OFDM符号,并且例如使用具有比第一OFDM符号的持续时间更短的时间常数的AGC环路,基于第一OFDM符号的接收功率来确定接收机增益。 终端基于接收机增益处理第二OFDM符号以获得寻呼信息。 终端可以在空闲状态下操作,确定分配给终端的超帧,在分配的超帧之间休眠,并处理每个分配的超帧中的第一和第二OFDM符号以获得寻呼信息。 版权所有(C)2013,JPO&INPIT
    • 23. 发明专利
    • Beacon coding in wireless communications systems
    • 无线通信系统中的信标编码
    • JP2012050095A
    • 2012-03-08
    • JP2011201978
    • 2011-09-15
    • Qualcomm Incクゥアルコム・インコーポレイテッドQualcomm Incorporated
    • RICHARDSON TOMLI HUSHENGJUN Y LEEALEX LEONIDOVLAROIA RAJIVPALANKI RAVIGAVIN HORNASHWIN SAMPATH
    • H04J11/00H04W72/04
    • PROBLEM TO BE SOLVED: To provide methodologies that facilitate transmitting beacon symbols of a beacon message such that a sequence of symbols can satisfy a linear constraint over a field where the field elements can be identified with carriers.SOLUTION: A coding scheme can be applied to a beacon message; the coding scheme can produce a plurality of beacon symbols to transmit on given subcarriers. A receiving device of the beacon symbols decodes a beacon message by receiving less than the total number of symbols in a beacon message and determining the remaining symbol subcarriers based on the linear constraint. Thus, more efficient decoding of beacons is facilitated as well as resolving beacon ambiguity by figuring out which symbols satisfy linear constraints for the symbols, and resolving time and frequency shift by detecting an offset that would result in satisfaction of the linear constraint.
    • 要解决的问题:提供便于发送信标消息的信标符号的方法,使得符号序列可以满足可以用载波识别场元素的场的线性约束。 解决方案:编码方案可应用于信标消息; 编码方案可以产生多个信标符号,以在给定子载波上进行传输。 信标符号的接收装置通过接收少于信标消息中的符号总数来解码信标消息,并且基于线性约束确定剩余符号子载波。 因此,有助于信标的更有效的解码以及通过找出哪些符号满足符号的线性约束来解析信标模糊度,以及通过检测将导致满足线性约束的偏移来解决时间和频率偏移。 版权所有(C)2012,JPO&INPIT
    • 24. 发明专利
    • Pilot and data transmission in mimo (multiple input multiple output) system applying subband multiplexing
    • MIMO(MULTIPLE INPUT MULTIPUL OUTPUT)系统中的引导和数据传输应用子带多路复用
    • JP2011091839A
    • 2011-05-06
    • JP2010270307
    • 2010-12-03
    • Qualcomm Incクゥアルコム・インコーポレイテッドQualcomm Incorporated
    • PALANKI RAVIKHANDEKAR AAMODSUTIVONG ARAK
    • H04J99/00H04J11/00H04J13/10
    • H04B7/04H04L1/1819H04L5/0023H04L5/0048H04L25/0206H04L25/022H04L25/0226H04L25/0228H04L25/0256
    • PROBLEM TO BE SOLVED: To provide a technique to support simultaneous transmission for more terminals in a multiple access system. SOLUTION: In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA, a multitude of transmitters transmit their pilots which are orthogonal to one another using time division multiplexing (TDM), code division multiplexing (CDM), interleaved frequency division multiplexing (IFDM), or localized frequency division multiplexing (LFDMA). A receiver performs complementary demultiplexing (non-multiplexing) on the pilots and derives a channel estimate associated with each transmitter using an MMSE technique or a least-squares technique. The receiver separates data transmissions sent on the same time-frequency block through the use of spatial filter matrices. The receiver derives the spatial filter matrices based on the channel estimates and using also a zero-forcing, MMSE, or maximal ratio combining technique. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种支持多访问系统中更多终端的同时传输的技术。 解决方案:在采用交织FDMA(IFDMA)或集中式FDMA的单载波频分多址(SC-FDMA)系统中,多个发射机使用时分复用(TDM)来发射彼此正交的导频 ),码分复用(CDM),交错频分复用(IFDM)或局域频分复用(LFDMA)。 接收机在导频上执行互补解复用(非多路复用),并且使用MMSE技术或最小二乘法技术导出与每个发射机相关联的信道估计。 接收机通过使用空间滤波器矩阵分离在相同时间频率块上发送的数据传输。 接收机基于信道估计导出空间滤波器矩阵,并使用零强制,MMSE或最大比组合技术。 版权所有(C)2011,JPO&INPIT
    • 29. 发明专利
    • Synchronous tdm-based communication in dominant interference scenario
    • 主要干扰场景同步基于TDM的通信
    • JP2013062841A
    • 2013-04-04
    • JP2012240585
    • 2012-10-31
    • Qualcomm Incクゥアルコム・インコーポレイテッドQualcomm Incorporated
    • KAPIL BHATTADPALANKI RAVI
    • H04W16/16H04J11/00H04W72/04H04W88/02
    • H04W72/082H04J3/02H04J11/005H04J11/0069H04W16/14H04W16/32
    • PROBLEM TO BE SOLVED: To support communication avoiding interference in a heterogeneous network.SOLUTION: Communication in a dominant interference scenario is supported by reserving a plurality of subframes for a weaker base station observing high interference from a strong interfering base station. In another aspect, interference due to a first reference signal from a first station (for example, a base station) can be mitigated by canceling the interference at a second station (for example, UE) or by selecting a plurality of different resources for sending a second reference signal by the second station (for example, another base station) to avoid collision with the first reference signal. In another aspect, a relay transmits in an MBSFN mode in a plurality of subframes in which it listens to a macro base station, and in a regular mode in a plurality of subframes in which it transmits to a plurality of pieces of UE. In another aspect, a station transmits more TDM control symbols than a dominant interferer.
    • 要解决的问题:支持避免异构网络干扰的通信。 解决方案:通过为较弱的基站预留来自强干扰基站的高干扰的较弱子帧来支持主要干扰场景中的通信。 在另一方面,可以通过消除第二站(例如,UE)的干扰或通过选择多个不同的资源来发送来自第一站(例如,基站)的第一参考信号的干扰 由第二站(例如,另一个基站)的第二参考信号,以避免与第一参考信号的冲突。 在另一方面,中继在MBSFN模式中,在其收听宏基站的多个子帧中发送,并且在多个子帧中向多个子帧发送多个子帧。 另一方面,站发送比主要干扰源更多的TDM控制符号。 版权所有(C)2013,JPO&INPIT