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公开(公告)号：US08442160B2
公开(公告)日：2013-05-14
申请号：US12939118
申请日：2010-11-03
IPC分类号： H04L27/06
CPC分类号： H04L25/0232 , H04L25/022
摘要： Time filtering channel estimates in a wireless communication system, such as an Orthogonal Frequency Division Multiplex (OFDM) system, can be used to improve the quality of channel estimates. The characteristics of an optimal channel estimate time filter can depend on the manner in which the channel estimate is determined as well as the time correlation of channel estimates. A receiver can implement an adaptive time filter for channel estimates in which the time filter response can vary based on channel estimate parameters. The channel estimate parameters can include the manner of determining channel estimates, a time correlation of channel estimates, and an estimated Doppler frequency. The time filter response can be varied continuously over a range of responses or can be varied discretely over a predetermined number of time filter responses.
摘要翻译： 在诸如正交频分复用（OFDM）系统的无线通信系统中的时间滤波信道估计可以用于提高信道估计的质量。 最优信道估计时间滤波器的特征可以取决于信道估计的方式以及信道估计的时间相关性。 接收机可以实现用于信道估计的自适应时间滤波器，其中时间滤波器响应可以基于信道估计参数而变化。 信道估计参数可以包括确定信道估计的方式，信道估计的时间相关性和估计的多普勒频率。 时间滤波器响应可以在响应范围内连续变化，或者可以在预定数量的时间滤波器响应上离散变化。
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公开(公告)号：US08433016B2
公开(公告)日：2013-04-30
申请号：US12780600
申请日：2010-05-14
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
IPC分类号： H04B1/10
CPC分类号： H04L25/03044 , H04B1/1036 , H04B1/109 , H04B15/00 , H04B2215/061 , H04L2025/03477
摘要： The disclosure is directed to a receiver, and methods therefor, including an automatic gain control circuit with a first digital variable gain amplifier that outputs digital samples based on a modulated wireless signal, an interference canceller configured to filter the digital samples using a least mean squares algorithm to reduce narrowband interference, and a second DVGA configured to amplify the filtered digital samples.
摘要翻译： 本发明涉及一种接收机及其方法，包括具有基于调制无线信号输出数字样本的第一数字可变增益放大器的自动增益控制电路，被配置为使用最小均方对数字采样进行滤波的干扰消除器 算法来减少窄带干扰，第二个DVGA被配置为放大经滤波的数字样本。
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公开(公告)号：US20110051618A1
公开(公告)日：2011-03-03
申请号：US12939118
申请日：2010-11-03
CPC分类号： H04L25/0232 , H04L25/022
摘要： Time filtering channel estimates in a wireless communication system, such as an Orthogonal Frequency Division Multiplex (OFDM) system, can be used to improve the quality of channel estimates. The characteristics of an optimal channel estimate time filter can depend on the manner in which the channel estimate is determined as well as the time correlation of channel estimates. A receiver can implement an adaptive time filter for channel estimates in which the time filter response can vary based on channel estimate parameters. The channel estimate parameters can include the manner of determining channel estimates, a time correlation of channel estimates, and an estimated Doppler frequency. The time filter response can be varied continuously over a range of responses or can be varied discretely over a predetermined number of time filter responses.
摘要翻译： 在诸如正交频分复用（OFDM）系统的无线通信系统中的时间滤波信道估计可以用于提高信道估计的质量。 最优信道估计时间滤波器的特征可以取决于信道估计的方式以及信道估计的时间相关性。 接收机可以实现用于信道估计的自适应时间滤波器，其中时间滤波器响应可以基于信道估计参数而变化。 信道估计参数可以包括确定信道估计的方式，信道估计的时间相关性和估计的多普勒频率。 时间滤波器响应可以在响应范围内连续变化，或者可以在预定数量的时间滤波器响应上离散变化。
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14.发明授权Method and system for automatic gain control with intelligent selection of signal samples 失效智能选择信号样本的自动增益控制方法和系统公开(公告)号：US07873126B2
公开(公告)日：2011-01-18
申请号：US11397422
申请日：2006-04-03
IPC分类号： H04L27/08
CPC分类号： H03G3/3052
摘要： The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry. Every n samples of the broadcast signals, an energy estimate of the AGC output signal is used to calculate and update a gain control value. Instead of using all n samples occurring subsequent to a previous gain control value update, only a subset of those n samples are used. In particular the first half of the n samples may be discarded in the energy estimate calculation while only the second half of the n samples may be used.
摘要翻译： 本公开涉及包括自动增益控制（AGC）电路的移动通信设备。 广播信号的每n个样本，AGC输出信号的能量估计用于计算和更新增益控制值。 不是使用在先前的增益控制值更新之后发生的所有n个样本，而是仅使用那些n个采样的子集。 特别地，可以在能量估计计算中丢弃n个样本的前半部分，而只能使用n个样本的后半部分。
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公开(公告)号：US20100165851A1
公开(公告)日：2010-07-01
申请号：US12722308
申请日：2010-03-11
CPC分类号： H04W48/16
摘要： Systems and methodologies are described that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal. A receiver can receive a first RF channel with a FLO signal and can monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises a FLO signal, the receiver can switch between the first RF channel and the monitored RF channel to facilitate providing seamless reception of the FLO signal, which can be superframe synchronized between RF channels. FLO signal detection can be performed using one or more of a wide-area identification channel energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.
摘要翻译： 描述了便于在无线通信环境中监视RF信道以确定一个或多个信道是包括仅前向链路（FLO）信号的系统和方法。 接收机可以接收具有FLO信号的第一RF信道，并且可以监视FLO信号的其他RF信道。 在确定被监视的RF信道包括FLO信号之后，接收机可以在第一RF信道和所监视的RF信道之间切换，以便于提供FLO信号的无缝接收，FLO信号可以在RF信道之间超帧同步。 可以使用广域识别信道能量检测协议和广域开销信息符号解码错误检测协议中的一个或多个来执行FLO信号检测。
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16.发明申请公开(公告)号：US20100158168A1
公开(公告)日：2010-06-24
申请号：US12720534
申请日：2010-03-09
IPC分类号： H04L27/08
CPC分类号： H03G3/3052
摘要： The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry and operates in either a tracking mode or an acquisition mode. A received signal is sampled n times to calculate an energy estimate that is used to set the gain control values within the AGC circuitry. The value of n varies depending on whether the handset is operating in the acquisition mode or the tracking mode. Acquisition mode is typically considered to be the mode prior to coarse timing acquisition, also referred to as frame acquisition.
摘要翻译： 本公开涉及包括自动增益控制（AGC）电路并且以跟踪模式或采集模式操作的移动通信设备。 接收到的信号被采样n次以计算用于设置AGC电路内的增益控制值的能量估计。 n的值根据手机在采集模式或跟踪模式下的运行而变化。 采集模式通常被认为是粗略定时采集之前的模式，也称为帧采集。
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17.发明申请公开(公告)号：US20090080378A1
公开(公告)日：2009-03-26
申请号：US12055981
申请日：2008-03-26
IPC分类号： H04W40/02
CPC分类号： H04W72/005 , H04H20/06 , H04H20/22 , H04H20/42 , H04L5/0023 , H04L5/0037 , H04L5/0091 , H04W16/02
摘要： Methods and apparatus for RF channel switching in a multi-frequency network. In an aspect, a method includes identifying a local area operations infrastructure (LOI) in the multi-frequency network, generating a channel description message that associates at least one descrambling sequence identifier with each RF channel associated with the LOI, respectively, and distributing the CDM over the LOI. In another aspect, a method includes receiving a CDM that associates at least one descrambling sequence identifier with each RF channel available in a LOI, detecting an RF channel switch event that identifies a selected RF channel, determining a selected descrambling sequence identifier from the CDM based on the selected RF channel, switching to the selected RF channel wherein the selected descrambling sequence identifier identifies a selected descrambling sequence to descramble desired content carried on the selected RF channel, and acquiring the desired content on the selected RF channel.
摘要翻译： 多频网络中RF信道切换的方法和装置。 一方面，一种方法包括识别多频网络中的局域操作基础结构（LOI），生成分别将至少一个解扰序列标识符与与LOI相关联的每个RF信道相关联的信道描述消息，并分发 CDM超过LOI。 在另一方面，一种方法包括接收将至少一个解扰序列标识符与LOI中可用的每个RF信道相关联的CDM，检测识别所选RF信道的RF信道切换事件，从基于CDM确定所选解扰序列标识符 在所选择的RF信道上，切换到所选择的RF信道，其中所选择的解扰序列标识符识别所选择的解扰序列，以对所选择的RF信道上承载的期望内容进行解扰，以及在所选择的RF信道上获取所需的内容。
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18.发明申请公开(公告)号：US20090029705A1
公开(公告)日：2009-01-29
申请号：US12141840
申请日：2008-06-18
摘要： Methods and apparatus for service acquisition in a multi-frequency network. In an aspect, a method is provided for service acquisition in a multi-frequency network. The method includes detecting a service acquisition trigger event and identifying a selected RF channel from an acquisition RF list based on signal strength, wherein the acquisition RF list identifies RF channels in one or more local operations infrastructures (LOIs) of the multi-frequency network. The method also includes acquiring a wide system on the selected RF channel, removing the selected RF channel from the acquisition RF list if the wide system can not be acquired on the selected RF channel, and repeating said operations of identifying, acquiring and removing until the wide system is acquired on the selected RF channel or a system acquisition timeout occurs.
摘要翻译： 多频网络服务采集方法与装置。 在一方面，提供了一种用于多频网络中的服务获取的方法。 该方法包括基于信号强度检测服务获取触发事件和从获取RF列表识别所选择的RF信道，其中所述获取RF列表识别所述多频网络的一个或多个本地操作基础设施（LOI）中的RF信道。 该方法还包括在所选择的RF信道上获取宽系统，如果在所选择的RF信道上不能获取宽系统，则从获取RF列表中移除所选择的RF信道，并重复所述识别，获取和去除的操作，直到 在所选择的RF信道上获取宽系统，或发生系统采集超时。
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19.发明申请Method to track analog gain step magnitudes online during operation of wireless mobile devices 有权在无线移动设备操作期间在线跟踪模拟增益步幅的方法公开(公告)号：US20060215793A1
公开(公告)日：2006-09-28
申请号：US11373369
申请日：2006-03-10
申请人： Linbo Li , Fuyun Ling , Raghuraman Krishnamoorthi
发明人： Linbo Li , Fuyun Ling , Raghuraman Krishnamoorthi
IPC分类号： H04L27/08
CPC分类号： H03G3/3052 , H03F1/0205 , H03F3/24 , H03F2200/294 , H03F2200/372 , H03G1/0088 , H03G3/3068 , H04B1/109
摘要： Systems and methods are provided for tracking and compensating for analog gain mismatches or changes in a receiver. In an embodiment, a method is provided to track analog gain step magnitudes during operation of a device. The method includes employing an error signal between an automatic gain control (AGC) output and a reference level as input to a gain step magnitude tracking component. This also includes determining at least one compensation value from the AGC output to update a nominal gain step magnitude that tracks an actual gain step magnitude.
摘要翻译： 提供系统和方法来跟踪和补偿接收机中的模拟增益失配或变化。 在一个实施例中，提供了一种用于在设备操作期间追踪模拟增益步幅的方法。 该方法包括采用自动增益控制（AGC）输出和参考电平之间的误差信号作为增益步长跟踪分量的输入。 这还包括从AGC输出确定至少一个补偿值以更新追踪实际增益步幅的标称增益步幅。
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公开(公告)号：US10193735B2
公开(公告)日：2019-01-29
申请号：US15014800
申请日：2016-02-03
申请人： Hyukjoon Kwon , Sandeep Krishnamurthy , Linbo Li , Jungwon Lee
发明人： Hyukjoon Kwon , Sandeep Krishnamurthy , Linbo Li , Jungwon Lee
摘要： Apparatuses, systems, and methods are described for power allocation in a superposition multiple access communication system capable of using non-uniform joint constellations or super-constellations. In one method, the conditional probability of a correctly-received symbol and a normalized weighting coefficient is calculated for each receiver and then the sum of weighted efficiencies is calculated. The optimal power allocation is determined for each receiver by maximizing the sum of weighted spectral efficiencies.
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