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1. 发明申请

WO2007115329A2 PIPELINE FFT ARCHITECTURE AND METHOD 审中-公开
标题翻译：管道FFT架构和方法
公开(公告)号：WO2007115329A2
公开(公告)日：2007-10-11
申请号：PCT/US2007066002
申请日：2007-04-04
申请人： QUALCOMM INC , COUSINEAU KEVIN S , KRISHNAMOORTHI RAGHURAMAN
发明人： COUSINEAU KEVIN S , KRISHNAMOORTHI RAGHURAMAN
IPC分类号： G06F17/14
CPC分类号： G06F17/142 , H04L25/0228 , H04L27/263 , H04L27/265 , H04L27/2656
摘要： Techniques for performing Fast Fourier Transforms (FFT) are described. In some aspects, calculating the Fast Fourier Transform is achieved with an apparatus having a memory (610), a Fast Fourier Transform engine (FFTe) having one or more registers (650) and a delayless pipeline (630), the FFTe configured to receive a multi-point input from the main memory (610), store the received input in at least one of the one or more registers (650), and compute either or both of a Fast Fourier Transform (FFT) and an Inverse Fast Fourier Transform (IFFT) on the input using the delayless pipeline.
摘要翻译：描述用于执行快速傅里叶变换（FFT）的技术。在一些方面，使用具有存储器（610），具有一个或多个寄存器（650）和无延迟流水线（630）的快速傅里叶变换引擎（FFTe）的装置来实现快速傅里叶变换的计算，FFTe被配置为接收来自主存储器（610）的多点输入将所接收的输入存储在一个或多个寄存器（650）中的至少一个寄存器（650）中，并且计算快速傅里叶变换（FFT）和快速傅立叶逆变换（IFFT）使用无延迟管道输入。

2. 发明申请

WO2012027400A3 DETERMINATION OF PARITY-CHECK MATRICES SUITABLE FOR ITERATIVE DECODING OF LINEAR BLOCK CODES 审中-公开
标题翻译：确定适用于线性块编码迭代解码的奇偶校验矩阵
公开(公告)号：WO2012027400A3
公开(公告)日：2012-04-19
申请号：PCT/US2011048853
申请日：2011-08-23
申请人： QUALCOMM INC , JIANG JING , TIAN TAO , KRISHNAMOORTHI RAGHURAMAN , ZHANG XINMIAO , MANTRAVADI ASHOK , MUKKAVILLI KRISHNA K
发明人： JIANG JING , TIAN TAO , KRISHNAMOORTHI RAGHURAMAN , ZHANG XINMIAO , MANTRAVADI ASHOK , MUKKAVILLI KRISHNA K
IPC分类号： H03M13/11 , H03M13/15
CPC分类号： H03M13/1111 , H03M13/1191 , H03M13/1515 , H03M13/2966 , H03M13/616 , H04L1/005 , H04L1/0057
摘要： A method of generating a parity check matrix for iterative decoding of a linear block code includes: determining a set of parity check vectors for the linear block code; ordering according to Hamming weight non-zero parity check vectors of the set; selecting a criterion for generating the parity check matrix; and building the parity check matrix by incrementally selecting according to the criterion a parity check vector for each consecutive row of the parity check matrix, wherein the parity check vector is selected from the ordered non-zero parity check vectors remaining in the set.
摘要翻译：一种生成用于线性块码的迭代解码的奇偶校验矩阵的方法包括：确定用于线性块码的一组奇偶校验向量; 根据汉明重量非零奇偶校验向量进行排序; 选择用于生成奇偶校验矩阵的标准; 以及通过根据所述标准逐渐选择所述奇偶校验矩阵的每个连续行的奇偶校验向量来构建所述奇偶校验矩阵，其中所述奇偶校验向量是从所述组中剩余的有序非零奇偶校验向量中选择的。

3. 发明申请

WO2010039833A3 APPARATUS AND METHODS OF PROVIDING AND RECEIVING VENUE LEVEL TRANSMISSIONS AND SERVICES 审中-公开
标题翻译：提供和接收场地层面传输和服务的装置和方法
公开(公告)号：WO2010039833A3
公开(公告)日：2010-07-01
申请号：PCT/US2009059029
申请日：2009-09-30
申请人： QUALCOMM INC , KRISHNAMOORTHI RAGHURAMAN , RAHATE PANKAJ V , JAIN PANKAJ , SHAH DEVARSHI P , SELIVERSTOV PAVEL A , ROTHROCK GEORGE A , KHARE NILABH , WADHWANI ANIL K , GUO JIMING , NANDA SANJIV , LING FUYUN , CHARI MURALI R , AGRAWAL AVNEESH , BURDO RINAT , KANNAN PRASANNA , MUKKAVILLI KRISHNA K , NEWMAN REYNALDO W , FAN MICHAEL M , DESHPANDE MANOJ M , JAYARAM RANJITH S
发明人： KRISHNAMOORTHI RAGHURAMAN , RAHATE PANKAJ V , JAIN PANKAJ , SHAH DEVARSHI P , SELIVERSTOV PAVEL A , ROTHROCK GEORGE A , KHARE NILABH , WADHWANI ANIL K , GUO JIMING , NANDA SANJIV , LING FUYUN , CHARI MURALI R , AGRAWAL AVNEESH , BURDO RINAT , KANNAN PRASANNA , MUKKAVILLI KRISHNA K , NEWMAN REYNALDO W , FAN MICHAEL M , DESHPANDE MANOJ M , JAYARAM RANJITH S
IPC分类号： H04W4/06 , H04L12/18 , H04L29/06 , H04L29/08 , H04N7/173 , H04W4/02
CPC分类号： H04N21/2385 , H04L12/189 , H04L67/16 , H04L67/18 , H04N21/482 , H04W4/02 , H04W4/04 , H04W48/16 , H04W72/005
摘要： A venue-cast system and method for providing and receiving venue level transmissions and services, including discovery of a venue specific transmission by receiving an overhead signal from a non-venue network, extracting information for receiving the venue specific transmission from the overhead signal, and tuning to receive the venue specific transmission based on the extracted information. The venue level transmission may be provided and received in a manner that does not prevent an access terminal from receiving a local area or wide area transmission.
摘要翻译：一种用于提供和接收场地级传输和服务的场地播放系统和方法，包括通过从非场地网络接收开销信号来发现场地特定传输，从开销信号中提取用于接收场地特定传输的信息，以及基于所提取的信息进行调谐以接收特定于场地的传输。可以以不阻止接入终端接收局域或广域传输的方式提供和接收场地级传输。

4. 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。

5. 发明申请

WO2009059249A3 SYNCHRONIZATION IN A BROADCAST OFDM SYSTEM USING TIME DIVISION MULTIPLEXED PILOTS 审中-公开
标题翻译：使用时分多路复用器的广播OFDM系统中的同步
公开(公告)号：WO2009059249A3
公开(公告)日：2009-06-25
申请号：PCT/US2008082154
申请日：2008-10-31
申请人： QUALCOMM INC , LING FUYUN , GUPTA ALOK KUMAR , KRISHNAMOORTHI RAGHURAMAN , CHARI MURALI RAMASWAMY , VIJAYAN RAJIV , VRCELJ BOJAN
发明人： LING FUYUN , GUPTA ALOK KUMAR , KRISHNAMOORTHI RAGHURAMAN , CHARI MURALI RAMASWAMY , VIJAYAN RAJIV , VRCELJ BOJAN
IPC分类号： H04L27/26
CPC分类号： H04L27/2675 , H04L5/0007 , H04L5/0051 , H04L5/0064 , H04L7/042 , H04L25/0212 , H04L25/0216 , H04L25/0224 , H04L25/0226 , H04L27/2613 , H04L27/2656 , H04L27/2657 , H04L27/2662
摘要： In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least S1 identical pilot-1 sequences of length L1 and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2 > L1, S1 L1 = N, and S2 L2 = N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot-1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).
摘要翻译：在OFDM系统中，发射机在第一组子带上广播第一TDM导频，随后在每帧中的第二组子带上接收第二TDM导频。每个组中的子带从N个总子带中选出，使得（1）第一TDM导频的OFDM符号包含长度为L1的至少S1个相同的导频1序列，以及（2）第二TDM导频的OFDM符号包含至少S2个长度为L2的导频-2序列，其中L2> L1，S1 L1 = N，S2 L2 = N。发射机还可以广播FDM导频。接收机处理第一TDM导频以获得帧定时（例如，通过执行不同导频-1序列之间的相关）并且进一步处理第二TDM导频以获得符号定时（例如，通过检测导出的信道脉冲响应估计的开始从第二TDM导频）。

6. 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。

7. 发明申请

WO2008086204A3 METHODS AND APPARATUS FOR TIMING SYNCHRONIZATION BASED ON TRANSITIONAL PILOT SYMBOLS 审中-公开
标题翻译：基于过渡引导符号的时序同步的方法与装置
公开(公告)号：WO2008086204A3
公开(公告)日：2009-02-12
申请号：PCT/US2008050271
申请日：2008-01-04
申请人： QUALCOMM INC , VRCELJ BOJAN , MUKKAVILLI KRISHNA KIRAN , MANTRAVADI ASHOK , KRISHNAMOORTHI RAGHURAMAN
发明人： VRCELJ BOJAN , MUKKAVILLI KRISHNA KIRAN , MANTRAVADI ASHOK , KRISHNAMOORTHI RAGHURAMAN
IPC分类号： H04L25/02 , H04L27/26
CPC分类号： H04L27/2662 , H04L5/0048 , H04L7/08 , H04L25/0216 , H04L25/023 , H04L27/2613 , H04L27/2675 , H04L27/2695
摘要： Methods and apparatus for timing synchronization based on transitional pilot symbols. In an aspect, a method is provided for time tracking synchronization in an OFDM system. The method includes receiving at least one TDM pilot symbol comprising a plurality of modulated sub-carriers that are configured to provide a channel estimate having a length that extends up to a duration of an FFT used for data transmission. The method also includes determining one or both of an instantaneous and averaged channel estimates from the plurality of modulated sub-carriers, and calculating a timing offset based on one or both of the channel estimates. An apparatus includes a receiver configured to receive the at least one TDM pilot symbol, a channel estimator configured to determine the instantaneous and averaged channel estimates, and a time synchronizer configured to calculate a timing offset based on the channel estimates.
摘要翻译：基于过渡导频符号的定时同步的方法和装置。在一方面，提供了一种用于OFDM系统中的时间跟踪同步的方法。该方法包括：接收至少一个TDM导频符号，该TDM导频符号包括多个经调制的子载波，其被配置为提供具有延伸到用于数据传输的FFT的持续时间的长度的信道估计。该方法还包括确定来自多个调制子载波的瞬时和平均信道估计中的一个或两个，以及基于信道估计中的一个或两个来计算定时偏移。一种装置包括被配置为接收所述至少一个TDM导频符号的接收机，被配置为确定瞬时和平均信道估计的信道估计器，以及被配置为基于信道估计来计算定时偏移的时间同步器。

8. 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。

9. 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。

10. 发明申请

WO2006099526A3 FAST FOURIER TRANSFORM TWIDDLE MULTIPLICATION 审中-公开
标题翻译：快速傅立叶变换双向多路复用
公开(公告)号：WO2006099526A3
公开(公告)日：2008-04-10
申请号：PCT/US2006009469
申请日：2006-03-13
申请人： QUALCOMM INC , COUSINEAU KENVIN S , KRISHNAMOORTHI RAGHURAMAN
发明人： COUSINEAU KENVIN S , KRISHNAMOORTHI RAGHURAMAN
IPC分类号： G06F17/14 , H04L27/26
CPC分类号： H04L5/0064 , G06F17/142 , H04L5/0007 , H04L5/0048 , H04L5/0083 , H04L25/022 , H04L25/0226 , H04L27/265 , H04L27/2656
摘要： An FFT engine implementing a cycle count method of applying twiddle multiplications in multi-stages. When implementing a multistage FFT, the intermediate values need to be multiplied by various twiddle factors. The FFT engine utilizes a minimal number of multipliers to perform the twiddle multiplications in an efficient pipeline. Optimizing a number of complex multipliers based on an FFT radix and a number of values in each row of memory allows the FFT function to be performed using a reasonable amount of area and in a minimal number of cycles. Strategic ordering and grouping of the values allows the FFT operation to be performed in a fewer number of cycles.
摘要翻译：实现循环计数法的FFT引擎，用于多阶段应用旋转乘法。当实现多级FFT时，中间值需要乘以各种旋转因子。 FFT引擎利用最少数量的乘法器在有效的管道中执行旋转乘法。基于每一行存储器中的FFT基数和多个值来优化多个复数乘法器允许使用合理的面积和最小数量的周期来执行FFT功能。这些值的策略排序和分组允许以更少的周期执行FFT运算。

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