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1. 发明申请

WO2006110455A3 ADAPTIVE TIME-FILTERING FOR CHANNEL ESTIMATION IN OFDM SYSTEM 审中-公开
标题翻译： OFDM系统中信道估计的自适应时间滤波
公开(公告)号：WO2006110455A3
公开(公告)日：2007-01-11
申请号：PCT/US2006012843
申请日：2006-04-07
申请人： QUALCOMM INC , LI LINBO , MANTRAVADI ASHOK , LING FUYUN , MUKKAVILLI KRISHNA KIRAN
发明人： LI LINBO , MANTRAVADI ASHOK , LING FUYUN , MUKKAVILLI KRISHNA KIRAN
IPC分类号： H04L25/02
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。

2. 发明申请

WO2007038723A3 RF CHANNEL SWITCHING IN BROADCAST OFDM SYSTEMS 审中-公开
标题翻译：广播OFDM系统中的RF信道切换
公开(公告)号：WO2007038723A3
公开(公告)日：2008-12-11
申请号：PCT/US2006037992
申请日：2006-09-27
申请人： QUALCOMM INC , LI LINBO , MANTRAVADI ASHOK , LING FUYUN , KRISHNAMOORTHI RAGHURAMAN
发明人： LI LINBO , MANTRAVADI ASHOK , LING FUYUN , KRISHNAMOORTHI RAGHURAMAN
IPC分类号： H04W48/16
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。

3. 发明申请

WO2008058059A3 NARROW-BAND INTERFERENCE CANCELLER 审中-公开
标题翻译：窄带干扰CANCELLER
公开(公告)号：WO2008058059A3
公开(公告)日：2008-08-07
申请号：PCT/US2007083594
申请日：2007-11-05
申请人： QUALCOMM INC , VRCELJ BOJAN , MANTRAVADI ASHOK , LING FUYUN , LI LINBO , KRISHNAMOORTHI RAGHURAMAN , CHARI MURALI RAMASWAMY , MURTHY VINAY
发明人： VRCELJ BOJAN , MANTRAVADI ASHOK , LING FUYUN , LI LINBO , KRISHNAMOORTHI RAGHURAMAN , CHARI MURALI RAMASWAMY , MURTHY VINAY
IPC分类号： H04B1/10 , H04B15/00
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. The receiver includes an interference canceller configured to filter digital samples produced from a modulated signal transmitted over a wireless channel, and a digital variable gain amplifier (DVGA) configured to amplify the filtered digital samples.
摘要翻译：本公开涉及一种接收机。接收机包括被配置为对通过无线信道传输的调制信号产生的数字样本进行滤波的干扰消除器，以及被配置成放大经滤波的数字样本的数字可变增益放大器（DVGA）。

4. 发明申请

WO2010088612A8 APPARATUS AND METHOD FOR ANTENNA SWITCHING DIVERSITY IN AN OFDM SYSTEM 审中-公开
标题翻译：在OFDM系统中天线切换多样性的装置和方法
公开(公告)号：WO2010088612A8
公开(公告)日：2011-10-13
申请号：PCT/US2010022752
申请日：2010-02-01
申请人： QUALCOMM INC , LI LINBO , MANTRAVADI ASHOK
发明人： LI LINBO , MANTRAVADI ASHOK
IPC分类号： H04B7/08
CPC分类号： H04B7/0805 , H04B7/0811
摘要： Methods, systems, and apparatus, including computer programs encoded on computer storage media, for antenna switching diversity comprising: identifying the start of an OFDM symbol period; switching from an original antenna to an alternative antenna; calculating a signal quality metric associated with the original antenna and the alternative antenna; and selecting either the original antenna or the alternative antenna for demodulation of a current OFDM symbol based on the calculated signal quality metric. In one aspect, the antenna switching diversity is based on either symbol rate switching or block rate switching, and a selection of one or the other is made.
摘要翻译：方法，系统和装置，包括在计算机存储介质上编码的用于天线切换分集的计算机程序，包括：识别OFDM符号周期的开始; 从原始天线切换到替代天线; 计算与原始天线和替代天线相关联的信号质量度量; 以及基于所计算的信号质量度量，选择原始天线或替代天线以解调当前OFDM符号。在一个方面，天线切换分集基于符号速率切换或块速率切换，并且进行一个或另一个的选择。

5. 发明申请

WO2008157818A3 METHODS AND APPARATUS FOR SERVICE ACQUISITION IN A MULTI-FREQUENCY NETWORK 审中-公开
标题翻译：多频网络中服务获取的方法和设备
公开(公告)号：WO2008157818A3
公开(公告)日：2009-02-19
申请号：PCT/US2008067788
申请日：2008-06-20
申请人： QUALCOMM INC , GUPTA BINITA , LI LINBO , KRISHNAMOORTHI RAGHURAMAN , MANTRAVADI ASHOK
发明人： GUPTA BINITA , LI LINBO , KRISHNAMOORTHI RAGHURAMAN , MANTRAVADI ASHOK
IPC分类号： H04W48/18
CPC分类号： H04W48/18 , H04W28/18
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。

6. 发明申请

WO2008116197A3 HANDOFF IN A MULTI-FREQUENCY NETWORK 审中-公开
标题翻译：多频网络中的手动切换
公开(公告)号：WO2008116197A3
公开(公告)日：2008-11-13
申请号：PCT/US2008057938
申请日：2008-03-21
申请人： QUALCOMM INC , GUPTA BINITA , LI LINBO , KRISHNAMOORTHI RAGHURAMAN , MANTRAVADI ASHOK
发明人： GUPTA BINITA , LI LINBO , KRISHNAMOORTHI RAGHURAMAN , MANTRAVADI ASHOK
IPC分类号： H04W36/04 , H04W36/08
CPC分类号： H04W36/00 , H04W36/0083
摘要： Methods and apparatus for RF handoff in a multi-frequency network. A method includes generating seamless and partially seamless handoff tables for multiplexes carried in a current LOI, wherein the seamless and partially seamless handoff tables comprise neighboring RF channels carrying one or more of the multiplexes in the current LOI, detecting a handoff event initiated by acquisition failures on a current RF, selecting a selected RF channel from the seamless and partially seamless handoff tables, and performing a handoff to the selected RF channel. An apparatus includes processing logic configured to generate the seamless and partially seamless handoff tables, detect a handoff event initiated by acquisition failures on a current RF, and select a selected RF channel from the seamless and partially seamless handoff tables. The apparatus also includes channel switch logic configured to perform a handoff to the selected RF channel.
摘要翻译：多频网络中RF切换的方法和装置。一种方法包括为当前LOI中携带的多路复用产生无缝和部分无缝切换表，其中无缝和部分无缝切换表包括在当前LOI中携带一个或多个多路复用的相邻RF信道，检测由采集失败发起的切换事件在当前RF上，从无缝和部分无缝切换表中选择所选择的RF信道，以及对所选择的RF信道执行切换。一种装置包括处理逻辑，其被配置为生成无缝和部分无缝切换表，检测由当前RF获取故障引发的切换事件，以及从无缝和部分无缝切换表中选择所选择的RF信道。该装置还包括被配置为执行到所选择的RF信道的切换的信道切换逻辑。

7. 发明申请

WO2006099530A3 AUTOMATIC GAIN CONTROL FOR A WIRELESS RECEIVER 审中-公开
标题翻译：无线接收机的自动增益控制
公开(公告)号：WO2006099530A3
公开(公告)日：2006-12-21
申请号：PCT/US2006009473
申请日：2006-03-13
申请人： QUALCOMM INC , MURTHY VINAY , KRISHNAMOORTHI RAGHURAMAN , LI LINBO
发明人： MURTHY VINAY , KRISHNAMOORTHI RAGHURAMAN , LI LINBO
IPC分类号： H03G3/30
CPC分类号： H03G7/007 , H03G3/3068 , H03G3/3078 , H03G3/3089 , H04B1/18 , H04L27/2601 , H04L27/2614 , H04L27/2647
摘要： Techniques for performing automatic gain control (AGC) at a wireless receiver are described. The total gain for the wireless receiver is achieved with discrete gain steps for analog circuitry and continuous gain for a digital variable gain amplifier (DVGA). An AGC loop is updated based on power measurements for an output signal from the DVGA. A first gain for the analog circuitry is selected from among multiple discrete gain values based on the AGC loop to maintain the average power of a baseband signal within a predetermined range at an analog-to-digital converter (ADC) input. A second gain for the DVGA is selected based on the AGC loop to maintain the average power of the output signal at a reference power level. The first gain is switched in a manner to avoid saturation of the ADC caused by the baseband signal and to provide switching hysteresis. The AGC may be performed in log domain and with multiple modes.
摘要翻译：描述了在无线接收机处执行自动增益控制（AGC）的技术。无线接收机的总增益通过模拟电路的离散增益步长和数字可变增益放大器（DVGA）的连续增益来实现。基于来自DVGA的输出信号的功率测量来更新AGC环路。基于AGC环路从多个离散增益值中选择模拟电路的第一增益，以将模拟 - 数字转换器（ADC）输入端的基带信号的平均功率维持在预定范围内。基于AGC环路选择DVGA的第二增益，以将输出信号的平均功率维持在参考功率电平。第一增益以避免由基带信号引起的ADC饱和并提供开关滞后的方式进行切换。 AGC可以在对数域和多种模式下执行。

8. 发明申请

WO2007117723A3 PHASE COMPENSATION FOR ANALOG GAIN SWITCHING IN OFDM MODULATED PHYSICAL CHANNEL 审中-公开
标题翻译：在OFDM调制的物理通道中进行模拟增益切换的相位补偿
公开(公告)号：WO2007117723A3
公开(公告)日：2008-06-05
申请号：PCT/US2007060189
申请日：2007-01-05
申请人： QUALCOMM INC , MURTHY VINAY , LI LINBO , KRISHNAMOORTHI RAGHURAMAN
发明人： MURTHY VINAY , LI LINBO , KRISHNAMOORTHI RAGHURAMAN
IPC分类号： H03G1/00 , H04B17/40
CPC分类号： H03G1/0088 , H03G3/3052 , H04L27/2657
摘要： A control of an amplifier in an automatic gain control (AGC) loop, e.g. in the RF front end circuitry of an OFDM receiver, provides phase adjustment control data to an associated automatic frequency control (AFC), to compensate for a phase jump that would otherwise be caused by switching of the AGC gain between discrete gain states. In the disclosed example, for each gain state, comparators detect a signal energy estimate crossing either a high threshold or a low threshold. Upon threshold crossing, multiplexers select compensation data corresponding to the necessary transition from the prior state to the new state determined by the comparators, based on identification of the prior state and on the particular threshold that has been crossed (high or low). The phase compensation data supplied to the AFC, for one interval corresponding to the timing of the gain switching, adjusts phase rotation implemented in the AFC.
摘要翻译：自动增益控制（AGC）回路中放大器的控制，例如。在OFDM接收机的RF前端电路中，向相关联的自动频率控制（AFC）提供相位调整控制数据，以补偿否则将由离散增益状态之间的AGC增益切换引起的相位跳变。在所公开的示例中，对于每个增益状态，比较器检测穿过高阈值或低阈值的信号能量估计。在阈值交叉时，多路复用器基于先前状态的识别和已经被交叉（高或低）的特定阈值来选择对应于从比较器确定的从先前状态到新状态的必要转换的补偿数据。提供给AFC的相位补偿数据在对应于增益切换的定时的一个间隔内调整在AFC中实现的相位旋转。

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