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1. 发明申请

WO2009120640A3 APPARATUS, PROCESSES, AND ARTICLES OF MANUFACTURE FOR FAST FOURIER TRANSFORMATION AND BEACON SEARCHING 审中-公开
标题翻译：装置，工艺和制造快速FOURIER变换和BEACON搜索的文章
公开(公告)号：WO2009120640A3
公开(公告)日：2011-01-20
申请号：PCT/US2009037989
申请日：2009-03-23
申请人： QUALCOMM INC , SAMPATH HEMANTH , ZHANG XIN , LIN JEREMY H , SHARMA NISTHA , PALANKI RAVI , KANDUKURI NARAYANA SUNIL KUMAR
发明人： SAMPATH HEMANTH , ZHANG XIN , LIN JEREMY H , SHARMA NISTHA , PALANKI RAVI , KANDUKURI NARAYANA SUNIL KUMAR
IPC分类号： G06F17/14
CPC分类号： G06F17/142 , H04L5/0007 , H04L5/0023 , H04L5/0053 , H04L27/265
摘要： In embodiments, a wireless receiver employs a hardware-based Fast Fourier Transform (FFT) engine controlled by firmware. The FFT engine executes tasks stored in a task list. Each task is associated with a different portion of a signal, for example, one or more Orthogonal Frequency Division Modulated (OFDM) symbols. Each task may include configuration information for the FFT engine for configuring the engine to process the associated portion of the signal, a pointer to the portion to be processed, and another pointer to the memory for storing the output. The task list may be firmware controlled. Division of the FFT into a configurable hardware part driven by firmware to read and execute the tasks in the task list may speed up the FFT process and make it more flexible. A hardware beacon sorter may be coupled to the FFT engine to sort the sub-carriers according to their energies.
摘要翻译：在实施例中，无线接收机采用由固件控制的基于硬件的快速傅立叶变换（FFT）引擎。 FFT引擎执行任务列表中存储的任务。每个任务与信号的不同部分相关联，例如一个或多个正交频分调制（OFDM）符号。每个任务可以包括用于配置引擎以处理信号的相关部分的引擎的FFT引擎的配置信息，到要处理的部分的指针，以及用于存储输出的另一个指向存储器的指针。任务列表可以是固件控制的。将FFT分解为由固件驱动的可配置硬件部分，以读取和执行任务列表中的任务，可加速FFT过程并使其更加灵活。硬件信标分类器可以耦合到FFT引擎，以根据它们的能量对子载波进行分类。

2. 发明申请

WO2009142815A3 SYSTEMS AND METHODS FOR SENDING AN ACKNOWLEDGMENT MESSAGE IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：在无线通信系统中发送确认消息的系统和方法
公开(公告)号：WO2009142815A3
公开(公告)日：2010-04-29
申请号：PCT/US2009038209
申请日：2009-03-25
申请人： QUALCOMM INC , CHAUDHURI ARUNAVA , SAMPATH HEMANTH , CHALLA RAGHU N , PALANKI RAVI , KANDUKURI NARAYANA SUNIL KUMAR
发明人： CHAUDHURI ARUNAVA , SAMPATH HEMANTH , CHALLA RAGHU N , PALANKI RAVI , KANDUKURI NARAYANA SUNIL KUMAR
IPC分类号： H04L1/16
CPC分类号： H04L1/20 , H04L1/1607 , H04L1/208
摘要： A method for sending an acknowledgment message in a wireless communication system is disclosed. A first signal is received before receiving a second signal from a transmitter. Decoded first data is extracted from the first signal. A third signal is produced by encoding and modulating the decoded first data. The second signal is demodulated to produce second symbols. The third signal and the second symbols are correlated.
摘要翻译：公开了一种用于在无线通信系统中发送确认消息的方法。在从发射机接收第二信号之前接收第一信号。从第一信号中提取解码的第一数据。通过对解码的第一数据进行编码和调制来产生第三信号。第二信号被解调以产生第二符号。第三信号和第二符号相关。

3. 发明申请

WO2009120456A2 BIT-WIDTH MINIMIZATION SCHEME FOR WIRELESS COMMUNICATION 审中-公开
标题翻译：用于无线通信的位宽最小化方案
公开(公告)号：WO2009120456A2
公开(公告)日：2009-10-01
申请号：PCT/US2009035768
申请日：2009-03-02
申请人： QUALCOMM INC , KANDUKURI NARAYANA SUNIL KUMAR , SAMPATH HEMANTH , VERMANI SAMEER
发明人： KANDUKURI NARAYANA SUNIL KUMAR , SAMPATH HEMANTH , VERMANI SAMEER
IPC分类号： H04L1/06 , H04L5/02 , H04L27/26
CPC分类号： H04L27/0008 , H04B1/707 , H04J13/00 , H04L1/0071 , H04L5/0007 , H04L5/0016 , H04L5/0023 , H04L5/0048 , H04L25/03343 , H04L25/03866 , H04L27/0012 , H04L27/2626
摘要： A technique for generating a reduced bit-width in a signal generated by a first-type modulator in a communication apparatus that includes two distinct modulators. In particular, the communication apparatus includes a first modulator adapted to generate a first modulated signal quantified to a first bit-width, a second modulator adapted to generate a second modulated signal quantified to a second bit-width that is less than the first bit-width, and a device to generate a third modulated signal comprising a combination of the first and second modulated signals. In an exemplary implementation, the first modulator includes an OFDMA modulator, the second modulator includes a CDMA, and the combining device includes an IFFT. Additionally, an apparatus for processing a communication signal includes a tasklist cache memory having a tasklist, a processor adapted to provide a task to the tasklist, and a communication module adapted to fetch the task from the tasklist, and process the communication signal based on the retrieved task.
摘要翻译：一种用于在包括两个不同调制器的通信设备中生成由第一类型调制器生成的信号中的减小的比特宽度的技术。特别地，通信设备包括：第一调制器，适于生成量化为第一比特宽度的第一调制信号;第二调制器，适于生成量化为小于第一比特宽度的第二比特宽度的第二调制信号; 宽度，以及用于生成包括第一和第二调制信号的组合的第三调制信号的设备。在示例性实现中，第一调制器包括OFDMA调制器，第二调制器包括CDMA，并且组合设备包括IFFT。另外，用于处理通信信号的设备包括具有任务列表的任务列表高速缓冲存储器，适用于向任务列表提供任务的处理器，以及适用于从任务列表提取任务的通信模块，并且基于检索任务。

4. 发明申请

WO2009120725A3 SYSTEMS AND METHODS FOR CANCELING INTERFERENCE IN A COMMUNICATION SYSTEM 审中-公开
标题翻译：用于消除通信系统中干扰的系统和方法
公开(公告)号：WO2009120725A3
公开(公告)日：2009-11-19
申请号：PCT/US2009038147
申请日：2009-03-24
申请人： QUALCOMM INC , KANDUKURI NARAYANA SUNIL KUMAR
发明人： KANDUKURI NARAYANA SUNIL KUMAR
IPC分类号： H04B1/707 , H04L5/00
CPC分类号： H04J11/004 , H04L25/0204 , H04L25/0224 , H04L27/2647
摘要： Systems and methods for canceling interference in a communication system are described. A signal that comprises current data from a current access point and secondary data from one or more secondary access points is received. The secondary data is demodulated using one or more secondary channel estimates if a signal metric is less than a predetermined threshold. Interference in the received signal is canceled using the demodulated secondary data if the signal metric is less than the predetermined threshold. The received signal with the interference canceled is demodulated using a current channel estimate to obtain the current data. The method for interference cancellation may use the same hardware resources and processing available for receiving data from a single access point.
摘要翻译：描述了用于消除通信系统中的干扰的系统和方法。接收包括来自当前接入点的当前数据和来自一个或多个次级接入点的次级数据的信号。如果信号度量小于预定阈值，则使用一个或多个辅助信道估计对辅助数据进行解调。如果信号度量小于预定阈值，则使用解调后的辅助数据来抵消接收信号中的干扰。利用当前信道估计对接收到的具有抵消干扰的信号进行解调以获得当前数据。用于干扰消除的方法可以使用可用于从单个接入点接收数据的相同硬件资源和处理。

5. 发明申请

WO2011002935A3 TIME TRACKING LOOPS FOR A MULTICARRIER COMMUNICATION SYSTEM UTILIZING A CYCLIC PREFIX 审中-公开
标题翻译：使用循环前缀的多媒体通信系统的时间跟踪
公开(公告)号：WO2011002935A3
公开(公告)日：2011-03-31
申请号：PCT/US2010040675
申请日：2010-06-30
申请人： QUALCOMM INC , SRINIVASAN SHIVRATNA G , MCCLOUD MICHAEL L , GURSKI REMI J , KANDUKURI NARAYANA SUNIL KUMAR
发明人： SRINIVASAN SHIVRATNA G , MCCLOUD MICHAEL L , GURSKI REMI J , KANDUKURI NARAYANA SUNIL KUMAR
IPC分类号： H04L27/26 , H04L25/02
CPC分类号： H04L27/2662 , H04L25/0212 , H04L27/2665
摘要： Techniques for performing time tracking in a communication system utilizing a cyclic prefix are described. In an aspect, a receiver may detect for large timing errors based on early and late received samples obtained with early and late FFT windows, respectively. The receiver may derive first and second channel impulse response (CIR) estimates based on the early and late received samples, respectively, determine an early channel energy based on the first CIR estimate, determine a late channel energy based on the second CIR estimate, compute an update amount based on the early and late channel energies, and update the FFT window position based on the update amount. In another aspect, the receiver may perform time tracking with an inner time tracking loop (TTL) and an outer TTL. The receiver may update the FFT window position in coarse steps with the outer TTL and in fine steps with the inner TTL.
摘要翻译：描述了在利用循环前缀的通信系统中执行时间跟踪的技术。在一方面，接收机可以分别基于早期和晚期FFT窗口获得的早期和晚期接收样本来检测大的定时误差。接收机可以基于早期和晚期接收的采样分别导出第一和第二信道脉冲响应（CIR）估计，基于第一CIR估计确定早期信道能量，基于第二CIR估计确定后期信道能量，计算基于早期和晚期信道能量的更新量，并且基于更新量来更新FFT窗口位置。在另一方面，接收机可以利用内部时间跟踪环（TTL）和外部TTL来执行时间跟踪。接收机可以以外部TTL以粗略的步骤更新FFT窗口位置，并以内部TTL进行微调。

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