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    SOFT HANDOFF WITH INTERFERENCE CANCELLATION IN A WIRELESS FREQUENCY HOPPING COMMUNICATION SYSTEM
    91.
    发明公开
    SOFT HANDOFF WITH INTERFERENCE CANCELLATION IN A WIRELESS FREQUENCY HOPPING COMMUNICATION SYSTEM 有权
    SOFT-FAR与清除卡纸实现了一种无线频跳频通信系统

    公开(公告)号：EP1625665A4

    公开(公告)日：2011-04-20

    申请号：EP04751716

    申请日：2004-05-07

    Applicant: QUALCOMM INC

    Inventor： AGRAWAL AVNEESH

    IPC: H04B1/713 ,  H04L27/26 ,  H04W36/18 ,  H04W72/08 ,  H04W36/00

    CPC classification number: H04L27/2601 ,  H04B1/715 ,  H04B2001/7152 ,  H04W24/00 ,  H04W28/04 ,  H04W36/18 ,  H04W72/04

    Abstract: Techniques are provided to support soft handoff in a frequency hopping OFDMA system. Each sector concurrently supports "non-handoff" users and "soft-handoff" users. A non-handoff user communicates with only one sector, and a soft-handoff user communicates with multiple sectors simultaneously. Non-handoff users are assigned traffic channels by their sole sectors, and soft-handoff users are assigned traffic channels by their "serving" sectors. For each sector, the traffic channels assigned to the non-handoff users are orthogonal to one another and may or may not be orthogonal to the traffic channels assigned to the soft-handoff users. Each sector processes its received signal and recovers the data transmissions from the non-handoff users of that sector. Each sector then estimates the interference due to the non-handoff users and cancels the interference from the received signal. Each sector further processes its interference-canceled signal to recover the data transmissions from the soft-handoff users.

    POWER CONTROL AND SCHEDULING IN AN OFDM SYSTEM
    92.
    发明公开
    POWER CONTROL AND SCHEDULING IN AN OFDM SYSTEM 审中-公开
    功率控制和分布的ienem OFDM系统

    公开(公告)号：EP1623241A4

    公开(公告)日：2012-01-04

    申请号：EP04785551

    申请日：2004-05-14

    Applicant: QUALCOMM INC

    Inventor： NAGUIB AYMAN FAWZY ,  AGRAWAL AVNEESH ,  SUTIVONG ARAK

    IPC: G01R31/08 ,  H04B7/005 ,  H04L20060101 ,  H04L5/00 ,  H04L27/26

    CPC classification number: H04W52/24 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0058 ,  H04L5/006

    Abstract: A system and method for power control and scheduling of sub-carriers in an OFDM communication system. The receiver dynamic range can be minimized by a power control loop that attempts to maintain received power over a noise floor in a predetermined range. If the received power relative to a noise floor in allocated sub-carriers exceeds the predetermined range and the total received power is at the minimum, the scheduling system allocates an additional sub-carrier to the communication link. Additionally, if the received power relative to the noise floor is less than the predetermined range minimum, and the total received power is at a maximum, the scheduling system de-allocates a sub-carrier from the communication link. The scheduling system may also adjust an encoding rate to maintain a relatively constant symbol rate in each sub-carrier.

    PEAK-TO-AVERAGE POWER RATIO MANAGEMENT FOR MULTI-CARRIER MODULATION IN WIRELESS COMMUNICATION SYSTEMS
    95.
    发明公开
    PEAK-TO-AVERAGE POWER RATIO MANAGEMENT FOR MULTI-CARRIER MODULATION IN WIRELESS COMMUNICATION SYSTEMS 有权
    管理上到平均水平的表现欲了解更多支持调制在无线通信系统中的关系

    公开(公告)号：EP1595345A4

    公开(公告)日：2009-09-23

    申请号：EP04711906

    申请日：2004-02-17

    Applicant: QUALCOMM INC

    Inventor： VIJAYAN RAJIV ,  AGRAWAL AVNEESH ,  JHA SANJAY K

    IPC: H04J1/00 ,  H04B7/005 ,  H04L5/00 ,  H04L5/02 ,  H04L27/26 ,  H04W52/34 ,  H04W72/04

    CPC classification number: H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0066 ,  H04L27/2614 ,  H04W52/343 ,  H04W52/367

    Abstract: Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.

    Abstract translation: 技术来管理的峰 - 平均值在无线通信系统中的多载波调制功率比（PAPR）。 不同的终端中的多址系统可以具有不同的所需的发射功率。 载波分配给每个终端的数量是由依赖于它的所需发送功率。 具有较高的所需发射功率的终端可被分配较少的载流子（具有较小PAPR相关联），以允许所述功率放大器以更高的功率电平操作。 由于功率放大器在较低的功率水平操作具有较低要求的发射功率的终端可被分配一个以上载波（具有较高PAPR相关联）。 的特定载波分配给因此可以通过它们的发射功率电平来确定的开采的端子，以减少外的带外发射。 具有较高的所需发送功率的终端可以与工作频带的中部附近载波进行分配，并以较低的所需发射功率的终端可以与附近的频带边缘载波来分配。

    PILOT TRANSMISSION AND CHANNEL ESTIMATION WITH PILOT WEIGHTING
    96.
    发明公开
    PILOT TRANSMISSION AND CHANNEL ESTIMATION WITH PILOT WEIGHTING 有权

    公开(公告)号：EP1882324A4

    公开(公告)日：2017-12-20

    申请号：EP06770384

    申请日：2006-05-16

    Applicant: QUALCOMM INC

    Inventor： GORE DHANANJAY ASHOK ,  AGRAWAL AVNEESH

    IPC: H04L25/00 ,  H04J11/00

    CPC classification number: H04B1/69 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0226 ,  H04L25/0232 ,  H04L27/2647

    Abstract: Techniques to perform channel estimation with pilot weighting are described. A receiver receives at least one transmission symbol for a pilot transmitted by a transmitter. Each transmission symbol may be generated with a single-carrier multiplexing scheme (e.g., IFDMA or LFDMA) or a multi-carrier multiplexing scheme (e.g., OFDMA). The receiver processes each received transmission symbol and obtains received pilot values. The receiver may derive an interference estimate based on the received pilot values and may estimate the reliability of the received pilot values based on the interference estimate. The receiver determines weights for the received pilot values based on the transmitted pilot values, the estimated reliability of the received pilot values, and/or other information. The receiver derives a channel estimate based on the received pilot values and the weights. The receiver then performs data detection (e.g., equalization) on received data values with the channel estimate.

    INTERFERENCE MANAGEMENT FOR SOFT HANDOFF AND BROADCAST SERVICES IN A WIRELESS FREQUENCY HOPPING COMMUNICATION SYSTEM
    97.
    发明公开
    INTERFERENCE MANAGEMENT FOR SOFT HANDOFF AND BROADCAST SERVICES IN A WIRELESS FREQUENCY HOPPING COMMUNICATION SYSTEM 有权
    故障管理用于软WEITERREICHUNGS-和广播服务在无线跳频通信系统

    公开(公告)号：EP1665820A4

    公开(公告)日：2013-03-13

    申请号：EP04756022

    申请日：2004-06-23

    Applicant: QUALCOMM INC

    Inventor： AGRAWAL AVNEESH

    IPC: H04B1/69 ,  H04W8/26 ,  H04W28/04 ,  H04W36/18 ,  H04W48/16

    CPC classification number: H04B1/715 ,  H04B2001/7154 ,  H04L5/0021 ,  H04L5/0044 ,  H04L5/0089 ,  H04W8/26 ,  H04W36/18 ,  H04W48/16

    Abstract: Techniques are provided to manage interference for soft handoff and broadcast services in a wireless frequency hopping communication system (e.g., an OFDMA system). These techniques may be used for the forward and reverse links. In a first scheme, an FH function f sho (r,T) is used for soft-handoff users, an FH function f s i (k,T) is used for users not in soft handoff in each sector s i , and the FH function f s i (k,T) is modified to be orthogonal to the FH function f sho (r,T) if and when necessary. In a second scheme, the FH function f sho (r,T) used for soft-handoff users is defined to be orthogonal to or have low correlation with the FH function f s i (k,T) used for users not in soft handoff in each sector s i , so that modification of the FH function f s i (k,T) is not needed. The FH function f s i (k,T) for each sector may be defined to be pseudo-random with respect to the FH functions f s i (k,T) for other sectors.

    RATE ADAPTIVE TRANSMISSION SCHEME FOR MIMO SYSTEMS
    99.
    发明公开
    RATE ADAPTIVE TRANSMISSION SCHEME FOR MIMO SYSTEMS 有权
    速率自适应传输策略MIMO系统

    公开(公告)号：EP1570579A4

    公开(公告)日：2007-11-07

    申请号：EP03809054

    申请日：2003-10-14

    Applicant: QUALCOMM INC

    Inventor： AGRAWAL AVNEESH ,  VIJAYAN RAJIV ,  KADOUS TAMER

    IPC: H04B7/00 ,  H04B7/005 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06

    CPC classification number: H04L1/0618 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0465 ,  H04B7/0615 ,  H04B7/0891 ,  H04W52/34 ,  H04W52/42

    Abstract: A rate adaptive transmission scheme for MIMO systems, which can transmit a variable number of data symbol streams, provide transmit diversity for each data symbol stream, and fully utilize the total transmit power of the system and the full power of each antenna. In one method, at least one data symbol stream is received for transmission from a plurality of antennas. Each data symbol stream is scaled with a respective weight corresponding to the amount of transmit power allocated to that stream. The scaled data symbol stream(s) are multiplied with a transmit basis matrix to provide a plurality of transmit symbol streams for the plurality of antennas.; The transmit basis matrix (e.g., a Walsh-Hadamard matrix or a DFT matrix) is defined such that each data symbol stream is transmitted from all antennas and each transmit symbol stream is transmitted at (or near) the full power for the associated antenna.

    Gestión de interferencia para diferentes tecnologías de comunicación inalámbrica
    100.
    发明专利
    Gestión de interferencia para diferentes tecnologías de comunicación inalámbrica 未知

    公开(公告)号：ES2834173T3

    公开(公告)日：2021-06-16

    申请号：ES09792481

    申请日：2009-09-11

    Applicant: QUALCOMM INC

    Inventor： GAAL PETER ,  AGRAWAL AVNEESH

    IPC: H04W16/14 ,  H04W72/08

    Abstract: Un procedimiento de uso de una red de comunicación inalámbrica que funciona de acuerdo con una tecnología de comunicación de red, incluyendo la red de comunicación inalámbrica un punto de acceso (102), estando el procedimiento caracterizado por un dispositivo móvil (104): que recibe señales desde un transmisor de una tecnología de comunicación dispar potencialmente interferida por comunicaciones sobre adjudicaciones de recursos desde el punto de acceso; que determina si un producto de orden armónico de enésima potencia de una adjudicación de recursos desde el punto de acceso está en la banda de frecuencia del transmisor, donde n es 2, 3, ⋯; que determina (504) uno o más períodos de tiempo durante los que se comunican los dispositivos de la tecnología de comunicación dispar; y si el producto de orden armónico de enésima potencia de una adjudicación de recursos desde el punto de acceso está en la banda de frecuencia, que determina la interferencia potencial al transmisor de la tecnología de comunicación dispar durante los uno o más períodos de tiempo, y que transmite uno o más parámetros relacionados con la interferencia al punto de acceso.

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