公开(公告)号：JP2011061806A

公开(公告)日：2011-03-24

申请号：JP2010223988

申请日：2010-10-01

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

Inventor： SMEE JOHN E ,  WALTON J R ,  MALLADI DURGA P ,  WILLENEGGER SERGE

IPC: H04W36/24 ,  H04J11/00 ,  H04J13/00 ,  H04L1/22 ,  H04W36/08

CPC classification number: H04W36/30

Abstract: PROBLEM TO BE SOLVED: To provide a method for performing handoff on a forward link for a terminal, in a wireless communication system including multi-carrier modulation (MCM) for a forward link and CDMA for a reverse link.
SOLUTION: Signal quality of pilots received by a terminal from a plurality of base stations in a system is determined. A particular base station for subsequent data transmission on a forward link to the terminal is selected based on the signal quality determined for the plurality of base stations. A request to be handed off to the particular base station is initiated if the particular base station is different than a currently selected base station.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种在用于正向链路的多载波调制（MCM）和用于反向链路的CDMA的无线通信系统中在终端的前向链路上执行切换的方法。 解决方案：确定终端从系统中的多个基站接收的导频的信号质量。 基于为多个基站确定的信号质量来选择用于在到终端的前向链路上的后续数据传输的特定基站。 如果特定基站不同于当前选择的基站，则启动要切换到特定基站的请求。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011045095A

公开(公告)日：2011-03-03

申请号：JP2010204489

申请日：2010-09-13

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

Inventor： ABRISHAMKAR FARROKH ,  SMEE JOHN E ,  GLAZKO SERGUEI

IPC: H04L27/22 ,  H03K5/159 ,  H04L23/02 ,  H04L25/03 ,  H04L27/01

CPC classification number: H04L23/02 ,  H04L25/03057 ,  H04L2025/03375 ,  H04L2025/0349 ,  H04L2025/03611

Abstract: PROBLEM TO BE SOLVED: To perform complementary code keying (CCK) encoding of symbols in data supplied to a decision feedback equalizer to reduce decision errors in the decision feedback equalizer. SOLUTION: 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 a 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. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：对提供给判决反馈均衡器的数据中的符号进行补码编码（CCK）编码以减少判决反馈均衡器中的判定误差。 解决方案：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，用于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。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011055525A

公开(公告)日：2011-03-17

申请号：JP2010228496

申请日：2010-10-08

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

Inventor： JAYARAMAN SRIKANT ,  FERNANDEZ CORBATON IVAN JESUS ,  SMEE JOHN E ,  HOWARD MICHAEL A

IPC: H04B7/005 ,  H04L27/38 ,  H04B3/06 ,  H04L25/03 ,  H04L27/22

CPC classification number: H04L25/03038 ,  H04L2025/03566

Abstract: PROBLEM TO BE SOLVED: To accomplish an equalizer in which pull-in is performed at a high speed and accuracy is improved even under a fast varying environment.
SOLUTION: The present method is for optimizing an equalizer at a receiver in a communication system by training virtual parallel equalizers. Multiple configurations are applied for training an equalizer, and a performance measurement or estimate is determined. The performance measures of the multiple configurations are compared to determine the optimum configuration. The training and selection are performed at a sample rate sufficiently higher than the received sample rate as to allow optimization in between processing of data samples.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：即使在快速变化的环境下，也能够实现高速进行拉入和精度的均衡器。 解决方案：本方法用于通过训练虚拟并行均衡器在通信系统中的接收机处优化均衡器。 应用多个配置来训练均衡器，并且确定性能测量或估计。 比较多种配置的性能测量，以确定最佳配置。 训练和选择以足够高于接收到的采样率的采样率进行，以允许在数据样本的处理之间进行优化。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2009268120A

公开(公告)日：2009-11-12

申请号：JP2009132927

申请日：2009-06-02

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

Inventor： JAYARAMAN SRIKANT ,  FERNANDEZ CORBATON IVAN JESUS ,  SMEE JOHN E

IPC: H04B3/06 ,  H04L27/01 ,  H04B7/005 ,  H04L25/00 ,  H04L25/03

CPC classification number: H04L25/03057 ,  H04L25/03267 ,  H04L2025/0349 ,  H04L2025/03496 ,  H04L2025/03611

Abstract: PROBLEM TO BE SOLVED: To avoid error propagation by compensating for slicer errors while using a correction term in hybrid decision feedback equalization. SOLUTION: Filter coefficients for an equalizer are selected so as to minimize the cost function related to an equalizer, including a correction term as a function of the energy of the filter coefficients. The equalizer includes a coefficient generator that are responsive to the correction term. A transmitted symbol from a received sample as a function of Signal-to-Interference and Noise Ratio (SINR) of the received sample is estimated. 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. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：在混合判决反馈均衡中使用校正项时，通过补偿限幅器误差来避免误差传播。 选择均衡器的滤波器系数，以使与均衡器相关的成本函数最小化，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。 估计来自接收样本的发射符号作为接收样本的信号与干扰和噪声比（SINR）的函数。 将接收到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。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010193465A

公开(公告)日：2010-09-02

申请号：JP2010047776

申请日：2010-03-04

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

Inventor： JAYARAMAN SRIKANT ,  SMEE JOHN E ,  FERNANDEZ CORBATON IVAN JESUS

IPC: H04B1/707 ,  H04B7/005 ,  H04B7/02 ,  H04L25/03

CPC classification number: H04L25/03038 ,  H04B7/022 ,  H04L25/0244 ,  H04L25/0256 ,  H04L2025/03375 ,  H04L2025/03426 ,  H04L2025/03477 ,  H04L2025/03605 ,  H04W24/00 ,  H04W36/08 ,  H04W36/18

Abstract: PROBLEM TO BE SOLVED: To provide the equalization of multiple signals received by a terminal in soft handoff.
SOLUTION: A received signal at a terminal is conditioned and digitized to provide a stream of received samples (y
m ) which is then equalized and filtered 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 used to provide a corresponding stream of transmit chip estimates. The multiple streams of transmit chip estimates are further processed to provide multiple streams of data symbol estimates (d
k ), and one stream of data symbol estimates for each base station. The multiple streams of data symbol estimates are then scaled with multiple scaling factors (α
k ) and combined to provide a stream of combined data symbol estimates. Processing for the multiple base stations may be performed by a single hardware unit in a time division multiplexed manner.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了在软切换中提供由终端接收的多个信号的均衡。 解决方案：对终端处的接收信号进行调节和数字化以提供接收样本流（y m ），然后将其与多组系数进行均衡和滤波，以提供多个传输流 芯片估计（X k ）。 为每个基站提供一组系数（f k ），并用于提供相应的发射芯片估计流。 进一步处理多个传输码片估计流，以提供多个数据符号估计数据流（d k SB），以及每个基站的一个数据符号估计流。 然后用多个缩放因子（α k SB）对数据符号估计的多个流进行缩放，并组合以提供组合的数据符号估计流。 多个基站的处理可以由时分多路复用的单个硬件单元执行。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010093822A

公开(公告)日：2010-04-22

申请号：JP2009250647

申请日：2009-10-30

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

Inventor： JALALI AHMAD ,  SMEE JOHN E ,  WALLACE MARK S

IPC: H04J11/00 ,  H04B7/04 ,  H04J3/00 ,  H04J15/00 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  H04L5/22 ,  H04L25/02 ,  H04L25/03 ,  H04Q7/28

CPC classification number: H04L1/0032 ,  H04B7/0434 ,  H04B7/0626 ,  H04L1/0003 ,  H04L1/0013 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/06 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: PROBLEM TO BE SOLVED: To provide techniques to process data for transmission in a time division duplexed (TDD) communication system. SOLUTION: A frequency response of a forward link is estimated in a base station on the basis of reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function on the basis of the pilots transmitted by the terminal, "calibrates" the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols on the basis of weights derived from the forward transfer function. In another aspect, the terminal estimates the "quality" of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data is received by the terminal at the desired level of performance. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供在时分双工（TDD）通信系统中处理用于传输的数据的技术。 解决方案：基于来自终端的反向链路传输（例如，导频）在基站中估计前向链路的频率响应。 在前向链路上的数据传输之前，基站根据由终端发送的导频确定反向传递功能，用校准功能“校准”反向传递函数，以导出正向传递函数的估计， 并基于从前向传递函数导出的权重来调整前缀条件调制符号。 在另一方面，终端估计前向链路的“质量”，并将该信息提供给基站。 然后，基站使用该信息在发送之前对数据进行适当的编码和调制，使得终端以所需的性能水平接收发送的数据。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2013219778A

公开(公告)日：2013-10-24

申请号：JP2013097793

申请日：2013-05-07

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

Inventor： SMEE JOHN E ,  WALTON RODNEY J ,  MALLADI DURGA PRASAD

IPC: H04J11/00 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC classification number: 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

Abstract: PROBLEM TO BE SOLVED: To provide pilot transmission schemes suitable for use in wireless multi-carrier (e.g., OFDM) communication systems.SOLUTION: These pilot transmission schemes may utilize frequency orthogonality, time orthogonality, or both frequency and time orthogonality to achieve orthogonality among pilots transmitted by multiple base stations on a downlink. Frequency orthogonality is achieved by transmitting the pilots on disjoint sets of subbands. Time orthogonality is achieved by transmitting the pilots using multiple different orthogonal codes (e.g., Walsh codes). The pilots may also be scrambled with multiple different scrambling codes, which are used to randomize pilot interference and to enable identification of transmitters of these pilots.

Abstract translation: 要解决的问题：提供适用于无线多载波（例如，OFDM）通信系统的导频传输方案。解决方案：这些导频传输方案可以利用频率正交性，时间正交性或频率和时间正交性来实现正交性 在下行链路上由多个基站发送的导频。 通过在不相交的子带集合上发送导频来实现频率正交性。 通过使用多个不同的正交码（例如沃尔什码）发送导频来实现时间正交性。 导频还可以用多个不同的扰码进行加扰，这些扰码用于随机化导频干扰并且能够识别这些飞行员​​的发射机。

公开(公告)号：JP2011109658A

公开(公告)日：2011-06-02

申请号：JP2010254736

申请日：2010-11-15

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

Inventor： SMEE JOHN E ,  WALTON RODNEY J ,  MALLADI DURGA PRASAD

IPC: H04W72/04 ,  H04B7/06 ,  H04B7/08 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC classification number: 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

Abstract: PROBLEM TO BE SOLVED: To provide pilot transmission schemes suitable for use in wireless multi-carrier (e.g., OFDM) communication systems. SOLUTION: 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 a plurality of different orthogonal codes. The pilots may also be scrambled with a plurality of different scrambling codes, which are used to randomize pilot interference and to enable identification of transmitters of these pilots. Further, pilot interference is estimated and then subtracted from received symbols to obtain pilot-canceled symbols having improved quality. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供适用于无线多载波（例如，OFDM）通信系统的导频传输方案。 解决方案：导频传输方案可以利用频率，时间或频率和时间正交性来实现在下行链路上由多个基站发送的导频之间的正交性。 通过在不相交的子带集合上发送导频来实现频率正交性。 通过使用多个不同的正交码来发送导频来实现时间正交性。 导频还可以用多个不同的扰码进行加扰，这些扰码用于随机化导频干扰并且能够识别这些飞行员​​的发射机。 此外，估计导频干扰，然后从接收到的符号中减去，以获得具有改进质量的导频消除符号。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：DK2282438T3

公开(公告)日：2020-04-14

申请号：DK10012069

申请日：2004-01-07

Applicant: QUALCOMM INC

Inventor： SMEE JOHN E ,  WALTON JAY RODNEY ,  MALLADI DURGA PRASAD

IPC: H04L5/00 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

公开(公告)号：AT506792T

公开(公告)日：2011-05-15

申请号：AT08010035

申请日：2003-07-18

Applicant: QUALCOMM INC

Inventor： JAYARAMAN SRIKANT ,  FERNANDEZ CORBATON IVAN JESUS ,  SMEE JOHN E

IPC: H04L25/03 ,  H04L27/01 ,  H04B7/005 ,  H04L25/00

Abstract: 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.