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1. 发明申请

WO2005076558A1 PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR AN OFDM SYSTEM WITH EXCESS DELAY SPREAD 审中-公开
标题翻译：具有超越延迟扩展的OFDM系统的导频传输和信道估计
公开(公告)号：WO2005076558A1
公开(公告)日：2005-08-18
申请号：PCT/US2004/040959
申请日：2004-12-07
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay, Ashok , AGRAWAL, Avneesh
发明人： GORE, Dhananjay, Ashok , AGRAWAL, Avneesh
IPC分类号： H04L27/26
CPC分类号： H04L25/0226 , H04L5/0007 , H04L5/0048 , H04L25/0202 , H04L25/0212 , H04L27/2607 , H04L27/2647
摘要： Pilot transmission and channel estimation techniques for an OFDM system with excess delay spread are described. To mitigate the deleterious effects of excess delay spread, the number of pilot subbands is greater than the cyclic prefix length. This "oversampling" may be achieved by using more pilot subbands in each symbol period or different sets of pilot subbands in different symbol periods. In one channel estimation technique, first and second groups of received pilot symbols are obtained for first and second pilot subband sets, respectively, and used to derive first and second frequency response estimates, respectively. First and second impulse response estimates are derived based on the first and second frequency response estimates, respectively, and used to derive a third impulse response estimate having more taps than the number of pilot subbands in either set.
摘要翻译：描述了具有超延迟扩展的OFDM系统的导频传输和信道估计技术。为了减轻多余的延迟扩展的有害影响，导频子带的数量大于循环前缀长度。这种“过采样”可以通过在每个符号周期中使用更多的导频子带或在不同的符号周期内使用不同的导频子带集来实现。在一个信道估计技术中，分别为第一和第二导频子带集获得第一组和第二组接收导频符号，并分别用于导出第一和第二频率响应估计。基于第一和第二频率响应估计分别导出第一和第二脉冲响应估计，并且用于导出具有比两组中的导频子带数更多的抽头的第三脉冲响应估计。

2. 发明申请

WO2006020021A1 INCREMENTAL PILOT INSERTION FOR CHANNEL AND INTERFERENCE ESTIMATION 审中-公开
标题翻译：用于通道和干扰估计的增量试点插入
公开(公告)号：WO2006020021A1
公开(公告)日：2006-02-23
申请号：PCT/US2005/025157
申请日：2005-07-15
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay, Ashok , AGRAWAL, Avneesh , KHANDEKAR, Aamod
发明人： GORE, Dhananjay, Ashok , AGRAWAL, Avneesh , KHANDEKAR, Aamod
IPC分类号： H04L27/26
CPC分类号： H04L25/0226 , H04L5/0007 , H04L5/005 , H04L5/0051 , H04L5/006
摘要： Dynamic resource allocation systems, apparatus, and methods are disclosed for selectively improving the ability of a receiver to determine a channel estimate in an Orthogonal Frequency Division Multiple Access (OFDMA) system. A wireless communication system can use a common pilot channel configuration to aid channel estimation in one or more receivers in communication with the system. A receiver in communication with the system may be unable to demodulate received data due to an inaccurate channel estimate. The receiver can communicate to a transmitter in the system a request for additional channel estimation resources. The wireless communication system can provide additional channel estimation resources by inserting dedicated pilot channels into one or more of the frequencies allocated to symbols for the receiver. If the receiver is still unable to demodulate received data, the wireless communication system can incrementally insert additional pilot channels in the symbol associated with the receiver.
摘要翻译：公开了动态资源分配系统，装置和方法，用于选择性地提高接收机在正交频分多址（OFDMA）系统中确定信道估计的能力。无线通信系统可以使用公共导频信道配置来辅助与系统通信的一个或多个接收机中的信道估计。与系统通信的接收机可能由于不准确的信道估计而无法解调所接收的数据。接收机可以向系统中的发射机通信另外的信道估计资源的请求。无线通信系统可以通过将专用导频信道插入分配给接收机的符号的一个或多个频率来提供额外的信道估计资源。如果接收机仍然不能解调所接收的数据，则无线通信系统可以递增地在与接收机相关联的符号中插入附加的导频信道。

3. 发明申请

WO2005094023A1 PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR MISO AND MIMO SYSTEM 审中-公开
标题翻译： MISO和MIMO系统的PILOT传输和信道估计
公开(公告)号：WO2005094023A1
公开(公告)日：2005-10-06
申请号：PCT/US2005/006906
申请日：2005-03-02
申请人： QUALCOMM INCORPORATED , KADOUS, Tamer , AGRAWAL, Avneesh , GORE, Dhananjay, Ashok
发明人： KADOUS, Tamer , AGRAWAL, Avneesh , GORE, Dhananjay, Ashok
IPC分类号： H04L25/02
CPC分类号： H04L25/0226 , H04B7/0684
摘要： A transmitter generates multiple composite pilots with a training matrix and a gain matrix. Each composite pilot includes multiple training pilots generated with multiple columns of the training matrix and scaled with multiple gain elements in a column of the gain matrix. The transmitter transmits each composite pilot via multiple transmit antennas. A MISO receiver obtains received symbols for the multiple composite pilots and derives an estimate of a composite MISO channel. For OFDM, the MISO receiver derives an initial impulse response estimate for each composite pilot, filters the initial impulse response estimates for all composite pilots, and derives a frequency response estimate for the composite MISO channel. A MIMO receiver obtains and processes received symbols for the multiple composite pilots based on the training and gain matrices and derives channel estimates for individual SISO channels between the multiple transmit antennas and multiple receive antennas.
摘要翻译：发射机生成具有训练矩阵和增益矩阵的多个复合导频。每个复合导频包括由训练矩阵的多列生成的多个训练导频，并且在增益矩阵的列中用多个增益元素进行了缩放。发射机经由多个发射天线发送每个复合导频。 MISO接收器获得用于多个复合导频的接收符号，并导出复合MISO信道的估计。对于OFDM，MISO接收机为每个复合导频导出初始脉冲响应估计，对所有复合导频进行初始脉冲响应估计，并得出复合MISO信道的频率响应估计。 MIMO接收机基于训练和增益矩阵获得并处理多个复合导频的接收符号，并导出多个发射天线与多个接收天线之间的各个SISO信道的信道估计。

4. 发明申请

WO2005057870A1 MULTI-ANTENNA SYSTEM TO SIMULTANEOUS SUPPORT OF MISO AND MIMO RECEIVERS 审中-公开
标题翻译：多天线系统同时支持MISO和MIMO接收机
公开(公告)号：WO2005057870A1
公开(公告)日：2005-06-23
申请号：PCT/US2004/040429
申请日：2004-12-03
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay, Ashok , AGRAWAL, Avneesh , KADOUS, Tamer
发明人： GORE, Dhananjay, Ashok , AGRAWAL, Avneesh , KADOUS, Tamer
IPC分类号： H04L25/02
CPC分类号： H04L25/0226 , H04B7/0452 , H04B7/0684 , H04L27/2613
摘要： Efficient pilot transmission schemes for multi-antenna communication systems are described. In general, MISO receivers prefer a pilot transmitted in one spatial direction, and MIMO receivers typically require a pilot transmitted in different spatial directions. 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.
摘要翻译：描述了用于多天线通信系统的有效导频传输方案。通常，MISO接收机优选在一个空间方向上发送的导频，并且MIMO接收机通常需要在不同空间方向上发送的导频。在一个导频传输方案中，利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接收机将由系统，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。

5. 发明申请

WO2011119767A1 REPEATER-ASSISTED MANAGEMENT OF MACRO NETWORK COVERAGE 审中-公开
标题翻译：重新协调宏网络覆盖管理
公开(公告)号：WO2011119767A1
公开(公告)日：2011-09-29
申请号：PCT/US2011/029674
申请日：2011-03-23
申请人： QUALCOMM INCORPORATED , ESTEVES, Eduardo, S. , GORE, Dhananjay, Ashok , MAKHIJANI, Mahesh, A.
发明人： ESTEVES, Eduardo, S. , GORE, Dhananjay, Ashok , MAKHIJANI, Mahesh, A.
IPC分类号： H04W16/26 , H04B7/26 , H04W24/02 , H04W84/04
CPC分类号： H04B7/15528 , H04B7/15507 , H04B7/15535 , H04B7/1555 , H04B7/15578 , H04B7/2606 , H04W16/00 , H04W16/26 , H04W24/02 , H04W84/047
摘要： A method of managing macro network coverage among a plurality of repeaters deployed to extend coverage of one or more base stations may include receiving feedback information from at least two repeaters indicative of macro network coverage at locations corresponding to each repeater, determining a coverage status of the macro network based on the feedback information, and sending a control signal to at least one repeater instructing the repeater to adjust one or more operating parameters based on the determined coverage status.
摘要翻译：在部署以扩展一个或多个基站的覆盖范围的多个中继器之间管理宏网络覆盖的方法可包括从至少两个中继器接收指示在与每个中继器相对应的位置处的宏网络覆盖的反馈信息，确定基于所述反馈信息的宏网络，以及基于所确定的覆盖状态，向至少一个中继器发送控制信号，指示所述中继器调整一个或多个操作参数。

6. 发明申请

WO2011088240A1 USE OF RF REFERENCE IN A DIGITAL BASEBAND INTERFERENCE CANCELLATION REPEATER 审中-公开
标题翻译：在数字基带干扰消除重复器中使用RF参考
公开(公告)号：WO2011088240A1
公开(公告)日：2011-07-21
申请号：PCT/US2011/021183
申请日：2011-01-13
申请人： QUALCOMM INCORPORATED , PROCTOR, James, A., Jr. , GAINEY, Kenneth, M. , GORE, Dhananjay, Ashok , BARRIAC, Gwendolyn Denise
发明人： PROCTOR, James, A., Jr. , GAINEY, Kenneth, M. , GORE, Dhananjay, Ashok , BARRIAC, Gwendolyn Denise
IPC分类号： H04B7/155
CPC分类号： H04B7/15585 , H04B1/525
摘要： A wireless repeater includes an echo canceller to cancel an estimated feedback amount from an input signal and a reference receiver to sample a portion of the transmit signal prior to over-the-air transmission for use as the reference signal for channel estimation. More accurate channel estimation is obtained by using the reference signal from the reference receiver as the reference signal accounts for distortions in the transmitter circuit of the repeater.
摘要翻译：无线中继器包括回波消除器，以从输入信号和参考接收器取消估计的反馈量，以在空中传输之前对发射信号的一部分进行采样，以用作信道估计的参考信号。通过使用来自参考接收机的参考信号获得更精确的信道估计，因为参考信号考虑了中继器的发射机电路中的失真。

7. 发明申请

WO2007051190A1 PILOT SIGNAL TRANSMISSION FOR AN ORTHOGONAL FREQUENCY DIVISION WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：正交频分区无线通信系统的试点信号传输
公开(公告)号：WO2007051190A1
公开(公告)日：2007-05-03
申请号：PCT/US2006/060336
申请日：2006-10-27
申请人： QUALCOMM INCORPORATED , GOROKHOV, Alexei , NAGUIB, Ayman, Fawzy , SUTIVONG, Arak , GORE, Dhananjay, Ashok , JI, Tingfang
发明人： GOROKHOV, Alexei , NAGUIB, Ayman, Fawzy , SUTIVONG, Arak , GORE, Dhananjay, Ashok , JI, Tingfang
IPC分类号： H04L27/26 , H04L1/00
CPC分类号： H04L27/2613 , H04B1/715 , H04B7/0413 , H04B7/12 , H04B2001/7154 , H04L1/0026 , H04L5/0023 , H04L5/0051 , H04L5/0058 , H04L25/0204 , H04L25/0216 , H04L25/0222 , H04L25/0226 , H04L25/0228 , H04L25/03866 , H04L27/261 , H04W16/28 , H04W72/1205
摘要： A plurality of transmission patterns for pilot systems transmitted from a mobile station or base station are provided. Depending upon the frequency selectivity and/or the time selectivity of the channel between the mobile station and the base station, an appropriate pattern is selected. The selected pattern allows for improved receipt of the pilot symbols. In addition, scrambling codes can be applied to the patterns for reducing interference and/or biasing the different mobile stations over the same frequencies and in the same slots.
摘要翻译：提供了从移动台或基站发送的用于导频系统的多个传输模式。根据移动站和基站之间的信道的频率选择性和/或时间选择性，选择适当的模式。所选择的模式允许改进对导频符号的接收。此外，可以将扰码应用于用于在相同频率上和相同时隙中减少干扰和/或偏置不同移动站的模式。

8. 发明申请

WO2006099348A1 SYSTEMS AND METHODS FOR BEAMFORMING IN MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEMS 审中-公开
标题翻译：用于多输入多输出通信系统中的波束形成的系统和方法
公开(公告)号：WO2006099348A1
公开(公告)日：2006-09-21
申请号：PCT/US2006/008986
申请日：2006-03-09
申请人： QUALCOMM INCORPORATED , SAMPATH, Hemanth , KADOUS, Tamer , GOROKHOV, Alexei , GORE, Dhananjay, Ashok
发明人： SAMPATH, Hemanth , KADOUS, Tamer , GOROKHOV, Alexei , GORE, Dhananjay, Ashok
IPC分类号： H04B7/06 , H04L27/26
CPC分类号： H04B7/0417 , H04B7/0617 , H04B7/063 , H04B7/0632 , H04L5/023 , H04L25/0224 , H04L27/261
摘要： Methods and apparatuses are disclosed that utilize information from less than all transmission paths from a transmitter to form beamforming weights for transmission. In addition, methods and apparatuses are disclosed that utilize channel information, such as CQI, eigenbeam weights, and/or channel estimates, to form beamforming weights.
摘要翻译：公开了利用来自发射机的小于所有传输路径的信息以形成用于传输的波束成形权重的方法和装置。此外，公开了利用诸如CQI，本征光束权重和/或信道估计之类的信道信息来形成波束成形权重的方法和装置。

9. 发明申请

WO2012018743A3 METHOD AND APPARATUS FOR ENABLING SIGNAL PROCESSING IN A MULTIPLE ANTENNA REPEATER 审中-公开
公开(公告)号：WO2012018743A3
公开(公告)日：2012-02-09
申请号：PCT/US2011/046158
申请日：2011-08-01
申请人： QUALCOMM INCORPORATED , PALANKI, Ravi , GORE, Dhananjay, Ashok , BHATTAD, Kapil , LIN, Dexu
发明人： PALANKI, Ravi , GORE, Dhananjay, Ashok , BHATTAD, Kapil , LIN, Dexu
IPC分类号： H04B7/155
摘要： Systems and methodologies are described that enable serving cell selection in a wireless network with a multiple antenna repeater operable to support MIMO communications. In one example, a repeater using orthogonal frequency division multiplexing on the downlink can be equipped to receive, by one or more receive antennas, one or more signals using one or more radio frequency (RF) isolation schemes. The repeater can further be equipped to amplify and delay the one or more signals using one or more combination schemes. Moreover, the repeater can be equipped to transmit, by one or more transmit antennas, the amplified and delayed one or more signals, wherein at least one of the one or more receive antennas or the one or more transmit antennas includes two or more antennas.

10. 发明申请

WO2010132483A3 FREQUENCY DOMAIN CHANNEL ESTIMATION FOR WIRELESS REPEATERS 审中-公开
公开(公告)号：WO2010132483A3
公开(公告)日：2010-11-18
申请号：PCT/US2010/034424
申请日：2010-05-11
申请人： QUALCOMM INCORPORATED , BARRIAC, Gwendolyn, Denise , PROCTOR, James, Arthur , GORE, Dhananjay, Ashok , WANG, Michael, Mao , TIAN, Tao
发明人： BARRIAC, Gwendolyn, Denise , PROCTOR, James, Arthur , GORE, Dhananjay, Ashok , WANG, Michael, Mao , TIAN, Tao
IPC分类号： H04L25/02
摘要： A method for estimating a feedback channel for a wireless repeater uses frequency domain channel estimation on samples of a pilot signal and samples of a receive signal. The pilot signal samples may be delayed to align the largest channel tap to a given reference time. A time domain feedback channel is generated by retaining both the causal taps and the non-causal taps of the channel estimate.

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