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1. 发明公开

EP2282438A3 Pilot transmission schemes for wireless multi-carrier communication systems 有权
公开(公告)号：EP2282438A3
公开(公告)日：2012-04-25
申请号：EP10012069.0
申请日：2004-01-07
申请人： QUALCOMM Incorporated
发明人： Smee, John E. , Walton, Jay Rodney , Malladi, Durga Prasad
IPC分类号： H04L5/00
CPC分类号： H04L5/0039 , H04B7/0669 , H04B7/0854 , H04L1/0017 , H04L1/0071 , H04L1/0618 , H04L5/0023 , H04L5/0048 , H04L25/0226 , H04L25/03343 , H04L25/03866 , H04L27/2602 , H04L27/261
摘要： Pilot transmission schemes suitable for use in wireless multi-carrier (e.g., OFDM) communication systems. These pilot transmission schemes may utilize frequency, time, or both frequency and time orthogonality to achieve orthogonality among the pilots transmitted by multiple base stations on the downlink. Frequency orthogonality is achieved by transmitting pilots on disjoint sets of subbands. Time orthogonality is achieved by transmitting pilots using different orthogonal codes (e.g., Walsh codes). The pilots may also be scrambled with different scrambling codes, which are used to randomize pilot interference and to enable identification of the transmitters of these pilots. Pilot interference cancellation may be performed to improve performance since subbands used for data transmission by one transmitter may also be used for pilot transmission by another transmitter. Pilot interference is estimated and then subtracted from received symbols to obtain pilot-canceled symbols having improved quality.

2. 发明公开

EP2254293A3 Method and apparatus for decision feedback equalization 审中-公开
标题翻译：对于判决反馈Entzerrerung的方法和装置
公开(公告)号：EP2254293A3
公开(公告)日：2010-12-08
申请号：EP10175819.1
申请日：2003-07-18
申请人： Qualcomm Incorporated
发明人： Jayaraman, Srikant , Fernandez-Corbaton, Ivan Jesus , Smee, John E.
IPC分类号： H04L25/03
CPC分类号： H04L25/03057 , H04L25/03267 , H04L2025/0349 , H04L2025/03496 , H04L2025/03611
摘要： A method and apparatus for a decision feedback equalizer wherein a correction term is used to compensate for slicer errors, thus avoiding error propagation. Filter coefficients for the equalizer are selected so as to minimize a cost function for the equalizer, including a correction term as a function of the energy of the filter coefficients. The equalizer includes a coefficient generator responsive to the correction term. One embodiment estimates a transmitted symbol from a received sample as a function of Signal-to-Interference and Noise Ratio (SINR) of the received sample. The received sample is quantized and mapped to a region of a grid overlaid on the transmitted symbol constellation. The region may correspond to a symbol estimate value or may be processed further to obtain a symbol estimate value.

3. 发明授权

EP2282436B1 Pilot transmission schemes for wireless multi-carrier communication systems 无效
公开(公告)号：EP2282436B1
公开(公告)日：2020-03-04
申请号：EP10012070.8
申请日：2004-01-07
申请人： QUALCOMM Incorporated
发明人： Smee, John E. , Walton, Jay Rodney , Malladi, Durga Prasad
IPC分类号： H04L5/00 , H04L27/26

4. 发明公开

EP2254295A1 Method and apparatus for decision feedback equalization 有权
标题翻译： Verfahren zurEntscheidungsrückgekoppeltenEntzerrerung
公开(公告)号：EP2254295A1
公开(公告)日：2010-11-24
申请号：EP10175826.6
申请日：2003-07-18
申请人： Qualcomm Incorporated
发明人： Jayaraman, Srikant , Fernandez-Corbaton, Ivan Jesus , Smee, John E.
IPC分类号： H04L25/03
CPC分类号： H04L25/03057 , H04L25/03267 , H04L2025/0349 , H04L2025/03496 , H04L2025/03611
摘要： A method and apparatus for a decision feedback equalizer wherein a correction term is used to compensate for slicer errors, thus avoiding error propagation. Filter coefficients for the equalizer are selected so as to minimize a cost function for the equalizer, including a correction term as a function of the energy of the filter coefficients. The equalizer includes a coefficient generator responsive to the correction term. One embodiment estimates a transmitted symbol from a received sample as a function of Signal-to-Interference and Noise Ratio (SINR) of the received sample. The received sample is quantized and mapped to a region of a grid overlaid on the transmitted symbol constellation. The region may correspond to a symbol estimate value or may be processed further to obtain a symbol estimate value.
摘要翻译：一种用于判决反馈均衡器的方法和装置，其中使用校正项来补偿限幅器误差，从而避免错误传播。选择用于均衡器的滤波器系数，以使均衡器的成本函数最小化，包括作为滤波器系数的能量的函数的校正项。均衡器包括响应于校正项的系数发生器。一个实施例根据接收到的采样的信号与干扰和噪声比（SINR）估计来自接收样本的发送符号。将接收的样本量化并映射到覆盖在发射符号星座上的网格的区域。该区域可以对应于符号估计值，或者可以进一步处理以获得符号估计值。

5. 发明公开

EP2254294A2 Method and apparatus for decision feedback equalization 审中-公开
标题翻译：判决反馈均衡的方法和装置
公开(公告)号：EP2254294A2
公开(公告)日：2010-11-24
申请号：EP10175823.3
申请日：2003-07-18
申请人： Qualcomm Incorporated
发明人： Jayaraman, Srikant , Fernandez-Corbaton, Ivan Jesus , Smee, John E.
IPC分类号： H04L25/03
CPC分类号： H04L25/03057 , H04L25/03267 , H04L2025/0349 , H04L2025/03496 , H04L2025/03611
摘要： A method and apparatus for a decision feedback equalizer wherein a correction term is used to compensate for slicer errors, thus avoiding error propagation. Filter coefficients for the equalizer are selected so as to minimize a cost function for the equalizer, including a correction term as a function of the energy of the filter coefficients. The equalizer includes a coefficient generator responsive to the correction term. One embodiment estimates a transmitted symbol from a received sample as a function of Signal-to-Interference and Noise Ratio (SINR) of the received sample. The received sample is quantized and mapped to a region of a grid overlaid on the transmitted symbol constellation. The region may correspond to a symbol estimate value or may be processed further to obtain a symbol estimate value.
摘要翻译：一种判决反馈均衡器的方法和装置，其中使用校正项来补偿限幅器误差，从而避免误差传播。均衡器的滤波器系数被选择为使得均衡器的成本函数最小化，包括作为滤波器系数的能量的函数的校正项。均衡器包括响应于校正项的系数发生器。一个实施例根据所接收采样的信号与干扰和噪声比（SINR）来估计来自接收采样的发送符号。量化所接收的采样并将其映射到覆盖在发送的符号星座上的网格的区域。该区域可以对应于符号估计值或可以被进一步处理以获得符号估计值。

6. 发明授权

EP2254295B1 Method for decision feedback equalization 有权
标题翻译：一种判决反馈Entzerrerung方法
公开(公告)号：EP2254295B1
公开(公告)日：2011-10-05
申请号：EP10175826.6
申请日：2003-07-18
申请人： Qualcomm Incorporated
发明人： Jayaraman, Srikant , Fernandez-Corbaton, Ivan Jesus , Smee, John E.
IPC分类号： H04L25/03
CPC分类号： H04L25/03057 , H04L25/03267 , H04L2025/0349 , H04L2025/03496 , H04L2025/03611

7. 发明公开

EP2148450A3 Equalization of multiple signals received for soft handoff in wireless communication systems 审中-公开
标题翻译：在无线通信系统中的多个信号接收软越区切换的均衡
公开(公告)号：EP2148450A3
公开(公告)日：2011-08-03
申请号：EP09150885.3
申请日：2004-02-23
申请人： QUALCOMM Incorporated
发明人： Jayaraman, Srikant , Smee, John E. , Fernandez-Corbaton, Ivan, Jesus
IPC分类号： H04B7/02 , H04B7/005
CPC分类号： H04L25/03038 , H04B7/022 , H04L25/0244 , H04L25/0256 , H04L2025/03375 , H04L2025/03426 , H04L2025/03477 , H04L2025/03605 , H04W24/00 , H04W36/08 , H04W36/18
摘要： Techniques for performing equalization of multiple signals received by a terminal in soft handoff with multiple base stations. The received signal at the terminal is conditioned and digitized to provide a stream of received samples (y m ), which is then equalized/filtered (410) with multiple sets of coefficients to provide multiple streams of transmit chip estimates (X k ). One set of coefficients (f k ) is provided for each base station and is used to provide a corresponding stream of transmit chip estimates. The multiple streams of transmit chip estimates are further processed (420) to provide multiple streams of data symbol estimates (d k ), one stream of data symbol estimates for each base station. The multiple streams of data symbol estimates are then scaled (430) with multiple scaling factors (α k ) and combined (432) to provide a stream of combined data symbol estimates (d k ). The processing for the multiple base stations may be performed by a single hardware unit in a time division multiplexed manner.

8. 发明公开

EP1956783A1 Method and apparatus for hybrid decision feedback equalization 有权
标题翻译： Verfahren und Vorrichtung zur Verwendung bei einerEntscheidungsrückgekoppeltenEntzerrung
公开(公告)号：EP1956783A1
公开(公告)日：2008-08-13
申请号：EP08010035.7
申请日：2003-07-18
申请人： Qualcomm Incorporated
发明人： Jayaraman, Srikant , Fernandez Corbation, Ivan Jesus , Smee, John E.
IPC分类号： H04L25/03
CPC分类号： H04L25/03057 , H04L25/03267 , H04L2025/0349 , H04L2025/03496 , H04L2025/03611
摘要： A method and apparatus for estimating a transmitted symbol from a received sample as a function of Signal-to-Interference and Noise Ration (SINR) of the received sample. The received sample is quantized and mapped to a region of a grid overlaid on the transmitted symbol constellation. The region may correspond to a symbol estimate value or may be processed further to obtain a symbol estimate value. The regions in one embodiment are rectangular. The symbol estimate values may be stored in a memory storage unit.
摘要翻译：一种用于从接收的样本估计发射符号作为接收样本的信号与干扰和噪声比（SINR）的函数的方法和装置。将接收的样本量化并映射到覆盖在发射符号星座上的网格的区域。该区域可以对应于符号估计值，或者可以进一步处理以获得符号估计值。一个实施例中的区域是矩形的。符号估计值可以存储在存储器存储单元中。

9. 发明授权

EP2282438B1 Pilot transmission schemes for wireless multi-carrier communication systems 有权
公开(公告)号：EP2282438B1
公开(公告)日：2020-03-11
申请号：EP10012069.0
申请日：2004-01-07
申请人： QUALCOMM Incorporated
发明人： Smee, John E. , Walton, Jay Rodney , Malladi, Durga Prasad
IPC分类号： H04L5/00

10. 发明公开

EP2254294A3 Method and apparatus for decision feedback equalization 审中-公开
公开(公告)号：EP2254294A3
公开(公告)日：2010-12-08
申请号：EP10175823.3
申请日：2003-07-18
申请人： Qualcomm Incorporated
发明人： Jayaraman, Srikant , Fernandez-Corbaton, Ivan Jesus , Smee, John E.
IPC分类号： H04L25/03
CPC分类号： H04L25/03057 , H04L25/03267 , H04L2025/0349 , H04L2025/03496 , H04L2025/03611
摘要： A method and apparatus for a decision feedback equalizer wherein a correction term is used to compensate for slicer errors, thus avoiding error propagation. Filter coefficients for the equalizer are selected so as to minimize a cost function for the equalizer, including a correction term as a function of the energy of the filter coefficients. The equalizer includes a coefficient generator responsive to the correction term. One embodiment estimates a transmitted symbol from a received sample as a function of Signal-to-Interference and Noise Ratio (SINR) of the received sample. The received sample is quantized and mapped to a region of a grid overlaid on the transmitted symbol constellation. The region may correspond to a symbol estimate value or may be processed further to obtain a symbol estimate value.

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