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1.发明专利Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling 审中-公开无线通信中的多样性组合和日志比例缩放的噪声变化估计
公开(公告)号：JP2010252362A
公开(公告)日：2010-11-04
申请号：JP2010125972
申请日：2010-06-01
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： NAMGOONG JUNE , XU HAO , BLACK PETER J , JAYARAMAN SRIKANT
CPC classification number: H04L1/20 , H04B1/1027 , H04L27/2647
Abstract: PROBLEM TO BE SOLVED: To provide a technique for an improved demodulation process that considers thermal noise for one or more antennas mounted on a receiver, regarding noise variance estimation in wireless communications.
SOLUTION: Noise variance estimation includes: receiving a signal including an OFDM symbol having in-band tones including in-band pilot tones and band-edge tones including band-edge pilot tones and guard tones; estimating an equivalent noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones; and estimating an equivalent noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.
COPYRIGHT: (C)2011,JPO&INPITAbstract translation: 要解决的问题：提供一种考虑无线通信中的噪声方差估计的用于考虑安装在接收机上的一个或多个天线的热噪声的改进的解调过程的技术。 解决方案：噪声方差估计包括：接收包括具有带内音调的OFDM符号的信号，包括带内导频音和包括带边导频音和保护音的带边音调; 使用带内导频音和用于带内导频音的信道估计来估计带内音调的等效噪声方差; 以及使用带边导频音，带边导频音的信道估计和保护音来估计带边音调的等效噪声方差。 版权所有（C）2011，JPO＆INPIT
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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
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&INPITAbstract 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
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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
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
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公开(公告)号：JP2013243680A
公开(公告)日：2013-12-05
申请号：JP2013122368
申请日：2013-06-11
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： JAYARAMAN SRIKANT , IVAN JESUS FERNANDEZ-CORBATON , ZHENG YI SUMI
CPC classification number: H04L25/03057 , H04L25/03267 , H04L2025/0349 , H04L2025/03496 , H04L2025/03611
Abstract: PROBLEM TO BE SOLVED: To reduce error propagation in decision feedback equalization.SOLUTION: In a method and apparatus for hybrid decision feedback equalization, a correction term is used to compensate for slicer errors, and thus error propagation is avoided. Filter coefficients for an equalizer are selected so as to minimize a cost function for the equalizer, including a correction term as a function of 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.
Abstract translation: 要解决的问题：减少判决反馈均衡中的误差传播。解决方案：在混合判决反馈均衡的方法和装置中，使用校正项来补偿限幅器误差，从而避免误差传播。 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。
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公开(公告)号：JP2010154553A
公开(公告)日：2010-07-08
申请号：JP2010036368
申请日：2010-02-22
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： FERNANDEZ CORBATON IVAN JESUS , SMEE JOHN , JAYARAMAN SRIKANT
CPC classification number: H04L27/0014 , H03J7/04 , H04B1/707 , H04L2027/0028 , H04L2027/0055 , H04L2027/0067 , H04L2027/0095
Abstract: PROBLEM TO BE SOLVED: To provide multiple analog and digital downconversion. SOLUTION: In a carrier recovery method using multiple stages of carrier frequency recovery, a receiver uses multiple frequency generation sources to generate carrier signals used to downconvert a received signal. An analog frequency reference 114 having a wide frequency range and coarse frequency resolution is used in conjunction with a digital frequency reference 110 having a narrow frequency range and fine frequency resolution. The multiple carrier signals are multiplied by a received signal to effect a multi-stage downconversion, resulting in a baseband signal. A frequency tracking module 108 measures the residual frequency error present in the baseband signal. The measured residual frequency error is then used to adjust the frequencies of the carrier signals generated by the multiple frequency generation sources 114 and 110 through a processor. COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation: 要解决的问题：提供多种模拟和数字下变频。 解决方案：在使用多级载波频率恢复的载波恢复方法中，接收机使用多个频率发生源来产生用于下变频接收信号的载波信号。 结合具有窄频率范围和精细频率分辨率的数字频率参考110，使用具有宽频率范围和粗略频率分辨率的模拟频率参考114。 多载波信号乘以接收信号以进行多级下变频，产生基带信号。 频率跟踪模块108测量基带信号中存在的残余频率误差。 然后，测量的残余频率误差用于通过处理器调整由多个频率发生源114和110产生的载波信号的频率。 版权所有（C）2010，JPO＆INPIT
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Patent Agency Ranking
公开(公告)号：JP2013085259A
公开(公告)日：2013-05-09
申请号：JP2012256128
申请日：2012-11-22
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： GROB MATTHEW S , BLACK PETER J , JAYARAMAN SRIKANT , JACOBS PAUL E
IPC: H04B1/7073 , H04B1/7097 , H04J11/00 , H04L5/02 , H04L27/26 , H04W4/06 , H04W56/00
CPC classification number: H04L5/026 , H04L27/2607
Abstract: PROBLEM TO BE SOLVED: To reduce interference caused by concurrent broadcast transmissions from multiple transmitters.SOLUTION: Synchronized broadcast transmits the same broadcast content using the same waveform from multiple transmitters. The transmitters each apply the same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. An Orthogonal Frequency Divisional Multiplex (OFDM) waveform is used for the synchronized broadcast transmission. An OFDM receiver is then used to process the received synchronized broadcast transmission. A broadcast Pseudo-random Noise (PN) code is used for use by multiple transmitters. An equalizer is then used to estimate the synchronized broadcast transmission.
Abstract translation: 要解决的问题：减少来自多个发射机的并发广播传输引起的干扰。 解决方案：同步广播使用来自多个发射机的相同波形发送相同的广播内容。 发射机各自对广播传输应用相同的扩展码。 在具有时分多路复用前向链路的扩频通信系统中，将同步的广播传输插入广播时隙。 正交频分复用（OFDM）波形用于同步广播传输。 然后使用OFDM接收机来处理所接收的同步广播传输。 广播伪随机噪声（PN）码被多个发射机使用。 然后使用均衡器来估计同步的广播传输。 版权所有（C）2013，JPO＆INPIT
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公开(公告)号：JP2013081203A
公开(公告)日：2013-05-02
申请号：JP2012256127
申请日：2012-11-22
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： GROB MATTHEW S , BLACK PETER J , JAYARAMAN SRIKANT , JACOBS PAUL E
CPC classification number: H04L5/026 , H04L27/2607
Abstract: PROBLEM TO BE SOLVED: To provide a method of transmitting, by synchronized broadcast, the same broadcast content using the same waveform from multiple transmitters.SOLUTION: Transmitters each apply the same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast transmission. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
Abstract translation: 要解决的问题：提供一种通过同步广播来发送来自多个发射机的相同波形的相同广播内容的方法。 解决方案：发射机各自对广播传输应用相同的扩展码。 在具有时分多路复用前向链路的扩频通信系统中，将同步的广播传输插入广播时隙。 一个实施例采用用于同步广播传输的正交频分复用（OFDM）波形。 然后使用OFDM接收机来处理所接收的同步广播传输。 替代实施例实现广播伪随机噪声（PN）码，供多个发射机使用。 然后使用均衡器来估计同步的广播传输。 版权所有（C）2013，JPO＆INPIT
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8.发明专利Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling 有权无线通信中的多样性组合和日志比例缩放的噪声变化估计
公开(公告)号：JP2012075144A
公开(公告)日：2012-04-12
申请号：JP2011247485
申请日：2011-11-11
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： NAMGOONG JUNE , XU HAO , BLACK PETER J , JAYARAMAN SRIKANT
CPC classification number: H04L1/20 , H04B1/1027 , H04L27/2647
Abstract: PROBLEM TO BE SOLVED: To provide a method for noise variance estimation in wireless communications.SOLUTION: Noise variance estimation is made by a noise variance estimator 504 that receives a signal including an OFDM symbol having in-band tones including in-band pilot tones and band-edge tones including band-edge pilot tones and guard tones. The noise variance estimator 504 includes an in-band estimator 702 configured to compute effective noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones, and a band-edge estimator 704 configured to compute effective noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the in-band pilot tones, and the guard tones.
Abstract translation: 要解决的问题：提供无线通信中噪声方差估计的方法。 解决方案：噪声方差估计由噪声方差估计器504进行，该噪声方差估计器504接收包括具有带内音调的OFDM符号的信号，包括带内导频音和包括带边导频音和保护音的带边音调。 噪声方差估计器504包括带内估计器702，其被配置为使用带内导频音和用于带内导频音的信道估计来计算带内音调的有效噪声方差，并且配置带边估计器704 使用带边导频音，带内导频音的信道估计和保护音来计算带边音调的有效噪声方差。 版权所有（C）2012，JPO＆INPIT
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公开(公告)号：JP2012029305A
公开(公告)日：2012-02-09
申请号：JP2011180517
申请日：2011-08-22
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： JAYARAMAN SRIKANT , IVAN JESUS FERNANDEZ-CORBATON , ZHENG YI SUMI
CPC classification number: H04L25/03057 , H04L25/03267 , H04L2025/0349 , H04L2025/03496 , H04L2025/03611
Abstract: PROBLEM TO BE SOLVED: To reduce linear distortion in a received signal over a variety of operating conditions, to reduce error propagation in a decision feedback equalizer and to provide a likelihood measure to the decision feedback process.SOLUTION: In a hybrid decision feedback equalizer, a correction term is used to compensate for slicer errors, thus avoiding error propagation. Filter coefficients for the equalizer include a correction term as a function of the energy of the filter coefficients and the filter coefficients are selected so as to minimize a cost function for the equalizer. 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.
Abstract translation: 要解决的问题：为了减少在各种操作条件下的接收信号中的线性失真，以减少判决反馈均衡器中的误差传播，并为判决反馈过程提供可能性度量。 解决方案：在混合判决反馈均衡器中，使用校正项来补偿限幅器误差，从而避免错误传播。 用于均衡器的滤波器系数包括作为滤波器系数的能量的函数的校正项，并且选择滤波器系数以使均衡器的成本函数最小化。 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。 版权所有（C）2012，JPO＆INPIT
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公开(公告)号：JP2011091827A
公开(公告)日：2011-05-06
申请号：JP2010260410
申请日：2010-11-22
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： GROB MATTHEW S , BLACK PETER J , JAYARAMAN SRIKANT , JACOBS PAUL E
CPC classification number: H04L5/026 , H04L27/2607
Abstract: PROBLEM TO BE SOLVED: To allow synchronized broadcast to transmit a same broadcast content using a same waveform from multiple transmitters.
SOLUTION: Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
COPYRIGHT: (C)2011,JPO&INPITAbstract translation: 要解决的问题：允许同步广播使用来自多个发射机的相同波形来发送相同的广播内容。 解决方案：发射机各自对广播传输应用相同的扩展码。 在具有时分多路复用前向链路的扩频通信系统中，将同步的广播传输插入广播时隙。 一个实施例采用用于同步广播的正交频分复用（OFDM）波形。 然后使用OFDM接收机来处理所接收的同步广播传输。 替代实施例实现伪随机噪声（PN）码以供多个发射机使用。 然后使用均衡器来估计同步的广播传输。 版权所有（C）2011，JPO＆INPIT
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