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公开(公告)号：US20080112381A1
公开(公告)日：2008-05-15
申请号：US11560060
申请日：2006-11-15
申请人： Byonghyo Shim , Farrokh Abrishamkar , Inyup Kang
发明人： Byonghyo Shim , Farrokh Abrishamkar , Inyup Kang
IPC分类号： H04B7/216
CPC分类号： H04B1/71072 , H04B1/71055 , H04B1/71075 , H04B1/7115 , H04B2201/70702
摘要： Techniques for recovering a desired transmission in the presence of interfering transmissions are described. For iterative detection and cancellation, multiple groups of code channels are formed for a plurality of code channels for at least one sector. Processing is performed for the multiple groups of code channels in multiple iterations. For each iteration, data detection and signal cancellation are performed for the multiple groups of code channels in multiple stages, e.g., in a sequential order starting with the strongest group to the weakest group. Each stage of each iteration may perform data detection, signal reconstruction, and signal cancellation. Each stage of each iteration may also perform equalization, data detection, signal reconstruction, and signal cancellation.
摘要翻译： 描述了在存在干扰传输的情况下恢复所需传输的技术。 对于迭代检测和消除，针对至少一个扇区的多个代码信道形成多组代码信道组。 在多个迭代中针对多组代码信道执行处理。 对于每个迭代，对于多个阶段的多组代码信道执行数据检测和信号消除，例如以从最强组到最弱组的顺序顺序执行。 每个迭代的每个阶段都可以执行数据检测，信号重建和信号消除。 每个迭代的每个阶段也可以执行均衡，数据检测，信号重建和信号消除。
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公开(公告)号：US07061882B2
公开(公告)日：2006-06-13
申请号：US10643639
申请日：2003-08-18
IPC分类号： H04B7/216
CPC分类号： H04B1/707
摘要： A system is disclosed for use in a wireless communication system to provide an estimated pilot signal. The system includes a receiver and a front-end processing and despreading component in electronic communication with the receiver for despreading a CDMA signal. A pilot estimation component is in electronic communication with the front-end processing and despreading component for estimating an original pilot signal using a pilot estimator that includes more than one filter and that includes a switching method for using the more than one filter. The switching method uses a prediction error. A demodulation component is in electronic communication with the pilot estimation component and the front-end processing and despreading component for providing demodulated data symbols.
摘要翻译： 公开了一种在无线通信系统中用于提供估计的导频信号的系统。 该系统包括接收机和与接收机进行电子通信的前端处理和解扩部件，用于解扩CDMA信号。 导频估计部件与前端处理和解扩部件进行电子通信，用于使用包括多于一个滤波器的导频估计器来估计原始导频信号，并且包括使用多于一个的滤波器的切换方法。 切换方法使用预测误差。 解调部件与导频估计部件以及用于提供解调数据符号的前端处理和解扩部件进行电子通信。
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公开(公告)号：US06744749B2
公开(公告)日：2004-06-01
申请号：US10262010
申请日：2002-09-30
IPC分类号： H04B7216
CPC分类号： H04B1/7101 , H04B2201/70701
摘要： A system is disclosed for use in a wireless communication system to provide an estimated pilot signal. The system includes a receiver and a front-end processing and despreading component in electronic communication with the receiver for despreading a CDMA signal. A pilot estimation component is in electronic communication with the front-end processing and despreading component for estimating an original pilot signal using a Wiener filter to produce a pilot estimate. A demodulation component is in electronic communication with the pilot estimation component and the front-end processing and despreading component for providing demodulated data symbols. The Wiener filter is configured by an offline filter determination process that calculates parameters of the Wiener filter to minimize the mean-square error.
摘要翻译： 公开了一种在无线通信系统中用于提供估计的导频信号的系统。 该系统包括接收机和与接收机进行电子通信的前端处理和解扩部件，用于解扩CDMA信号。 导频估计部件与前端处理和解扩部件进行电子通信，用于使用维纳滤波器估计原始导频信号以产生导频估计。 解调部件与导频估计部件以及用于提供解调数据符号的前端处理和解扩部件进行电子通信。 维纳滤波器由离线滤波器确定过程配置，该处理计算维纳滤波器的参数以最小化均方误差。
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34.发明授权公开(公告)号：US08995498B2
公开(公告)日：2015-03-31
申请号：US12906328
申请日：2010-10-18
申请人： Yingqun Yu , Farrokh Abrishamkar , Wenjun Li , Andrew K. Kan
发明人： Yingqun Yu , Farrokh Abrishamkar , Wenjun Li , Andrew K. Kan
IPC分类号： H04B1/00 , H04B1/7107 , H04B1/7105 , H04J11/00
CPC分类号： H04B1/7107 , H04B1/71052 , H04J11/0046 , H04J11/0056
摘要： An apparatus and method for a two-stage linear/nonlinear interference cancellation comprising processing a receive signal to produce a first descrambled signal; and processing the first descrambled signal to produce a detected signal. In one aspect, a first interference canceller module is used for processing the received signal and a second interference canceller module is used for processing the first descrambled signal. In one aspect, the first interference canceller is a linear interference canceller (IC) and the second interference canceller is a linear/nonlinear interference canceller (IC).
摘要翻译： 一种用于两级线性/非线性干扰消除的装置和方法，包括处理接收信号以产生第一解扰信号; 以及处理第一解扰信号以产生检测信号。 一方面，第一干扰消除器模块用于处理接收的信号，第二干扰消除器模块用于处理第一解扰信号。 一方面，第一干扰消除器是线性干扰消除器（IC），第二干扰消除器是线性/非线性干扰消除器（IC）。
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公开(公告)号：US20120281747A1
公开(公告)日：2012-11-08
申请号：US13099117
申请日：2011-05-02
申请人： Farrokh Abrishamkar , Aditya Dua
发明人： Farrokh Abrishamkar , Aditya Dua
CPC分类号： H04L25/03159
摘要： A method includes performing an operation based on transformed channel data and transformed signal data to generate a transform representation of multiple taps. The transformed channel data and the transformed signal data correspond to data received at a receiver. An inverse transform of the transform representation is determined to generate multiple taps for use at an equalizer of the receiver. At least one of the multiple taps is discarded to generate updated filter taps for the equalizer.
摘要翻译： 一种方法包括基于变换的信道数据和变换的信号数据执行操作以生成多个抽头的变换表示。 变换的频道数据和变换的信号数据对应于在接收机处接收的数据。 确定变换表示的逆变换以产生用于在接收机的均衡器处使用的多个抽头。 多个抽头中的至少一个被丢弃以生成用于均衡器的更新的滤波器抽头。
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36.发明授权Equalizer with combined CCK encoding-decoding in feedback filtering of decision feedback equalizer 有权均衡器具有组合CCK编码解码在反馈滤波中的判决反馈均衡器公开(公告)号：US07986728B2
公开(公告)日：2011-07-26
申请号：US11951742
申请日：2007-12-06
CPC分类号： H04L23/02 , H04L25/03057 , H04L2025/03375 , H04L2025/0349 , H04L2025/03611
摘要： A decision feedback equalizer includes a chip estimate buffer that forms chip estimates into a vector. A CCK decoder decodes the vector of chip estimates, and a CCK encoder, connected with the CCK decoder, re-encodes the vector of chip estimates into a valid CCK code word. At the same time, a chip slicer provides direct sliced chips from the chip estimates. An update module then forms a hybrid vector from the valid CCK code-word and the direct sliced chips for input to the feedback filter of the decision feedback equalizer. The hybrid feedback filter input vector reflects the CCK coding gain of its re-encoded portion thereby reducing the estimated chip error rate to improve the performance of the decision feedback equalizer.
摘要翻译： 判决反馈均衡器包括将码片估计形成向量的码片估计缓冲器。 CCK解码器解码芯片估计的向量，并且与CCK解码器连接的CCK编码器将芯片估计的向量重新编码为有效的CCK码字。 同时，芯片切片机从芯片估计提供直接切片芯片。 然后，更新模块从有效的CCK码字和直接切片的芯片形成混合矢量，以输入到判决反馈均衡器的反馈滤波器。 混合反馈滤波器输入矢量反映其重新编码部分的CCK编码增益，从而降低估计的芯片误码率，以提高判决反馈均衡器的性能。
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公开(公告)号：US20100278284A1
公开(公告)日：2010-11-04
申请号：US12435120
申请日：2009-05-04
CPC分类号： H04L25/03063 , H04B1/7107 , H04B2201/70703 , H04J11/0036 , H04J13/0044 , H04J13/0048 , H04J13/12 , H04L27/3488 , H04L27/38
摘要： Systems and methods for symbol detection using sub-constellations are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a processing unit configured to process received chips into received symbols for a plurality of users, a first detection unit configured to detect first components of user symbols for the plurality of users based on the received symbols and a computation unit configured to compute a portion of the received symbols due to the first components of the user symbols. The apparatus further comprises a second detection unit configured to detect second components of the user symbols based on the received symbols with the computed portion removed and a combining unit configured to detect the user symbols by combining the first components of the user symbols with the respective second components of the user symbols.
摘要翻译： 提供了使用子星座进行符号检测的系统和方法。 在本公开的一个方面，提供一种装置。 该装置包括：处理单元，被配置为将接收到的码片处理为多个用户的接收符号;第一检测单元，被配置为基于接收的符号检测多个用户的用户符号的第一分量;以及计算单元， 由于用户符号的第一分量，接收到的符号的部分。 所述装置还包括：第二检测单元，被配置为基于所接收的符号检测所述用户符号的第二成分，所述接收到的符号被删除;以及组合单元，被配置为通过将所述用户符号的第一分量与相应的第二 用户符号的组成部分。
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公开(公告)号：US20100278216A1
公开(公告)日：2010-11-04
申请号：US12435085
申请日：2009-05-04
申请人： Farrokh Abrishamkar , Yingqun Yu , Wenjun Li
发明人： Farrokh Abrishamkar , Yingqun Yu , Wenjun Li
CPC分类号： H04B1/7107
摘要： Systems and methods for inter-cell interference cancellation are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a cell computation unit configured to compute receive chips for a first interfering cell and a subtraction unit configured to remove the computed receive chips for the first interfering cell from received chips at a receiver. The apparatus further comprises a processing unit configured to process the received chips with the computed receive chips for the first interfering cell removed into received symbols and a detection unit configured to detect user symbols for a target cell from the received symbols.
摘要翻译： 提供了小区间干扰消除的系统和方法。 在本公开的一个方面，提供一种装置。 所述装置包括：单元计算单元，被配置为计算第一干扰小区的接收码片;以及减法单元，被配置为从所述接收机的接收码片中去除所计算出的所述第一干扰小区的接收码片。 所述装置还包括：处理单元，被配置为处理所接收的码片，所计算出的接收码片用于将所述第一干扰信元移除到接收符号中;以及检测单元，被配置为从所接收的符号检测目标小区的用户符号。
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公开(公告)号：US20080253487A1
公开(公告)日：2008-10-16
申请号：US11733646
申请日：2007-04-10
IPC分类号： H04L1/20
CPC分类号： H04L25/0228
摘要： Techniques for performing adaptive channel estimation are described. A receiver derives channel estimates for a wireless channel based on received pilot symbols and at least one estimation parameter. The receiver updates the at least one estimation parameter based on the received pilot symbols. The at least one estimation parameter may be for an innovations representation model of the wireless channel and may be updated based on a cost function with costs defined by prediction errors. In one design, the receiver derives predicted pilot symbols based on the received pilot symbols and the at least one estimation parameter, determines prediction errors based on the received pilot symbols and the predicted pilot symbols, and further derives error gradients based on the prediction errors. The receiver then updates the at least one estimation parameter based on the error gradients and the prediction errors, e.g., if a stability test is satisfied.
摘要翻译： 描述用于执行自适应信道估计的技术。 接收机基于接收的导频符号和至少一个估计参数导出无线信道的信道估计。 接收机基于接收的导频符号来更新至少一个估计参数。 所述至少一个估计参数可以是针对无线信道的创新表示模型，并且可以基于具有由预测误差定义的成本的成本函数来更新。 在一种设计中，接收器基于接收到的导频符号和至少一个估计参数导出预测的导频符号，基于接收到的导频符号和预测的导频符号来确定预测误差，并且还基于预测误差导出误差梯度。 然后，接收器基于误差梯度和预测误差来更新至少一个估计参数，例如，如果满足稳定性测试。
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40.发明申请公开(公告)号：US20080112382A1
公开(公告)日：2008-05-15
申请号：US11560206
申请日：2006-11-15
IPC分类号： H04B7/216
CPC分类号： H04L25/03006 , H04B1/71072 , H04L2025/03617
摘要： Techniques for recovering a desired transmission in the presence of interfering transmissions are described. For successive equalization and cancellation (SEC), equalization is performed on a received signal to obtain an equalized signal for a first set of code channels. The first set may include all code channels for one sector, a subset of all code channels for one sector, multiple code channels for multiple sectors, etc. Data detection is then performed on the equalized signal to obtain a detected signal for the first set of code channels. A signal for the first set of code channels is reconstructed based on the detected signal. The reconstructed signal for the first set of code channels is then canceled from the received signal. Equalization, data detection, reconstruction, and cancellation are performed for at least one additional set of code channels in similar manner.
摘要翻译： 描述了在存在干扰传输的情况下恢复所需传输的技术。 对于连续均衡和消除（SEC），对接收到的信号执行均衡以获得第一组码信道的均衡信号。 第一组可以包括一个扇区的所有码信道，一个扇区的所有码信道的子集，多个扇区的多个码信道等。然后，对均衡信号执行数据检测，以获得第一组的第一组的检测信号 代码渠道 基于检测到的信号重建用于第一组码信道的信号。 然后，从接收到的信号中取消用于第一组码信道的重建信号。 对于至少一个附加的代码信道集合以类似的方式执行均衡，数据检测，重建和消除。
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