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    Rate adaptive transmission scheme for mimo system
    81.
    发明专利
    Rate adaptive transmission scheme for mimo system 有权
    用于MIMO系统的速率自适应传输方案

    公开(公告)号：JP2011147146A

    公开(公告)日：2011-07-28

    申请号：JP2011028975

    申请日：2011-02-14

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： AGRAWAL AVNEESH ,  VIJAYAN RAJIV ,  KADOUS TAMER

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

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

    Abstract: PROBLEM TO BE SOLVED: To provide a rate adaptive transmission scheme for MIMO (Multiple Input Multiple Output) systems, which can transmit a variable number of data symbol streams.
    SOLUTION: The rate adaptive transmission scheme for MIMO systems provides transmit diversity for each data symbol stream and fully utilize the total transmit power of the system and the full power of each antenna. 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 streams are multiplied by a transmit basis matrix to provide a plurality of transmit symbol streams for the plurality of antennas. The transmit basis matrix is defined such that each data symbol stream is transmitted from all antennas and each transmit symbol stream is transmitted at the full power for the associated antenna.
    COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供可以发送可变数量的数据符号流的MIMO（多输入多输出）系统的速率自适应传输方案。 解决方案：MIMO系统的速率自适应传输方案为每个数据符号流提供发射分集，并充分利用系统的总发射功率和每个天线的全功率。 接收至少一个数据符号流以从多个天线发射。 每个数据符号流用对应于分配给该流的发射功率的量的相应权重进行缩放。 缩放的数据符号流被乘以发射基矩阵以提供多个天线的多个发射符号流。 发送基矩阵被定义为使得每个数据符号流从所有天线发送，并且每个发送符号流以相关天线的全功率发送。 版权所有（C）2011，JPO＆INPIT

    Rate prediction in fractional reuse system
    82.
    发明专利
    Rate prediction in fractional reuse system 有权
    分数再利用系统中的速率预测

    公开(公告)号：JP2011120280A

    公开(公告)日：2011-06-16

    申请号：JP2011028804

    申请日：2011-02-14

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： KHANDEKAR AAMOD ,  AGRAWAL AVNEESH

    IPC: H04W72/04 ,  H04J1/00 ,  H04J11/00 ,  H04W16/02 ,  H04W16/12 ,  H04W24/10 ,  H04W72/08

    CPC classification number: H04L1/0015 ,  H04L1/0002 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/1812 ,  H04L1/20 ,  H04L5/0007 ,  H04L5/0012 ,  H04L5/006 ,  H04L27/2601 ,  H04W16/02 ,  H04W16/12

    Abstract: PROBLEM TO BE SOLVED: To provide an apparatus and method for rate prediction in a wireless communication system having fractional frequency reuse. SOLUTION: A wireless communication system implementing Orthogonal Frequency Division Multiple Access (OFDMA) can implement a fractional frequency reuse plan where a portion of carriers is allocated to terminals without anticipating handoff, and another portion of the carriers is reserved for terminals having a higher probability of handoff. Each of the portions can define a reuse set. The terminals can be constrained to frequency hop within a reuse set. The terminal can also be configured to determine a reuse set based on a present assignment of a subset of carriers. The terminal can determine a channel estimated value and a channel quality indicator based in part on at least the present reuse set. The terminal can report the channel quality indicator to a source, which can determine a rate based on an index value. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种具有分数频率重用的无线通信系统中的速率预测的装置和方法。 解决方案：实现正交频分多址（OFDMA）的无线通信系统可以实现分数频率复用计划，其中一部分载波被分配给终端，而不预期切换，另一部分载波被保留用于具有 更高的切换概率。 每个部分可以定义重用集合。 终端可以被限制在重用集合内的跳频。 终端还可以被配置为基于载波子集的当前分配来确定重用集合。 所述终端可以部分地至少基于所述重用集合来确定信道估计值和信道质量指示符。 终端可以将信道质量指示符报告给源，其可以基于索引值来确定速率。 版权所有（C）2011，JPO＆INPIT

    Constrained hopping in wireless communication systems
    84.
    发明专利
    Constrained hopping in wireless communication systems 有权
    在无线通信系统中受约束

    公开(公告)号：JP2011010334A

    公开(公告)日：2011-01-13

    申请号：JP2010173703

    申请日：2010-08-02

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： KHANDEKAR AAMOD ,  AGRAWAL AVNEESH

    IPC: H04B1/713 ,  H04J99/00

    CPC classification number: H04B1/713 ,  H04B7/02 ,  H04L1/0029 ,  H04L5/0023 ,  H04L5/0039 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0094 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0232

    Abstract: PROBLEM TO BE SOLVED: To provide a method for channel estimation in a wireless communication system operating on a given frequency band.SOLUTION: Resource allocation for a transmission to a wireless device is provided. A frequency band 400 is partitioned into at least two contiguous subbands. A determination is made whether it is desirable to transmit in a single subband or in more than one subband (404, 408, 412, 416). The transmission is assigned either to occur in the single subband or to operate in more than one subband. If the transmission is restricted to one subband, the hop pattern is also restricted to subcarriers within the particular subband.

    Abstract translation: 要解决的问题：提供在给定频带上操作的无线通信系统中的信道估计方法。解决方案：提供用于向无线设备的传输的资源分配。 频带400被划分成至少两个连续的子带。 确定是否期望在单个子带中或在多于一个子带（404,408,412,416）中进行发送。 该传输被分配在单个子带中发生或者在多于一个子带中操作。 如果传输被限制到一个子带，则跳频模式也被限制在特定子带内的子载波上。

    Multi-antenna system to simultaneous support of miso and mimo receivers
    86.
    发明专利
    Multi-antenna system to simultaneous support of miso and mimo receivers 有权
    多天线系统同时支持MISO和MIMO接收机

    公开(公告)号：JP2010239628A

    公开(公告)日：2010-10-21

    申请号：JP2010109109

    申请日：2010-05-11

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： GORE DHANANJAY ,  AGRAWAL AVNEESH ,  KADOUS TAMER

    IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L25/02 ,  H04L27/26

    CPC classification number: H04L25/0226 ,  H04B7/0452 ,  H04B7/0684 ,  H04L27/2613

    Abstract: PROBLEM TO BE SOLVED: To provide efficient pilot transmission system for multi-antenna communication system.
    SOLUTION: In one pilot transmission scheme, a first set of T scaled pilot symbols is generated with a first training vector and transmitted (e.g., continuously) from T transmit antennas, where T>1. If MIMO receiver(s) are to be supported by the system, then at least T-1 additional sets of T scaled pilot symbols are generated with at least T-1 additional training vectors and transmitted from the T transmit antennas. The training vectors are for different (e.g., orthogonal) spatial directions. Each MISO receiver can estimate its MISO channel based on the first set of scaled pilot symbols. Each MIMO receiver can estimate its MIMO channel based on the first and additional sets of scaled pilot symbols.
    COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：为多天线通信系统提供有效的导频传输系统。 解决方案：在一个导频传输方案中，用第一训练向量生成第一组T比例导频符号，并从T个发射天线发射（例如，连续地），其中T> 1。 如果MIMO接收机将被系统支持，则至少T-1个额外的T比例导频符号集合至少产生T-1个附加训练向量并从T个发射天线发射。 训练矢量用于不同的（例如正交的）空间方向。 每个MISO接收机可以基于第一组缩放的导频符号来估计其MISO信道。 每个MIMO接收机可以基于第一个和额外的缩放导频符号集来估计其MIMO信道。 版权所有（C）2011，JPO＆INPIT

    Interference management for broadcast service and soft handoff in wireless frequency hopping communication system
    88.
    发明专利
    Interference management for broadcast service and soft handoff in wireless frequency hopping communication system 有权
    宽带无线通信系统中广播业务和软件干扰的干扰管理

    公开(公告)号：JP2009296602A

    公开(公告)日：2009-12-17

    申请号：JP2009159659

    申请日：2009-07-06

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： AGRAWAL AVNEESH

    IPC: H04B1/713 ,  H04J1/00 ,  H04J11/00 ,  H04W4/06 ,  H04W8/26 ,  H04W28/04 ,  H04W36/18 ,  H04W48/16 ,  H04W72/04 ,  H04W72/08

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

    Abstract: PROBLEM TO BE SOLVED: To provide techniques to manage interference for broadcast services and soft handoff in a wireless frequency hopping communication system (e.g., an OFDMA system). SOLUTION: In a first scheme, an FH function (r, T) is used for soft-handoff users, an FH function (k, T) is used for users not in soft handoff in each sector, and the FH function (k, T) is modified to be orthogonal to the FH function (f) (r, T), if and when it becomes necessary. In a second scheme, the FH function (r, T) used for soft-handoff users is defined to be orthogonal to or have low correlation with the FH function (k, T) used for users not in soft handoff in each sector Si, so that the modification of the FH function (k, T) is not needed. The FH function (k, T) for each sector is defined so as to be pseudo-random, with respect to the FH functions (k, T) for other sectors. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供在无线跳频通信系统（例如，OFDMA系统）中管理广播服务的干扰和软切换的技术。 解决方案：在第一种方案中，FH功能（r，T）用于软切换用户，FH功能（k，T）用于每个扇区中不处于软切换的用户，FH功能 （k，T）被修改为与FH函数（f）（r，T）正交，如果和必要的话。 在第二种方案中，用于软切换用户的FH功能（r，T）定义为与每个扇区Si中不处于软切换的用户的FH功能（k，T）正交或具有低相关性， 因此不需要对FH功能（k，T）进行修改。 每个扇区的FH功能（k，T）相对于其他扇区的FH功能（k，T）被定义为伪随机的。 版权所有（C）2010，JPO＆INPIT

    Method and cdma system for enabling multiple transmitters to share a single cdm channel
    89.
    发明专利
    Method and cdma system for enabling multiple transmitters to share a single cdm channel 有权
    用于启用多个发射机以分享单个CDM通道的方法和CDMA系统

    公开(公告)号：JP2005006346A

    公开(公告)日：2005-01-06

    申请号：JP2004210936

    申请日：2004-07-20

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： AGRAWAL AVNEESH ,  BUTLER BRIAN K

    IPC: H04B1/04 ,  H04B7/216 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/18 ,  H04Q7/38 ,  H04B1/707

    CPC classification number: H04J13/0048 ,  H04J13/18

    Abstract: PROBLEM TO BE SOLVED: To provide a system and method for enabling multiple transmitters to share a single code division multiplexed (CDM) or code division multiple access (CDMA) channel, using orthogonal waveforms. SOLUTION: A set of orthogonal channelizing codes Wi(t) is generated, and each transmitter is allocated orthogonal channelizing codes and pseudo-noise polynominals in a predetermined manner. The transmitters channelize each user signal using an orthogonal channelizing code Wi(t), and spread each user signal using a pseudo-noise (PN) spreading code. Each transmitter employs the same PN spreading codes and time offsets. Additionally, neither a single orthogonal channelizing code is assigned to more than one transmitter, during the period they are sharing a CDM channel. The spread signals are summed at each transmitter prior to transmission as a composite signal. The offsets and the frequencies of the signals are corrected in advance. COPYRIGHT: (C)2005,JPO&NCIPI

    Abstract translation: 要解决的问题：提供一种使多个发射机能够使用正交波形共享单个码分复用（CDM）或码分多址（CDMA）信道的系统和方法。 解决方案：产生一组正交信道化码Wi（t），并且以预定的方式为每个发射机分配正交信道化码和伪噪声多项式。 发射机使用正交信道化码Wi（t）对每个用户信号进行信道化，并且使用伪噪声（PN）扩展码来扩展每个用户信号。 每个发射机采用相同的PN扩展码和时间偏移。 另外，在共享CDM信道期间，单个正交信道化码都不被分配给多于一个的发射机。 扩展信号在发送之前的每个发射机处作为复合信号相加。 预先校正信号的偏移量和频率。 版权所有（C）2005，JPO＆NCIPI

    INTERFERENCE AND NOISE ESTIMATION IN AN OFDM SYSTEM
    90.
    发明公开
    INTERFERENCE AND NOISE ESTIMATION IN AN OFDM SYSTEM 审中-公开
    间断或噪声估计IN A OFDM系统

    公开(公告)号：EP1623195A4

    公开(公告)日：2011-08-31

    申请号：EP04752264

    申请日：2004-05-14

    Applicant: QUALCOMM INC

    Inventor： SUTIVONG ARAK ,  NAGUIB AYMAN FAWZY ,  AGRAWAL AVNEESH

    IPC: G01H1/00 ,  G01H20060101 ,  H04J11/00 ,  H04L1/20 ,  H04L27/26

    CPC classification number: H04L1/20 ,  H04L27/2647

    Abstract: Noise and interference can be independently measured in a multiple user Orthogonal Frequency Division Multiplexing (OFDM) system. Co-channel interference is measured in a frequency hopping, multiple user, OFDM system by tracking the sub-carriers assigned to all users in a particular service area or cell. The composite noise plus interference can be determined by measuring the amount of received power in a sub-carrier whenever it is not assigned to any user in the cell. A value is stored for each sub-carrier in the system and the value of noise plus interference can be a weighted average of the present value with previously stored values. The noise component can be independently determined in a synchronous system. In the synchronous system, all users in a system may periodically be prohibited from broadcasting over a sub-carrier and the received power in the sub-carrier measured during the period having no broadcasts.

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