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1. 发明申请

US20090245092A1 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：US20090245092A1
公开(公告)日：2009-10-01
申请号：US12408378
申请日：2009-03-20
申请人： Hemanth Sampath , Xin Zhang , Jeremy H. Lin , Nistha Sharma , Ravi Palanki , Sunil K. Kandukuri Narayan
发明人： Hemanth Sampath , Xin Zhang , Jeremy H. Lin , Nistha Sharma , Ravi Palanki , Sunil K. Kandukuri Narayan
IPC分类号： H04J11/00 , 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里叶变换（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. 发明授权

US09083524B2 Systems and methods for sending an acknowledgement message in a wireless communication system 有权
标题翻译：用于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：US09083524B2
公开(公告)日：2015-07-14
申请号：US12409832
申请日：2009-03-24
申请人： Arunava Chaudhuri , Hemanth Sampath , Raghu N. Challa , Ravi Palanki , Sunil K. Kandukuri Narayan
发明人： Arunava Chaudhuri , Hemanth Sampath , Raghu N. Challa , Ravi Palanki , Sunil K. Kandukuri Narayan
IPC分类号： H04L1/20 , 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. 发明授权

US08199739B2 Return link time adjustments in FDD OFDMA or SC-FDM systems 有权
标题翻译：在FDD OFDMA或SC-FDM系统中返回链路时间调整
公开(公告)号：US08199739B2
公开(公告)日：2012-06-12
申请号：US12408355
申请日：2009-03-20
申请人： Hemanth Sampath , Jeremy H. Lin , Sunil K. Kandukuri Narayan , Sameer Vermani
发明人： Hemanth Sampath , Jeremy H. Lin , Sunil K. Kandukuri Narayan , Sameer Vermani
IPC分类号： H04J1/00
CPC分类号： H04L27/2607 , H04L27/2655
摘要： A method for adjusting timing in a Frequency Division Multiplexing (FDM) system, including receiving a request to perform a timing correction, generating a time domain FDM symbol, and controlling the timing correction in the time domain FDM symbol by at least one of adjusting a length of a cyclic prefix, overlapping a portion of adjacent FDM symbols, adjusting a symbol windowing length, or utilizing a return link (RL) silence interval.
摘要翻译：一种用于在频分复用（FDM）系统中调整定时的方法，包括接收执行定时校正的请求，产生时域FDM符号，以及通过以下步骤中的至少一个来控制时域FDM符号中的定时校正：循环前缀的长度，与相邻FDM符号的一部分重叠，调整符号加窗长度，或利用返回链路（RL）静默间隔。

4. 发明申请

US20090245222A1 RETURN LINK TIME ADJUSTMENTS IN FDD OFDMA OR SC-FDM SYSTEMS 有权
标题翻译：在FDD OFDMA或SC-FDM系统中返回链路时间调整
公开(公告)号：US20090245222A1
公开(公告)日：2009-10-01
申请号：US12408355
申请日：2009-03-20
申请人： Hemanth Sampath , Jeremy H. Lin , Sunil K. Kandukuri Narayan , Sameer Vermani
发明人： Hemanth Sampath , Jeremy H. Lin , Sunil K. Kandukuri Narayan , Sameer Vermani
IPC分类号： H04J1/00
CPC分类号： H04L27/2607 , H04L27/2655
摘要： A method for adjusting timing in a Frequency Division Multiplexing (FDM) system, including receiving a request to perform a timing correction, generating a time domain FDM symbol, and controlling the timing correction in the time domain FDM symbol by at least one of adjusting a length of a cyclic prefix, overlapping a portion of adjacent FDM symbols, adjusting a symbol windowing length, or utilizing a return link (RL) silence interval.
摘要翻译：一种用于在频分复用（FDM）系统中调整定时的方法，包括接收执行定时校正的请求，产生时域FDM符号，以及通过以下步骤中的至少一个来控制时域FDM符号中的定时校正：循环前缀的长度，与相邻FDM符号的一部分重叠，调整符号加窗长度，或利用返回链路（RL）静默间隔。

5. 发明申请

US20120147795A1 APPARATUS, METHODS, AND ARTICLES OF MANUFACTURE FOR ADAPTIVE POWER CONTROL 有权
标题翻译：装置，方法和制造自适应功率控制的文章
公开(公告)号：US20120147795A1
公开(公告)日：2012-06-14
申请号：US12408346
申请日：2009-03-20
申请人： Sunil K. Kandukuri Narayan , Hemanth Sampath
发明人： Sunil K. Kandukuri Narayan , Hemanth Sampath
IPC分类号： H04W4/00 , H04J1/00
CPC分类号： H04W52/362
摘要： In embodiments, a first wireless device generates symbols for transmission to another wireless device. Adaptive power control is applied to the transmissions, for example, at symbol or frame boundaries. When a transmit power gain adjustment exceeds a threshold, all or part of the gain adjustment may be performed on the generated symbols before the symbols are combined in an overlap-and-add process. Part of the gain adjustment may also be performed through adjustment of the power amplifier. When the gain adjustment does not exceed the threshold, all of the gain adjustment may be performed through adjustment of the power amplifier. Performing gain adjustment before the overlap-and-add process results in a lower spectral spread of the transmitted waveform and improved bandwidth utilization efficiency. In embodiments, the power adjustment techniques are used in FDD/OFDM systems or other systems where a plurality of symbols or frames is transmitted substantially continuously.
摘要翻译：在实施例中，第一无线设备生成用于传输到另一无线设备的符号。自适应功率控制被应用于传输，例如在符号或帧边界。当发射功率增益调整超过阈值时，可以在符号在重叠和相加处理中组合之前对生成的符号执行全部或部分增益调整。增益调整的一部分也可以通过功率放大器的调节来执行。当增益调整不超过阈值时，可以通过功率放大器的调节来执行所有增益调整。在重叠和添加过程之前执行增益调整会导致传输波形的较低频谱扩展，并提高带宽利用率。在实施例中，功率调整技术用于FDD / OFDM系统或其中基本连续地发送多个符号或帧的其他系统。

6. 发明申请

US20090245422A1 METHOD AND SYSTEM FOR TRANSMIT UPSAMPLING VIA IFFT 有权
标题翻译：通过IFFT发送UPS的方法和系统
公开(公告)号：US20090245422A1
公开(公告)日：2009-10-01
申请号：US12408631
申请日：2009-03-20
申请人： Hemanth Sampath , Sunil K. Kandukuri Narayan
发明人： Hemanth Sampath , Sunil K. Kandukuri Narayan
IPC分类号： H04L27/12
CPC分类号： H04L27/2628 , H04L27/2644
摘要： A technique for eliminating from or reducing the complexity of an upsampler/interpolator of a transmit system. In general, the technique involves configuring an IFFT to perform both the conversion of a modulated signal from frequency to time domain, and at least a portion of the upsampling from the first sampling rate towards the sampling rate of a DAC. In one embodiment, the IFFT is configured to have a bandwidth substantially equal to the sampling rate of a DAC. In this embodiment, the upsampler/interpolator may be totally eliminated. In another embodiment, the IFFT is configured to have a bandwidth that is greater than the first sampling rate of the modulated signal, and lower than the sampling rate of the DAC. In this embodiment, a simpler upsampler/interpolator may be employed to perform the remaining upsampling from the IFFT bandwidth to the sampling rate of the DAC.
摘要翻译：用于消除或降低发射系统的上采样器/内插器的复杂性的技术。通常，该技术涉及配置IFFT以执行调制信号从频域到时域的转换以及从第一采样速率向DAC的采样速率的上采样的至少一部分。在一个实施例中，IFFT被配置为具有基本上等于DAC的采样率的带宽。在本实施例中，可以完全消除上采样器/内插器。在另一个实施例中，IFFT被配置为具有大于调制信号的第一采样率的带宽，并且低于DAC的采样率。在该实施例中，可以采用更简单的上采样器/内插器来执行从IFFT带宽到DAC的采样率的剩余上采样。

7. 发明授权

US08064330B2 Bit-width minimization scheme for wireless communication 有权
标题翻译：无线通信的位宽最小化方案
公开(公告)号：US08064330B2
公开(公告)日：2011-11-22
申请号：US12391951
申请日：2009-02-24
申请人： Sunil K. Kandukuri Narayan , Hemanth Sampath , Sameer Vermani
发明人： Sunil K. Kandukuri Narayan , Hemanth Sampath , Sameer Vermani
IPC分类号： H04J1/00 , H04B7/216 , H04L25/03
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产生由第一类型调制器产生的信号中的减小位宽的技术。具体地，通信装置包括适于产生量化为第一位宽的第一调制信号的第一调制器，适于产生量化为小于第一位宽的第二位宽的第二调制信号的第二调制器，宽度，以及用于产生包括第一和第二调制信号的组合的第三调制信号的装置。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装置包括具有任务列表的任务表高速缓冲存储器，适于向任务列表提供任务的处理器，以及适于从任务列表中取出任务的通信模块，以及基于检索任务。

8. 发明申请

US20090245089A1 BIT-WIDTH MINIMIZATION SCHEME FOR WIRELESS COMMUNICATION 有权
标题翻译：无线通信双向优化最小化方案
公开(公告)号：US20090245089A1
公开(公告)日：2009-10-01
申请号：US12391951
申请日：2009-02-24
申请人： Sunil K. Kandukuri Narayan , Hemanth Sampath , Sameer Vermani
发明人： Sunil K. Kandukuri Narayan , Hemanth Sampath , Sameer Vermani
IPC分类号： H04J11/00 , H04L27/00
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产生由第一类型调制器产生的信号中的减小位宽的技术。具体地，通信装置包括适于产生量化为第一位宽的第一调制信号的第一调制器，适于产生量化为小于第一位宽的第二位宽的第二调制信号的第二调制器，宽度，以及用于产生包括第一和第二调制信号的组合的第三调制信号的装置。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装置包括具有任务列表的任务表高速缓存存储器，适于向任务列表提供任务的处理器，以及适于从任务列表中取出任务的通信模块，以及基于检索任务。

9. 发明申请

US20090245230A1 COMPENSATING FOR DRIFTS OCCURRING DURING SLEEP TIMES IN ACCESS TERMINALS 有权
标题翻译：对接入终端中的休眠时间发生的升级进行补偿
公开(公告)号：US20090245230A1
公开(公告)日：2009-10-01
申请号：US12407467
申请日：2009-03-19
申请人： Hemanth Sampath , Ravi Palanki , Jeremy H. Lin , Tamer A. Kadous
发明人： Hemanth Sampath , Ravi Palanki , Jeremy H. Lin , Tamer A. Kadous
IPC分类号： H04J3/06 , H04W68/00
CPC分类号： H04W52/0274 , Y02D70/1222 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/146
摘要： A method and apparatus are presented for compensating drifts in access terminals occurring during a sleep time. The method includes determining whether a sleep time exceeds a threshold, buffering time domain samples containing acquisition pilots and a paging channel, powering down RF circuitry in the access terminal after buffering samples, processing the samples to compensate for drift, and determining whether the access terminal was paged based upon the processed samples. The apparatus includes a digital front end, an FFT engine coupled to the digital front end, a symbol buffer coupled to the FFT engine, a processor coupled to the digital front end, FFT engine, and symbol buffer, and a memory coupled to the processor, the memory further comprising instructions for executing the method.
摘要翻译：提出一种用于补偿在睡眠时间期间发生的接入终端中的漂移的方法和装置。该方法包括：确定休眠时间是否超过阈值，缓冲包含采集导频的时域采样和寻呼信道，在缓冲采样之后对接入终端中的RF电路进行供电，处理采样以补偿漂移，以及确定接入终端根据加工样品进行分页。该装置包括数字前端，耦合到数字前端的FFT引擎，耦合到FFT引擎的符号缓冲器，耦合到数字前端的处理器，FFT引擎和符号缓冲器以及耦合到处理器的存储器所述存储器还包括用于执行所述方法的指令。

10. 发明授权

US09100254B2 Method and system for transmit upsampling via IFFT 有权
标题翻译：通过IFFT传输上采样的方法和系统
公开(公告)号：US09100254B2
公开(公告)日：2015-08-04
申请号：US12408631
申请日：2009-03-20
申请人： Hemanth Sampath , Sunil K. Kandukuri Narayan
发明人： Hemanth Sampath , Sunil K. Kandukuri Narayan
IPC分类号： H04L27/12 , H04L27/26
CPC分类号： H04L27/2628 , H04L27/2644
摘要： A technique for eliminating from or reducing the complexity of an upsampler/interpolator of a transmit system. In general, the technique involves configuring an IFFT to perform both the conversion of a modulated signal from frequency to time domain, and at least a portion of the upsampling from the first sampling rate towards the sampling rate of a DAC. In one embodiment, the IFFT is configured to have a bandwidth substantially equal to the sampling rate of a DAC. In this embodiment, the upsampler/interpolator may be totally eliminated. In another embodiment, the IFFT is configured to have a bandwidth that is greater than the first sampling rate of the modulated signal, and lower than the sampling rate of the DAC. In this embodiment, a simpler upsampler/interpolator may be employed to perform the remaining upsampling from the IFFT bandwidth to the sampling rate of the DAC.
摘要翻译：用于消除或降低发射系统的上采样器/内插器的复杂性的技术。通常，该技术涉及配置IFFT以执行调制信号从频域到时域的转换以及从第一采样速率向DAC的采样速率的上采样的至少一部分。在一个实施例中，IFFT被配置为具有基本上等于DAC的采样率的带宽。在本实施例中，可以完全消除上采样器/内插器。在另一个实施例中，IFFT被配置为具有大于调制信号的第一采样率的带宽，并且低于DAC的采样率。在该实施例中，可以采用更简单的上采样器/内插器来执行从IFFT带宽到DAC的采样率的剩余上采样。

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