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1. 发明申请

WO2007114963A3 METHODS AND APPARATUS FOR NOISE ESTIMATION IN A COMMUNICATION SYSTEM 审中-公开
标题翻译：通信系统中噪声估计的方法和装置
公开(公告)号：WO2007114963A3
公开(公告)日：2008-01-03
申请号：PCT/US2007060062
申请日：2007-01-03
申请人： QUALCOMM INC , LING FUYUN , MUKKAVILLI KRISHNA KIRAN , WALKER KENT G
发明人： LING FUYUN , MUKKAVILLI KRISHNA KIRAN , WALKER KENT G
IPC分类号： H04L1/20 , H04L27/26
CPC分类号： H04L1/20 , H04L27/2602 , H04L27/2647
摘要： Methods and apparatus for noise estimation in a communication system. In an aspect, a method for noise and interference estimation is provided. The method includes identifying one or more unmodulated subcarriers in a received waveform, processing the one or more unmodulated subcarriers to produce a demodulated output, and determining a noise variance based on the demodulated output. In another aspect, an apparatus for providing a noise and interference estimation is provided. The apparatus includes selection logic configured to identify one or more unmodulated subcarriers in a received waveform, a processor configured to demodulate the one or more unmodulated subcarriers to produce a demodulated output, and variance determination logic configured to determine a noise variance based on the demodulated output.
摘要翻译：通信系统中噪声估计的方法和装置。在一方面，提供了一种用于噪声和干扰估计的方法。该方法包括识别接收波形中的一个或多个未调制副载波，处理一个或多个未调制副载波以产生解调输出，以及基于解调输出确定噪声方差。另一方面，提供了一种用于提供噪声和干扰估计的装置。所述设备包括被配置为识别接收波形中的一个或多个未调制子载波的选择逻辑，被配置为对所述一个或多个未调制子载波进行解调以产生解调输出的处理器，以及配置为基于解调输出来确定噪声方差的方差确定逻辑。

2. 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。

3. 发明申请

WO2007120940A3 METHODS AND APPARATUS FOR DETERMINING THE LOCATION OF A MOBILE DEVICE IN AN OFDM WIRELESS NETWORK 审中-公开
标题翻译：用于确定OFDM无线网络中移动设备的位置的方法和装置
公开(公告)号：WO2007120940A3
公开(公告)日：2008-01-17
申请号：PCT/US2007060123
申请日：2007-01-04
申请人： QUALCOMM INC , MUKKAVILLI KRISHNA KIRAN , LING FUYUN , WALKER GORDON KENT , CHARI MURALI RAMASWAMY
发明人： MUKKAVILLI KRISHNA KIRAN , LING FUYUN , WALKER GORDON KENT , CHARI MURALI RAMASWAMY
IPC分类号： G01S19/06 , G01S5/02 , G01S19/25 , H04L27/26 , H04W64/00
CPC分类号： G01S5/0205 , H04L5/0053 , H04W24/00 , H04W64/00
摘要： Methods and apparatus for position location in a wireless network. In an aspect, a method is provided that includes determining whether a symbol (234) to be transmitted is an active symbol, wherein the symbol comprises a plurality of subcarriers, and encoding identification information on a first portion of subcarriers if it is determined that the symbol is the active symbol (236). The method also includes encoding idle information on a second portion of subcarriers if it is determined that the symbol in not the active symbol. In an aspect, an apparatus includes detector logic configured to decode a plurality of symbols to determine identification information that identifies a plurality of transmitters, and to determine a plurality of channel estimate associated with the plurality of transmitters. The apparatus also includes position determination logic configured to calculate a device position based on the plurality of transmitters and the plurality of channel estimates.
摘要翻译：无线网络中位置定位的方法和装置。一方面，提供了一种方法，其包括确定要发送的符号（234）是否是活动符号，其中，所述符号包括多个子载波，以及如果确定所述子载波的第一部分，则对所述子载波的第一部分进行编码识别信息符号是活动符号（236）。如果确定不在活动符号中的符号，则该方法还包括对子载波的第二部分上的空闲信息进行编码。一方面，一种装置包括检测器逻辑，其被配置为对多个符号进行解码以确定标识多个发射机的识别信息，并且确定与多个发射机相关联的多个信道估计。该装置还包括位置确定逻辑，其被配置为基于多个发射机和多个信道估计来计算设备位置。

4. 发明申请

WO2007014360A3 SYSTEM AND METHOD FOR A FORWARD LINK ONLY PHYSICAL LAYER 审中-公开
标题翻译：仅用于前向链接物理层的系统和方法
公开(公告)号：WO2007014360A3
公开(公告)日：2007-04-19
申请号：PCT/US2006029621
申请日：2006-07-27
申请人： QUALCOMM INC , LING FUYUN , CHARI MURALI RAMASWAMY , VIJAYAN RAJIV , MANTRAVADI ASHOK , GUPTA ALOK KUMAR , MUKKAVILLI KRISHNA KIRAN , WANG MICHAEL MAO , VRCELJ BOJAN , COLLINS BRUCE
发明人： LING FUYUN , CHARI MURALI RAMASWAMY , VIJAYAN RAJIV , MANTRAVADI ASHOK , GUPTA ALOK KUMAR , MUKKAVILLI KRISHNA KIRAN , WANG MICHAEL MAO , VRCELJ BOJAN , COLLINS BRUCE
IPC分类号： H04L12/56 , H04W88/02 , H04W92/10
CPC分类号： H04L1/0002 , H04L1/0017 , H04L1/0041 , H04L1/0075 , H04L5/0007 , H04L5/0048 , H04L27/2613 , H04L27/2647 , H04L27/2662 , H04L69/32 , H04W48/08 , H04W72/005 , H04W80/00 , H04W88/02 , H04W92/10
摘要： Systems and methods are provided for processing forward link only (FLO) signals. A device receives a FLO signal, processes a TDM pilot comprising a TDM Pilot 1, a TDM Pilot 2, a WIC, a LIC, a Transition Pilot Channel, and a Positioning Pilot, from the FLO signal, processes an overhead information symbol (OIS) comprising a wide-area OIS and a local-area OIS, from the FLO signal, processes an FDM pilot comprising a wide-area FDM pilot and a local-area FDM pilot, from the FLO signal; and processes data comprising wide-area data and local-area data, from the FLO signal.
摘要翻译：提供用于处理仅前向链路（FLO）信号的系统和方法。设备接收FLO信号，根据FLO信号处理包括TDM导频1，TDM导频2，WIC，LIC，转换导频信道和定位导频的TDM导频，处理开销信息符号（OIS ）包括来自FLO信号的广域OIS和局域OIS，从FLO信号处理包括广域FDM导频和局域FDM导频的FDM导频; 并且从FLO信号处理包括广域数据和局域数据的数据。

5. 发明申请

WO2009120809A3 DETECTION OF SYMBOLS OF A SIGNALLING PARAMETERS CHANNEL IN A MULTICARRIER RECEIVER 审中-公开
标题翻译：在多功能接收机中检测信号参数信道的符号
公开(公告)号：WO2009120809A3
公开(公告)日：2010-03-11
申请号：PCT/US2009038305
申请日：2009-03-25
申请人： QUALCOMM INC , MUKKAVILLI KRISHNA KIRAN , MANTRAVADI ASHOK , VAN VEEN DURK L , CHARI MURALI RAMASWAMY , KRISHNAMOORTHI RAGHURAMAN , KRISHNAMURTHI RAJEEV , LING FUYUN
发明人： MUKKAVILLI KRISHNA KIRAN , MANTRAVADI ASHOK , VAN VEEN DURK L , CHARI MURALI RAMASWAMY , KRISHNAMOORTHI RAGHURAMAN , KRISHNAMURTHI RAJEEV , LING FUYUN
IPC分类号： H04L23/02 , H04L5/00 , H04L25/02 , H04L27/26
CPC分类号： H04L23/02 , H04L5/0053 , H04L25/0206 , H04L25/0218 , H04L25/023 , H04L27/2613 , H04L27/2647
摘要： Signal parameter information is derived by: a) collecting time-domain samples (y(n)) of a signal parameter channel; b) performing an FFT to obtain corresponding frequency domain samples (Y (k)); c) selecting one possible parameter (i) and descrambling the frequency domain samples; d) extrapolating to extendthe result to 512 samples; e) performing a 512 point FFT to obtain a time domain channel estimation (hi (n) ) corresponding to the selected parameter f) computing the sum of energies (Ei) of the channel taps which exceed a selected threshold; g) repeating c) to f) for the other possible parameters; h) determining the parameter which has the maximum value of Ei.
摘要翻译：信号参数信息通过以下方式得出：a）收集信号参数信道的时域样本（y（n））; b）执行FFT以获得对应的频域采样（Y（k））; c）选择一个可能的参数（i）并解扰频域采样; d）外推，将结果扩展到512个样本; e）执行512点FFT以获得对应于所选参数的时域信道估计（hi（n））f）计算超过选定阈值的信道抽头的能量之和（Ei）; g）重复c）到f）其他可能的参数; h）确定具有最大值Ei的参数。

6. 发明申请

WO2009015332A3 METHOD AND APPARATUS FOR SENSING SIGNALLING PARAMETERS IN A WIRELESS COMMUNICATIONS NETWORK 审中-公开
标题翻译：用于无线通信网络中传感信号参数的方法与装置
公开(公告)号：WO2009015332A3
公开(公告)日：2009-08-20
申请号：PCT/US2008071182
申请日：2008-07-25
申请人： QUALCOMM INC , VAN VEEN DURK L , MANTRAVADI ASHOK , KRISHNAMOORTHI RAGHURAMAN , CHARI MURALI RAMASWAMY , MUKKAVILLI KRISHNA KIRAN , LING FUYUN
发明人： VAN VEEN DURK L , MANTRAVADI ASHOK , KRISHNAMOORTHI RAGHURAMAN , CHARI MURALI RAMASWAMY , MUKKAVILLI KRISHNA KIRAN , LING FUYUN
IPC分类号： H04L27/26 , H04L5/00 , H04W28/18
CPC分类号： H04L27/2613 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L5/0053 , H04L5/008 , H04L5/0094 , H04L27/2607 , H04L27/2626 , H04L27/2628 , H04L27/2647 , H04L27/2656
摘要： A new channel is added to FLO networks that carries embedded signaling parameter information. The design is such that regardless of the actual values of the signaling parameters conveyed, a receiver will be able to demodulate this new channel. Moreover, the addition of the new channel does not render a FLO network that has been so configured to not be backwards-compatible with existing devices.
摘要翻译：一个新的信道被添加到携带嵌入式信令参数信息的FLO网络中。这种设计使得无论传达的信令参数的实际值如何，接收机将能够解调这个新的信道。此外，添加新频道并不会使FLO网络被配置为不与现有设备向后兼容。

7. 发明申请

WO2008083303A3 METHODS AND APPARATUSES FOR REDUCING INTER-CARRIER INTERFERENCE IN AN OFDM SYSTEM 审中-公开
标题翻译：用于减少OFDM系统中的载波间干扰的方法和装置
公开(公告)号：WO2008083303A3
公开(公告)日：2008-09-12
申请号：PCT/US2007089086
申请日：2007-12-28
申请人： QUALCOMM INC , TIAN TAO , KRISHNAMOORTHI RAGHURAMAN , MUKKAVILLI KRISHNA KIRAN , LING FUYUN
发明人： TIAN TAO , KRISHNAMOORTHI RAGHURAMAN , MUKKAVILLI KRISHNA KIRAN , LING FUYUN
IPC分类号： H04L27/26 , H04B1/10
CPC分类号： H04L27/2657
摘要： An OFDM telecommunications system includes a transmitter and a receiver. The receiver includes a canceller configured to reduce inter-carrier interference (ICI) in an OFDM symbol in the frequency domain.
摘要翻译： OFDM电信系统包括发射机和接收机。接收机包括被配置为减少频域中的OFDM符号中的载波间干扰（ICI）的消除器。

8. 发明申请

WO2005043829A2 LOCAL AND WIDE-AREA TRANSMISSIONS IN A WIRELESS BROADCAST NETWORK 审中-公开
标题翻译：无线广播网络中的局域和广域传输
公开(公告)号：WO2005043829A2
公开(公告)日：2005-05-12
申请号：PCT/US2004034883
申请日：2004-10-22
申请人： QUALCOMM INC , MURALI RAMASWAMY , LING FUYUN , VIJAYAN RAJIV , WALKER KENT G , MANTRAVADI ASHOK
发明人： MURALI RAMASWAMY , LING FUYUN , VIJAYAN RAJIV , WALKER KENT G , MANTRAVADI ASHOK
IPC分类号： H04L12/18 , H04L12/56 , H04W74/04 , H04W88/08 , H04L12/28
CPC分类号： H04L5/0041 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L12/189 , H04W72/005
摘要： To broadcast different types of transmission having different tiers of coverage in a wireless broadcast network, each base station processes data for a wide-area transmission in accordance with a first mode (or coding and modulation scheme) to generate data symbols for the wide-area transmission and processes data for a local transmission in accordance with a second mode to generate data symbols for the local transmission. The first and second modes are selected based on the desired coverage for wide-area and local transmissions, respectively. The base station also generates pilots and overhead information for local and wide-area transmissions. The data, pilots, and overhead information for local and wide-area transmissions are multiplexed onto their transmission spans, which may be different sets of frequency subbands, different time segments, or different groups of subbands in different time segments. More than two different types of transmission may also be multiplexed and broadcast.
摘要翻译：为了在无线广播网络中广播具有不同覆盖层的不同类型的传输，每个基站根据第一模式（或编码和调制方案）处理用于广域传输的数据以生成用于广域的数据符号根据第二模式传输和处理本地传输的数据以生成本地传输的数据符号。第一和第二模式分别基于广域和本地传输的期望覆盖范围来选择。基站还为本地和广域传输生成导频和开销信息。用于本地和广域传输的数据，导频和开销信息被复用到它们的传输跨度上，其可以是不同的频率子带组，不同的时间段或不同的时间段中的不同组的子带。多于两种不同类型的传输也可以被复用和广播。

9. 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）。

10. 发明申请

WO2007053842A8 METHODS AND APPARATUS FOR DETERMINING TIMING IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：用于确定无线通信系统中的时序的方法和装置
公开(公告)号：WO2007053842A8
公开(公告)日：2008-04-03
申请号：PCT/US2006060413
申请日：2006-10-31
申请人： QUALCOMM INC , VRCELJ BOJAN , LING FUYUN , WANG MICHAEL MAO
发明人： VRCELJ BOJAN , LING FUYUN , WANG MICHAEL MAO
IPC分类号： H04L27/26
CPC分类号： H04L27/2662 , H04L27/2676
摘要： Methods and apparatus for setting timing of sampling of one or more symbols. The disclosed methods account for at least three types of effective interference (EI) and are used to set the timing of a sampling window for sampling received symbols. The methods includes setting timing based on determining an energy density function accounting for both static and dynamic EI, determining the minimum of a total energy profile and sliding the sampling window to ensure that the minimum point is at a predetermined point, and determining and using a composite energy profile accounting for short term and long term fading effects. The disclosed apparatus include a transceiver employing one or more of the disclosed methods for setting timing when receiving the symbols.
摘要翻译：用于设置一个或多个符号的采样定时的方法和装置。所公开的方法至少有三种类型的有效干扰（EI），并且用于设置用于采样接收符号的采样窗口的定时。所述方法包括基于确定静态和动态EI两者的能量密度函数来设定定时，确定总能量分布的最小值，并滑动采样窗口以确保最小点处于预定点，以及确定和使用复合能量曲线描述短期和长期衰落影响。所公开的装置包括采用一种或多种所述方法的收发机，用于在接收符号时设置定时。

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