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1. 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。

2. 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。

3. 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。

4. 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。

5. 发明授权

US09184810B2 Scheduling algorithms for multi-user (MU) multiple-input multiple-output (MIMO) communication systems 有权
标题翻译：多用户（MU）多输入多输出（MIMO）通信系统的调度算法
公开(公告)号：US09184810B2
公开(公告)日：2015-11-10
申请号：US13465522
申请日：2012-05-07
申请人： Zhi Quan , Simone Merlin , Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath
发明人： Zhi Quan , Simone Merlin , Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath
IPC分类号： H04W4/00 , H04B7/04 , H04W72/12
CPC分类号： H04B7/0452 , H04W72/12 , H04W72/1221
摘要： A method is provided for wirelessly transmitting from a transmitter to one or more receivers within a multi-user (MU) multiple-input and multiple-output (MIMO) communication system. A number of concurrent (spatial) streams are dynamically allocated in a MU-MIMO transmission to each of a plurality of served receivers to maximize total data transmitted on each transmission. Streams are allocated according to a corresponding transmission queue length for each receiver and the number of receive antennas used by each of the served receivers. A transmission timer is started upon sending the transmission. A random backoff counter is also started upon one of either: (a) expiration of the transmission timer or (b) receipt of data at a transmission queue. A new transmission is sent upon expiration of the random backoff counter if the transmission timer has expired. Otherwise, the random backoff counter is restarted one or more times until the transmission timer has expired.
摘要翻译：提供了一种用于从多用户（MU）多输入（MIMO）通信系统中的发射机向一个或多个接收机进行无线发射的方法。在MU-MIMO传输中动态地将多个并行（空间）流分配给多个服务接收机中的每一个，以最大化在每个传输上传输的总数据。流根据每个接收机的相应传输队列长度和每个被服务接收机使用的接收天线的数量来分配。传送定时器在发送传输时开始。以下之一也开始随机退避计数器：（a）传输定时器到期或（b）在传输队列处接收数据。如果发送定时器已经到期，则在随机退避计数器到期时发送新的传输。否则，随机退避计数器重新启动一次或多次，直到传输定时器到期。

6. 发明授权

US08923219B2 Method and apparatus for supporting adaptive channel state information feedback rate in multi-user communication systems 有权
标题翻译：在多用户通信系统中支持自适应信道状态信息反馈速率的方法和装置
公开(公告)号：US08923219B2
公开(公告)日：2014-12-30
申请号：US12958959
申请日：2010-12-02
申请人： Gregory A. Breit , Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath , Vincent Knowles Jones
发明人： Gregory A. Breit , Santosh Paul Abraham , Sameer Vermani , Hemanth Sampath , Vincent Knowles Jones
IPC分类号： H04W4/00 , H04L1/00 , H04B7/06 , H04L25/02 , H04L25/03 , H04L5/00
CPC分类号： H04L25/03343 , H04B7/0626 , H04B7/0658 , H04L1/0026 , H04L1/0029 , H04L1/003 , H04L5/0048 , H04L25/0204 , H04L25/0222 , H04L25/0228 , H04L2025/03426 , H04L2025/03777
摘要： Certain aspects of the present disclosure relate to techniques for achieving adaptive channel state information (CSI) feedback rate in multi-user communication systems. A rate by which CSI feedback can be transmitted from each user station of a wireless system to a serving access point may be adjusted based on evolution of a channel between that user station and the access point.
摘要翻译：本公开的某些方面涉及用于在多用户通信系统中实现自适应信道状态信息（CSI）反馈速率的技术。基于无线系统的每个用户站向服务接入点发送CSI反馈的速率可以基于该用户站与接入点之间的信道的演进来调整。

7. 发明授权

US08908600B2 Channel state information feedback frame format and feedback rules for very high throughput wireless systems 有权
标题翻译：信道状态信息反馈帧格式和非常高吞吐量无线系统的反馈规则
公开(公告)号：US08908600B2
公开(公告)日：2014-12-09
申请号：US13280776
申请日：2011-10-25
申请人： Hemanth Sampath , Didier Johannes Richard Van Nee , Sameer Vermani , Albert Van Zelst , Vincent Knowles Jones
发明人： Hemanth Sampath , Didier Johannes Richard Van Nee , Sameer Vermani , Albert Van Zelst , Vincent Knowles Jones
IPC分类号： H04L12/28 , H04J1/16 , G06F11/00 , G01R31/08
CPC分类号： H04B7/0626 , H04B7/0632
摘要： Certain aspects of the present disclosure provide techniques and apparatus for generating a unified format of channel state information (CSI) feedback for Very High Throughput (VHT) wireless systems. One example method generally includes generating, at a first apparatus, a frame comprising information relating to SNR if a second apparatus is communicating with the first apparatus using single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO) and transmitting a signal based on the generated frame to the second apparatus. Another example method generally includes generating, at an apparatus, a structure comprising CSI, wherein the CSI includes one of a first matrix with estimates of a channel associated with the apparatus or a second matrix obtained based on singular value decomposition (SVD) of the first matrix and wherein the structure further comprises an indication of which of the first and second matrices is included in the CSI; and transmitting the structure over the channel.
摘要翻译：本公开的某些方面提供用于为非常高吞吐量（VHT）无线系统生成统一格式的信道状态信息（CSI）反馈的技术和装置。一个示例性方法通常包括在第一装置处产生包括与SNR有关的信息的帧，如果第二装置使用单用户MIMO（SU-MIMO）或多用户MIMO（MU-MIMO）和第一装置正在与第一装置进行通信，则基于所生成的帧向第二装置发送信号。另一示例性方法通常包括在装置处生成包括CSI的结构，其中CSI包括具有与该装置相关联的信道的估计的第一矩阵之一或基于第一矩阵的奇异值分解（SVD）获得的第二矩阵矩阵，并且其中所述结构还包括所述CSI中包括所述第一和第二矩阵中的哪一个的指示; 并通过信道发送结构。

8. 发明授权

US08824371B2 Systems and methods for wireless communication of packets having a plurality of formats 有权
标题翻译：用于具有多种格式的分组的无线通信的系统和方法
公开(公告)号：US08824371B2
公开(公告)日：2014-09-02
申请号：US13466983
申请日：2012-05-08
申请人： Sameer Vermani , Santosh P. Abraham , Mohammad Hossein Taghavi Nasrabadi , Vincent K. Jones , Hemanth Sampath
发明人： Sameer Vermani , Santosh P. Abraham , Mohammad Hossein Taghavi Nasrabadi , Vincent K. Jones , Hemanth Sampath
IPC分类号： H04W4/00 , H04L12/28 , H04L29/06 , H04L1/00
CPC分类号： H04L29/06163 , H04L1/0011 , H04L1/0025 , H04L1/0033 , H04L1/0039 , H04L29/0653 , H04L69/18 , H04L69/22
摘要： Systems and methods for communicating packets having a plurality of formats are described herein. In some aspects, a signal (SIG) field in the preamble of a packet may indicate whether an extension field, such as an extension SIG field or SIG-B field, is included in the packet. In another aspect, one or more detectors may be used to auto-detect packets formatted as one of at least two different formats based on a short training field (STF) of a received packet. In some aspects, along training field (LTF) in the preamble of a packet may indicate whether the payload is repetition coded.
摘要翻译：这里描述了用于传送具有多种格式的分组的系统和方法。在一些方面，分组的前导码中的信号（SIG）字段可以指示分组中是否包括诸如扩展SIG字段或SIG-B字段的扩展字段。在另一方面，一个或多个检测器可以用于基于接收到的分组的短训练字段（STF）来自动检测被格式化为至少两种不同格式之一的分组。在一些方面，沿着分组的前导码中的训练场（LTF）可以指示有效载荷是否被重复编码。

9. 发明授权

US08761316B2 Systems and methods for approximating log likelihood ratios in a communication system 失效
标题翻译：用于在通信系统中近似对数似然比的系统和方法
公开(公告)号：US08761316B2
公开(公告)日：2014-06-24
申请号：US12406868
申请日：2009-03-18
申请人： Raghu N. Challa , Hemanth Sampath , Sameer Vermani
发明人： Raghu N. Challa , Hemanth Sampath , Sameer Vermani
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04L1/0052
摘要： Systems and methods for computing log likelihood ratios in a communication system are described. A demodulated symbol may be received. A set of scalars may be determined based on a modulation order, a signal-to-noise ratio for the symbol, and a bit of the symbol. At least one log likelihood ratio for the bit may be approximated using a piecewise linear process based on the scalars and the symbol.
摘要翻译：描述用于计算通信系统中的对数似然比的系统和方法。可以接收解调的符号。可以基于调制阶数，符号的信噪比和符号的位来确定一组标量。可以使用基于标量和符号的分段线性处理来近似该比特的至少一个对数似然比。

10. 发明授权

US08625690B2 Systems and methods for wireless communication in sub gigahertz bands 有权
标题翻译：用于无线通信的子系统和方法
公开(公告)号：US08625690B2
公开(公告)日：2014-01-07
申请号：US13410633
申请日：2012-03-02
申请人： Mohammad Hossein Taghavi Nasrabadi , Sameer Vermani , Lin Yang , Hemanth Sampath
发明人： Mohammad Hossein Taghavi Nasrabadi , Sameer Vermani , Lin Yang , Hemanth Sampath
IPC分类号： H04K1/10
CPC分类号： H04L27/2647 , H04L5/0023 , H04L5/0053 , H04L27/2613 , H04L27/2628
摘要： Systems, methods, and devices for wireless communication. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a receiver configured to receive a wireless signal comprising a packet. At least a portion of the wireless signal is configured to be received over a bandwidth lower than or equal to 1.25 MHz. The packet is formed from at least one orthogonal frequency-division multiplexing (OFDM) symbol comprising thirty-two tones. The thirty-two tones correspond to frequency subcarriers within the bandwidth. The thirty-two tones of the at least one OFDM symbol are allocated as: twenty-four data tones, two pilot tones, five guard tones, and one direct current (DC) tone. The apparatus includes a processor configured to evaluate the wireless signal. The processor includes a transform module configured to convert the at least one OFDM symbol into a frequency domain signal using a thirty-two point mode.
摘要翻译：用于无线通信的系统，方法和设备。一方面，提供一种无线通信装置。该装置包括被配置为接收包括分组的无线信号的接收机。无线信号的至少一部分被配置为在低于或等于1.25MHz的带宽上接收。分组由包括三十二个音调的至少一个正交频分复用（OFDM）符号形成。 32个音调对应于带宽内的频率子载波。至少一个OFDM符号的三十二个音调被分配为：二十四个数据音调，两个导频音调，五个保护音调和一个直流（DC）音调。该装置包括被配置为评估无线信号的处理器。处理器包括变换模块，其被配置为使用三十二点模式将至少一个OFDM符号转换成频域信号。

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