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1.发明授权Apparatus for receiving multiple independent RF signals simultaneously and method thereof 有权用于同时接收多个独立RF信号的装置及其方法公开(公告)号：US08320858B2
公开(公告)日：2012-11-27
申请号：US12951235
申请日：2010-11-22
IPC分类号： H04B1/04
CPC分类号： H04B1/0021 , H04B1/001
摘要： An apparatus and method for receiving and processing multiple independent, uncorrelated RF signals is presented. The apparatus includes a Hybrid-Direct Conversion Receiver incorporating front end branches, protocol-specific digital processing branches, an interference detector, a correlator, and an offset control for controlling oscillator sources. The front end branches each contain a preselector that filters received signals and a mixer that down converts the received signal to an IF offset from a reference frequency by a unique offset. The bandwidth of an IF processor is partitioned into sub-channels corresponding to the different offsets and is wider than the combination of the sub-channels. The interference detector and correlator determine whether a particular desired signal is degraded by interference signals and select a new sub-channel. This information is provided to the offset control, which adjusts a LO source coupled to the corresponding down mixer accordingly.
摘要翻译： 提出了一种用于接收和处理多个独立的，不相关的RF信号的装置和方法。 该装置包括混合直接转换接收器，其包含前端分支，协议专用数字处理分支，干扰检测器，相关器和用于控制振荡器源的偏移控制。 前端支路每个都包含用于滤波接收信号的预选器和一个将接收信号从参考频率转换为独特偏移的IF偏移的混频器。 IF处理器的带宽被划分为与不同偏移量相对应的子信道，并且比子信道的组合更宽。 干扰检测器和相关器确定特定期望信号是否被干扰信号降级并选择新的子信道。 该信息被提供给偏移控制器，该偏移控制器相应地调节耦合到相应的下混频器的LO源。
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公开(公告)号：US08259858B2
公开(公告)日：2012-09-04
申请号：US12512185
申请日：2009-07-30
IPC分类号： H04L25/06
CPC分类号： H04L25/06 , H03G3/3068 , H04L27/0014 , H04L27/38 , H04L27/3809 , H04L27/3863
摘要： A method of detecting an on-channel signal and synchronizing signal detection with correcting for DC offset errors in a direct conversion receiver is presented. A received signal is digitized, and a state machine operates to detect the presence of an on-channel signal. If the signal is not detected, a mixed mode training sequence is initiated in which the DC offset errors in both an analog and digital received signal path are corrected. While training, processing of the digitized samples by a digital signal processor and a host controller is suspended (while they are put into battery save mode) and the gain provided to subsequently received signals is minimized. The DC offset correction circuitry is bypassed and put into battery save mode at predetermined periods when DC offset correction is not performed.
摘要翻译： 提出了一种在直接转换接收机中检测通道信号和同步信号检测与校正直流偏移误差的方法。 接收到的信号被数字化，并且状态机操作以检测是否存在通道信号。 如果未检测到信号，则开始混合模式训练序列，其中校正模拟和数字接收信号路径中的DC偏移误差。 在训练时，由数字信号处理器和主机控制器处理数字化采样被暂停（当它们进入电池保存模式时），并且提供给随后接收到的信号的增益被最小化。 直流偏移校正电路被旁路，并且在不执行直流偏移校正的预定周期中进入省电模式。
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3.发明授权Method and apparatus for removing DC offset in a direct conversion receiver 有权用于去除直接转换接收机中的DC偏移的方法和装置公开(公告)号：US08027651B2
公开(公告)日：2011-09-27
申请号：US12329034
申请日：2008-12-05
IPC分类号： H04B17/02
CPC分类号： H04B1/30 , H04L25/061
摘要： A method and apparatus for correcting direct current (DC) offset errors of a received signal in a direct conversion receiver (DCR) are provided. DC offset correction algorithms are incorporated into the DCR, each algorithm being optimized for a particular receive signal operating environment. The DC offset correction algorithms remove DC offset errors in baseband In-phase and Quadrature-phase signals received within the direct conversion receiver baseband signal path. Individual DC offset correction algorithms are selected for use as determined by a signal quality estimator component. A DC offset correction component of the direct conversion receiver determines an appropriate DC offset correction algorithm suited for a particular operating environment. A criterion for a signal quality estimate is set to control transitioning between DCOC algorithms. A dual threshold strategy may be adopted to transition between one DC offset correction algorithm and another DC offset correction algorithm to provide hysteresis.
摘要翻译： 提供一种用于校正直接转换接收机（DCR）中的接收信号的直流（DC）偏移误差的方法和装置。 DC偏移校正算法被并入到DCR中，每个算法针对特定的接收信号操作环境进行优化。 DC偏移校正算法消除了在直接转换接收机基带信号路径内接收的基带同相和正交相信号中的直流失调误差。 选择单个DC偏移校正算法以由信号质量估计器组件确定使用。 直接转换接收机的DC偏移校正分量确定适合于特定操作环境的适当DC偏移校正算法。 设置信号质量估计的标准来控制DCOC算法之间的转换。 可以采用双阈值策略来在一个DC偏移校正算法和另一个DC偏移校正算法之间转换以提供滞后。
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4.发明申请METHOD AND APPARATUS FOR REMOVING DC OFFSET IN A DIRECT CONVERSION RECEIVER 有权用于在直接转换接收器中移除直流偏置的方法和装置公开(公告)号：US20100144303A1
公开(公告)日：2010-06-10
申请号：US12329034
申请日：2008-12-05
IPC分类号： H04B1/10
CPC分类号： H04B1/30 , H04L25/061
摘要： A method and apparatus for correcting direct current (DC) offset errors of a received signal in a direct conversion receiver (DCR) are provided. DC offset correction algorithms are incorporated into the DCR, each algorithm being optimized for a particular receive signal operating environment. The DC offset correction algorithms remove DC offset errors in baseband In-phase and Quadrature-phase signals received within the direct conversion receiver baseband signal path. Individual DC offset correction algorithms are selected for use as determined by a signal quality estimator component. A DC offset correction component of the direct conversion receiver determines an appropriate DC offset correction algorithm suited for a particular operating environment. A criterion for a signal quality estimate is set to control transitioning between DCOC algorithms. A dual threshold strategy may be adopted to transition between one DC offset correction algorithm and another DC offset correction algorithm to provide hysteresis.
摘要翻译： 提供一种用于校正直接转换接收机（DCR）中的接收信号的直流（DC）偏移误差的方法和装置。 DC偏移校正算法被并入到DCR中，每个算法针对特定的接收信号操作环境进行优化。 DC偏移校正算法消除了在直接转换接收机基带信号路径内接收的基带同相和正交相信号中的直流失调误差。 选择单个DC偏移校正算法以由信号质量估计器组件确定使用。 直接转换接收机的DC偏移校正分量确定适合于特定操作环境的适当DC偏移校正算法。 设置信号质量估计的标准来控制DCOC算法之间的转换。 可以采用双阈值策略来在一个DC偏移校正算法和另一个DC偏移校正算法之间转换以提供滞后。
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公开(公告)号：US08295893B2
公开(公告)日：2012-10-23
申请号：US12879053
申请日：2010-09-10
CPC分类号： H04W52/0216 , Y02D70/142 , Y02D70/164
摘要： Systems and methods for managing power consumption in a device include toggling an ON-OFF setting of apparatus, which controls a carrier detector. The toggling is carried out according to a first duty cycle having a fixed OFF-time duration and a first dwell time having a first dwell time duration during which the carrier detector performs radio frequency carrier detection function. The device receives at least one input that affects the radio frequency carrier detection function, and the first duty cycle is changed to a second duty cycle. The toggling is carried out according to the second duty cycle, which has the same fixed OFF-time duration of the first duty cycle and a second dwell time having a second dwell time duration that is longer than the first dwell time duration, during which the radio frequency carrier detection function is performed.
摘要翻译： 用于管理设备中的功率消耗的系统和方法包括切换控制载波检测器的设备的ON-OFF设置。 根据具有固定的关闭时间的第一占空比和具有载波检测器执行射频载波检测功能的第一驻留时间的第一驻留时间执行切换。 该装置接收影响射频载波检测功能的至少一个输入，并且将第一占空比改变为第二占空比。 根据第二占空比进行切换，第二占空比具有与第一占空比相同的固定的关闭时间持续时间和具有比第一停留时间长的第二停留时间的第二停留时间，在此期间， 执行射频载波检测功能。
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公开(公告)号：US08131304B2
公开(公告)日：2012-03-06
申请号：US12414642
申请日：2009-03-30
IPC分类号： H04W72/00
摘要： A method of dynamically allocating RF communication channels to a wireless communication device (102). A plurality of dynamic spectrum allocation (DSA) channels (222, 224) can be identified. The DSA channels can be channels that are available to a non-incumbent user to be used for RF communications. Based on at least one required channel parameter, a DSA channel can be selected as a first channel to allocate to the wireless communication device. At least a second channel can be selected to allocate to the wireless communication device based on a spectral relationship between the first channel and the second channel to ensure that the first and second channels are separated by at least a minimum required frequency separation (216).
摘要翻译： 一种向无线通信设备（102）动态地分配RF通信信道的方法。 可以识别多个动态频谱分配（DSA）信道（222,224）。 DSA频道可以是非现有用户可用于RF通信的频道。 基于至少一个所需的信道参数，可以选择DSA信道作为分配给无线通信设备的第一信道。 可以基于第一信道和第二信道之间的频谱关系来选择至少第二信道来分配给无线通信设备，以确保第一和第二信道至少分离最小所需频率间隔（216）。
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公开(公告)号：US08014337B2
公开(公告)日：2011-09-06
申请号：US12259228
申请日：2008-10-27
申请人： Yadunandana N. Rao , Apoorv Chaudhri , Surhir Rao
发明人： Yadunandana N. Rao , Apoorv Chaudhri , Surhir Rao
CPC分类号： H04W16/14 , H04W40/08 , H04W40/20 , H04W84/18 , Y02D70/142 , Y02D70/144 , Y02D70/22 , Y02D70/324 , Y02D70/38
摘要： A method (400) and system (100) for a wireless multi-hopping communication system is provided, wherein the system (100) includes an access point (102), a source node (CR1), and a plurality of nodes. The source node (CR1) is in communication with the access point (102), and configured to transmit a signal on at least one of a plurality of frequencies. The plurality of nodes are in communication with the access point (102) and the source node (CR1), and configured to transmit a signal on at least one of the plurality of frequencies, wherein the source node (CR1) and the plurality of nodes are adapted to determine a routing path utilizing at least one intermediate node (CR2) of the plurality of nodes and a transmitting frequency of the plurality of frequencies while reducing interference to a primary user of the transmitting frequency.
摘要翻译： 提供了一种用于无线多跳通信系统的方法（400）和系统（100），其中系统（100）包括接入点（102），源节点（CR1）和多个节点。 源节点（CR1）与接入点（102）通信，并且被配置为在多个频率中的至少一个频率上发送信号。 所述多个节点与所述接入点（102）和所述源节点（CR1）通信，并且被配置为在所述多个频率中的至少一个频率上发送信号，其中所述源节点（CR1）和所述多个节点 适于使用所述多个节点中的至少一个中间节点（CR2）和所述多个频率的发射频率来确定路由路径，同时减少对所述发射频率的主用户的干扰。
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8.发明申请公开(公告)号：US20100303026A1
公开(公告)日：2010-12-02
申请号：US12474886
申请日：2009-05-29
IPC分类号： H04W4/00
CPC分类号： H04W16/14 , H04W72/082 , H04W88/18
摘要： The application discloses a method and apparatus for dynamic spectrum allocation to a secondary communication system seeking to operate within the spectrum of a regulated primary communication system. The method includes clustering a plurality of secondary devices based on an operating frequency utilized by each of the secondary devices. The method then includes assigning sensing opportunities to the plurality of clustered secondary devices. The method then includes, receiving sensing information from each of the clustered secondary devices. The sensing information indicates at least one of an occupied channel frequency and an unoccupied channel frequency in the spectrum. The method further includes determining at least one spectrum opportunity, in the spectrum, that is unoccupied by each of a plurality of primary devices based on the received sensing information, and allocating the at least one spectrum opportunity to at least one of the secondary devices.
摘要翻译： 本申请公开了一种用于动态频谱分配给寻求在受调节的主要通信系统的频谱范围内操作的辅助通信系统的方法和装置。 该方法包括基于每个辅助设备使用的工作频率对多个辅助设备进行聚类。 该方法然后包括将感测机会分配给多个群集二次设备。 该方法然后包括从每个群集二次设备接收感测信息。 感测信息指示频谱中的占用信道频率和未占用信道频率中的至少一个。 该方法还包括基于所接收的感测信息来确定频谱中至少一个频谱机会，其中多个主设备中的每一个未占用，并且将至少一个频谱机会分配给至少一个辅助设备。
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9.发明申请公开(公告)号：US20130148761A1
公开(公告)日：2013-06-13
申请号：US13314603
申请日：2011-12-08
IPC分类号： H04L25/06
CPC分类号： H04B1/30
摘要： A communication system comprises a direct conversion receiver for correcting imbalance errors. The direct conversion receiver receives a radio frequency (RF) signal and converts the RF signal to baseband signals. The direct conversion receiver further translates the baseband signals to digital signals having a direct current (DC) offset and applies a DC offset correction to the digital signals having the DC offset to generate first DC offset corrected signals. An imbalance correction unit of the direct conversion receiver applies an imbalance correction to the first DC offset corrected signals by estimating an error between an average envelope of the first DC offset corrected signals and an average envelope of second DC offset corrected signals. The imbalance correction unit is fixed at initial imbalance parameter values. The direct conversion receiver further updates the initial imbalance parameter values of the imbalance correction unit based on the estimated error for correcting imbalance errors.
摘要翻译： 通信系统包括用于校正不平衡误差的直接转换接收器。 直接转换接收器接收射频（RF）信号并将RF信号转换为基带信号。 直接转换接收器进一步将基带信号转换为具有直流（DC）偏移的数字信号，并将DC偏移校正应用于具有DC偏移的数字信号以产生第一DC偏移校正信号。 直接变换接收器的不平衡校正单元通过估计第一DC偏移校正信号的平均包络和第二DC偏移校正信号的平均包络之间的误差来对第一DC偏移校正信号施加不平衡校正。 不平衡校正单元固定在初始不平衡参数值。 直接变换接收机进一步基于用于校正不平衡误差的估计误差来更新不平衡校正单元的初始不平衡参数值。
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10.发明授权Method for optimizing spatial diversity gain of a set of nodes used for cooperative sensing 有权用于优化用于协同感测的一组节点的空间分集增益的方法公开(公告)号：US08160004B2
公开(公告)日：2012-04-17
申请号：US12494742
申请日：2009-06-30
申请人： Yadunandana N. Rao , Apoorv Chaudhri , Surhir Rao
发明人： Yadunandana N. Rao , Apoorv Chaudhri , Surhir Rao
IPC分类号： H04W4/00 , H04W72/00 , G06F15/177 , G06F15/173 , H04B7/02
CPC分类号： H04W16/14
摘要： A group of nodes used for sensing in a cooperative sensing communication system (100) are selected from nodes (104-112) associated with a base station (102) operating in secondary communication mode. The group has a spatial diversity gain, as determined by a cooperative sensing index (306) that initially meets a minimum threshold. To optimize the spatial diversity gain, nodes not in the initial set are individually added to the set (408), and the index is recomputed (608). The additional node having the highest effect on spatial diversity is added to the group (614). To maintain group size, each of the original nodes is individually removed from the group (706) and the index is recomputed (708) with each initial node removed to determine which of the initial nodes provided the smallest spatial gain contribution, and is removed from the group (714).
摘要翻译： 在与辅助通信模式中工作的基站（102）相关联的节点（104-112）中选择用于协作感测通信系统（100）中的感测的一组节点。 该组具有由初始满足最小阈值的协作感测索引（306）确定的空间分集增益。 为了优化空间分集增益，不在初始集合中的节点被单独地添加到集合（408），并且重新计算索引（608）。 将对空间分集具有最高影响的附加节点添加到组（614）。 为了保持组大小，从组（706）中单独地移除每个原始节点，并且重新计算（708）每个初始节点的索引，以确定哪些初始节点提供最小的空间增益贡献，并从 该组（714）。
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