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1.发明授权Multi-stage turbo equalization and interference cancellation receiver for wireless systems 有权用于无线系统的多级turbo均衡和干扰消除接收机公开(公告)号：US08681835B2
公开(公告)日：2014-03-25
申请号：US13402297
申请日：2012-02-22
IPC分类号： H04B1/00
CPC分类号： H04W72/1278 , H04B1/71075 , H04B1/712 , H04W72/082
摘要： In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. The receiver performs code-averaged equalization and chip chip-level code-specific interference over-cancellation on the received signals. This can result in a unified interference cancellation processing, and can avoid cumbersome calculations of code cross correlations that is required in symbol-level interference cancellation. A symbol-level code-averaged desired signal add-back is performed to address the over-cancellation of some desired signals.
摘要翻译： 在无线网络的接收节点中，使用迭代多用户多级干扰消除接收机。 接收机对接收到的信号执行代码平均均衡和芯片级代码特定的干扰过度消除。 这可以导致统一的干扰消除处理，并且可以避免在符号级干扰消除中所需的代码互相关的繁琐计算。 执行符号级代码平均期望信号加法来解决某些期望信号的过度消除。
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2.发明授权Impairment covariance and combining weight updates during iterative turbo interference cancellation reception 有权减弱协方差，并在迭代涡轮干扰消除接收期间组合权重更新公开(公告)号：US08761323B2
公开(公告)日：2014-06-24
申请号：US13333478
申请日：2011-12-21
申请人： Yi-Pin Eric Wang , Gregory Bottomley , Jung-Fu Cheng , Stephen Grant , Ning He , Niklas Johansson , Cagatay Konuskan
发明人： Yi-Pin Eric Wang , Gregory Bottomley , Jung-Fu Cheng , Stephen Grant , Ning He , Niklas Johansson , Cagatay Konuskan
IPC分类号： H04B1/10
CPC分类号： H04W72/1278 , H04B1/71075 , H04B1/712 , H04W72/082
摘要： In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. After each stage of interference cancellation, interference characteristics change. An adaptive strategy is used in which after each stage of interference cancellation, impairment covariance is parametrically updated and combining weights of the receiver are adapted to reflect the updated impairment covariance.
摘要翻译： 在无线网络的接收节点中，使用迭代多用户多级干扰消除接收机。 在干扰消除的每个阶段之后，干扰特性发生变化。 使用自适应策略，其中在干扰消除的每个阶段之后，对损伤协方差进行参数更新，并且接收机的组合权重被适配以反映更新的损害协方差。
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公开(公告)号：US08787426B2
公开(公告)日：2014-07-22
申请号：US13333703
申请日：2011-12-21
申请人： Yi-Pin Eric Wang , Stephen Grant , Ning He , Niklas Johansson
发明人： Yi-Pin Eric Wang , Stephen Grant , Ning He , Niklas Johansson
IPC分类号： H04B1/00
CPC分类号： H04B1/7107 , H04B1/7115 , H04B2201/709727 , H04B2201/709745
摘要： In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. After each stage of interference cancellation, interference characteristics change. An adaptive finger placement strategy is used in which after each stage of interference cancellation, finger delays and combining weights of the receiver are adapted to reflect the changed interference characteristics.
摘要翻译： 在无线网络的接收节点中，使用迭代多用户多级干扰消除接收机。 在干扰消除的每个阶段之后，干扰特性发生变化。 使用自适应手指放置策略，其中在干扰消除的每个阶段之后，接收机的手指延迟和组合权重适于反映改变的干扰特性。
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4.发明申请公开(公告)号：US20130077670A1
公开(公告)日：2013-03-28
申请号：US13333478
申请日：2011-12-21
申请人： Yi-Pin Eric Wang , Cagatay Konuskan , Gregory Bottomley , Jung-Fu Cheng , Niklas Johansson , Ning He , Stephen Grant
发明人： Yi-Pin Eric Wang , Cagatay Konuskan , Gregory Bottomley , Jung-Fu Cheng , Niklas Johansson , Ning He , Stephen Grant
CPC分类号： H04W72/1278 , H04B1/71075 , H04B1/712 , H04W72/082
摘要： In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. After each stage of interference cancellation, interference characteristics change. An adaptive strategy is used in which after each stage of interference cancellation, impairment covariance is parametrically updated and combining weights of the receiver are adapted to reflect the updated impairment covariance.
摘要翻译： 在无线网络的接收节点中，使用迭代多用户多级干扰消除接收机。 在干扰消除的每个阶段之后，干扰特性发生变化。 使用自适应策略，其中在干扰消除的每个阶段之后，对损伤协方差进行参数更新，并且接收机的组合权重被适配以反映更新的损害协方差。
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公开(公告)号：US20130301686A1
公开(公告)日：2013-11-14
申请号：US13468680
申请日：2012-05-10
IPC分类号： H04B1/7105
CPC分类号： H04B1/7105 , H04B1/7097 , H04B1/71052 , H04B1/71057 , H04L25/03331
摘要： A CDMA multi-code joint demodulation solution in which impairment suppression and channel matching operations are performed prior to despreading. Embodiments include a linear front end that performs chip-level suppression of signal components that are not included in a subsequent joint demodulation process. The pre-processing stage also carries out metric preparation and provides a vector decision statistic that is processed by a joint demodulation stage to extract per-code soft values for the symbols of interest in the received signal. Both code-specific and code-averaged versions of the linear processing are disclosed, as are several front-end configurations with equivalent performance, but different complexity trade-offs. These new approaches use a block formulation, requiring a set of input chip samples as an input, and perform all operations as matrix-vector multiplications, which is an approach amenable to efficient DSP or hardware implementation.
摘要翻译： 一种CDMA解码解码方案，其中在解扩之前执行损伤抑制和信道匹配操作。 实施例包括执行不包括在随后的联合解调处理中的信号分量的芯片级抑制的线性前端。 预处理阶段还执行度量准备，并提供由联合解调级处理以提取接收信号中感兴趣符号的每码软值的向量决策统计量。 公开了线性处理的代码特定和代码平均版本，以及具有相同性能但是不同复杂性权衡的若干前端配置。 这些新方法使用块公式，需要一组输入芯片样本作为输入，并执行所有操作作为矩阵向量乘法，这是一种适合高效DSP或硬件实现的方法。
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公开(公告)号：US08787427B2
公开(公告)日：2014-07-22
申请号：US13468680
申请日：2012-05-10
IPC分类号： H04B1/00
CPC分类号： H04B1/7105 , H04B1/7097 , H04B1/71052 , H04B1/71057 , H04L25/03331
摘要： A CDMA multi-code joint demodulation solution in which impairment suppression and channel matching operations are performed prior to despreading. Embodiments include a linear front end that performs chip-level suppression of signal components that are not included in a subsequent joint demodulation process. The pre-processing stage also carries out metric preparation and provides a vector decision statistic that is processed by a joint demodulation stage to extract per-code soft values for the symbols of interest in the received signal. Both code-specific and code-averaged versions of the linear processing are disclosed, as are several front-end configurations with equivalent performance, but different complexity trade-offs. These new approaches use a block formulation, requiring a set of input chip samples as an input, and perform all operations as matrix-vector multiplications, which is an approach amenable to efficient DSP or hardware implementation.
摘要翻译： 一种CDMA解码解码方案，其中在解扩之前执行损伤抑制和信道匹配操作。 实施例包括执行不包括在随后的联合解调处理中的信号分量的芯片级抑制的线性前端。 预处理阶段还执行度量准备，并提供由联合解调级处理以提取接收信号中感兴趣符号的每码软值的向量决策统计量。 公开了线性处理的代码特定和代码平均版本，以及具有相同性能但是不同复杂性权衡的若干前端配置。 这些新方法使用块公式，需要一组输入芯片样本作为输入，并执行所有操作作为矩阵向量乘法，这是一种适合高效DSP或硬件实现的方法。
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7.发明申请公开(公告)号：US20130279559A1
公开(公告)日：2013-10-24
申请号：US13454919
申请日：2012-04-24
CPC分类号： H04L25/03012 , H04L1/005 , H04L25/03171 , H04L25/0328 , H04L27/38
摘要： In one aspect, the present invention improves Turbo equalization and/or soft interference cancellation processing in communication receivers by providing an efficient and accurate technique to compute the second moment of a received symbol, e.g., an interfering symbol, as a function of the expected bit values of only those bits in the symbol that are magnitude-controlling bits according to a defined modulation constellation. Advantageously, the expected bit values in at least one embodiment are computed using a LUT that maps bit LLRs to corresponding hyperbolic tangent function values. Further, the expected symbol value is computed as a linear function of terms comprising the expected bit values and the soft symbol variance is efficiently computed from the second moment and the expected symbol value squared. This simplified processing reduces receiver complexity, particularly in the context of modulation constellations having non-constant magnitudes, and thus saves power and/or improves design economics.
摘要翻译： 在一个方面，本发明通过提供有效和准确的技术来计算接收符号的第二时刻（例如干扰符号）来改善通信接收机中的Turbo均衡和/或软干扰消除处理，作为预期位的函数 根据定义的调制星座，只有符号中那些位是幅度控制位的值。 有利地，使用将位LLR映射到对应的双曲正切函数值的LUT来计算至少一个实施例中的预期位值。 此外，预期符号值被计算为包括预期位值的项的线性函数，并且从第二时刻有效地计算软符号方差，并且预期符号值平方。 这种简化的处理降低了接收机的复杂度，特别是在具有非恒定幅度的调制星座的上下文中，从而节省功率和/或提高了设计经济性。
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8.发明授权公开(公告)号：US08934581B2
公开(公告)日：2015-01-13
申请号：US13454919
申请日：2012-04-24
IPC分类号： H04L27/06
CPC分类号： H04L25/03012 , H04L1/005 , H04L25/03171 , H04L25/0328 , H04L27/38
摘要： In one aspect, the present invention improves Turbo equalization and/or soft interference cancellation processing in communication receivers by providing an efficient and accurate technique to compute the second moment of a received symbol, e.g., an interfering symbol, as a function of the expected bit values of only those bits in the symbol that are magnitude-controlling bits according to a defined modulation constellation. Advantageously, the expected bit values in at least one embodiment are computed using a LUT that maps bit LLRs to corresponding hyperbolic tangent function values. Further, the expected symbol value is computed as a linear function of terms comprising the expected bit values and the soft symbol variance is efficiently computed from the second moment and the expected symbol value squared. This simplified processing reduces receiver complexity, particularly in the context of modulation constellations having non-constant magnitudes, and thus saves power and/or improves design economics.
摘要翻译： 在一个方面，本发明通过提供有效和准确的技术来计算接收符号的第二时刻（例如干扰符号）来改善通信接收机中的Turbo均衡和/或软干扰消除处理，作为预期位的函数 根据定义的调制星座，只有符号中那些位是幅度控制位的值。 有利地，使用将位LLR映射到对应的双曲正切函数值的LUT来计算至少一个实施例中的预期位值。 此外，预期符号值被计算为包括预期位值的项的线性函数，并且从第二时刻有效地计算软符号方差，并且预期符号值平方。 这种简化的处理降低了接收机的复杂度，特别是在具有非恒定幅度的调制星座的上下文中，从而节省功率和/或提高了设计经济性。
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公开(公告)号：US20200177360A1
公开(公告)日：2020-06-04
申请号：US16697294
申请日：2019-11-27
摘要： A method in a node is disclosed. The method comprises receiving a signal, and obtaining a first oversampled received signal by sampling the received signal according to a symbol rate. The method further comprises estimating a first frequency offset based on the first oversampled received signal, the first frequency offset estimated using an estimation range limited to one of a bandwidth of the received signal or the symbol rate of the received signal, and obtaining a second oversampled received signal by sampling the received signal according to N times the symbol rate, wherein N is greater than 1. The method further comprises estimating a true frequency offset based on the first frequency offset estimate and the second oversampled received signal.
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公开(公告)号：US09253783B2
公开(公告)日：2016-02-02
申请号：US13403683
申请日：2012-02-23
申请人： Yi-Pin Eric Wang , Anders Wallén , Stephen Grant
发明人： Yi-Pin Eric Wang , Anders Wallén , Stephen Grant
IPC分类号： H04W72/04
CPC分类号： H04W72/0486 , H04W72/0453
摘要： The method an apparatus described herein manages uplink resources to increase spectral efficiency and system capacity. According to one embodiment of the present invention, a base station may be assigned two or more downlink carriers for downlink transmission and two or more corresponding uplink carriers. In a multi-carrier mode, the base station may transmit signals on two or more downlink carriers to the same mobile terminal, and receive signals from the mobile terminal on one of the paired uplink terminals. The uplink carriers can be operated at different interference levels and the uplink traffic can be divided between the available uplink carriers based on the type of traffic and/or data transmission parameters. The mobile terminals may also be allowed to switch between the uplink carriers to improve overall efficiency.
摘要翻译： 本文描述的装置的方法管理上行链路资源以提高频谱效率和系统容量。 根据本发明的一个实施例，可以为基站分配用于下行链路传输的两个或更多个下行链路载波和两个或更多个对应的上行链路载波。 在多载波模式中，基站可以在两个或多个下行链路载波上发送信号到同一个移动终端，并且在一个上行链路终端中的一个上接收来自移动终端的信号。 上行链路载波可以以不同的干扰级别操作，并且可以基于业务类型和/或数据传输参数在可用的上行链路载波之间划分上行链路业务。 还可以允许移动终端在上行链路载波之间切换以提高整体效率。
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