公开(公告)号：US20100111231A1

公开(公告)日：2010-05-06

申请号：US12265220

申请日：2008-11-05

申请人： Havish Koorapaty ,  Jiann-Ching Guey

发明人： Havish Koorapaty ,  Jiann-Ching Guey

IPC分类号： H04L27/06 ,  H04L27/28

CPC分类号： H04L5/0048 ,  H04L25/0226 ,  H04L25/0232

摘要： Smaller patterns of regularly-spaced pilot symbols are discerned from a larger pattern of irregularly-spaced pilot symbols transmitted in the time-frequency domain. Accordingly, the irregularly-spaced pilot symbols can be partitioned into at least two different groups of regularly-spaced pilot symbols in the time-frequency domain. Each group of regularly-spaced pilot symbols is individually processed with lower complexity and the results combined to generate an accurate time-frequency channel response estimate. According to an embodiment, a set of irregularly-spaced pilot symbols is transmitted over a time-frequency window. Channel response is estimated based on the pilot symbols by grouping the pilot symbols into subsets of regularly-spaced pilot symbols. An intermediate quantity is generated for each subset of regularly-spaced pilot symbols as a function of the pilot symbols included in the subset. The channel response is estimated over the time-frequency window as a function of the intermediate quantities.

摘要翻译： 从时频域中发送的不规则间隔的导频符号的较大模式可以看出较小的规则间隔导频符号模式。 因此，不规则间隔的导频符号可以被划分成时频域中的至少两个不同的规则间隔的导频符号组。 每组规则间隔的导频符号以较低的复杂度进行单独处理，并且结果组合以产生准确的时频信道响应估计。 根据实施例，在时间 - 频率窗口上发送一组不规则间隔的导频符号。 通过将导频符号分组成规则间隔的导频符号的子集，基于导频符号来估计信道响应。 根据包括在该子集中的导频符号的函数，为规则间隔的导频符号的每个子集生成中间量。 在时间 - 频率窗口上估计信道响应作为中间量的函数。

公开(公告)号：US20090292780A1

公开(公告)日：2009-11-26

申请号：US12125472

申请日：2008-05-22

申请人： Rajaram Ramesh ,  Kumar Balachandran ,  Havish Koorapaty

发明人： Rajaram Ramesh ,  Kumar Balachandran ,  Havish Koorapaty

IPC分类号： G06F15/16

CPC分类号： G06Q10/107 ,  H04L12/185 ,  H04L51/063

摘要： A system and method of selectively utilizing a feature with an email message. The method includes processing, by a mail client within a user's computer, a single email message for a plurality of recipients. The mail client receives a designated first set of recipients of the plurality of recipients for receiving the email message with a specific feature and a designated second set of recipients of the plurality of recipients for receiving the email message without the specific feature. In addition, a copy of the email message is generated without the specific feature. The email message is then sent with the specified feature to the first set of recipients and a copy of the email message without the specified feature is sent to the second set of recipients. The specific feature may be an attachment, an encryption of the message, or any other feature associated with the email message. In another embodiment, an extension header may be applied to the header of the email message to distinguish the first set of recipients from the second set of recipients. The message may then be sent to an email server which reformats the message into two messages according to the header extensions.

摘要翻译： 一种选择性地利用电子邮件消息的特征的系统和方法。 该方法包括由用户计算机内的邮件客户端处理多个接收者的单个电子邮件消息。 邮件客户端接收多个收件人的指定的第一组收件人，用于接收具有特定特征的电子邮件消息和多个收件人的指定的第二组接收者，用于在没有特定特征的情况下接收电子邮件消息。 此外，生成电子邮件的副本而没有特定的功能。 然后将电子邮件消息与指定的功能一起发送到第一组收件人，并且没有指定功能的电子邮件的副本将发送到第二组收件人。 具体特征可以是附件，消息的加密或与电子邮件消息相关联的任何其他特征。 在另一个实施例中，可以将扩展头部应用于电子邮件消息的头部，以将第一组接收者与第二组接收者区分开。 然后可以将消息发送到电子邮件服务器，根据头部扩展将邮件重新格式化为两个消息。

公开(公告)号：US20090238151A1

公开(公告)日：2009-09-24

申请号：US12346259

申请日：2008-12-30

申请人： Rajaram Ramesh ,  Havish Koorapaty ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Havish Koorapaty ,  Kumar Balachandran

IPC分类号： H04B7/216 ,  H04W68/00

CPC分类号： H04W68/025 ,  H04W72/042 ,  H04W72/0466

摘要： In a communication system, whether different transmitting stations use the same method or different methods of assigning quick paging code words to receiving stations, the receiving stations in a paging area assume that the same quick paging code words are used by all base stations in the paging area. To enable such operation by the receiving stations in a paging area covered by several base stations, those several base stations share information about the quick paging code words assigned to the various receiving stations known to the base stations.

摘要翻译： 在通信系统中，不同的发送站是否使用与接收站分配快速寻呼码字相同的方法或不同的方法，寻呼区域中的接收站假定在寻呼中所有基站使用相同的快速寻呼码字 区。 为了在由几个基站覆盖的寻呼区域中由接收站进行这样的操作，这几个基站共享关于分配给基站已知的各种接收站的快速寻呼码字的信息。

公开(公告)号：US20090154533A1

公开(公告)日：2009-06-18

申请号：US11957522

申请日：2007-12-17

申请人： Ali S. Khayrallah ,  Havish Koorapaty

发明人： Ali S. Khayrallah ,  Havish Koorapaty

IPC分类号： H04B7/14

CPC分类号： H04B7/15592

摘要： Communications between a base station and a mobile station is improved through using a relay station. A transmit timing of relayed signals from the relay station is controlled so that the signals from the base station and the relay station arrive to the mobile station aligned with each other within a predetermined tolerance.

摘要翻译： 通过使用中继站，提高了基站与移动台之间的通信。 控制来自中继站的中继信号的发送定时，使得来自基站和中继站的信号到达移动站，并在预定的公差范围内相互对齐。

公开(公告)号：US20090077457A1

公开(公告)日：2009-03-19

申请号：US12234067

申请日：2008-09-19

申请人： Rajaram Ramesh ,  Havish Koorapaty ,  Jung-Fu Thomas Cheng ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Havish Koorapaty ,  Jung-Fu Thomas Cheng ,  Kumar Balachandran

IPC分类号： H03M13/09 ,  G06F11/08

CPC分类号： H03M13/093 ,  H03M13/09 ,  H03M13/2948 ,  H03M13/2951 ,  H03M13/2975 ,  H03M13/3753 ,  H03M13/6525 ,  H04L1/0051 ,  H04L1/0061 ,  H04L1/0083 ,  H04L1/18

摘要： The iterative decoding of blocks may be continued or terminated based on CRC checks. In an example embodiment, one iteration of an iterative decoding process is performed on a block whose information bits are covered by a CRC. The iterative decoding process is stopped if the CRC checks for a predetermined number of consecutive iterations. In another example embodiment, a decoding iteration is performed on a particular sub-block of multiple sub-blocks of a transport block, which includes a single CRC over an entirety of the transport block. The CRC is checked using decoded bits obtained from the decoding iteration on the particular sub-block and decoded bits obtained from previous decoding iterations on other sub-blocks of the multiple sub-blocks. The decoding iteration is then performed on a different sub-block if the CRC does not check. Also, the decoding iterations for the sub-blocks may be terminated if the CRC checks.

摘要翻译： 可以基于CRC校验继续或终止块的迭代解码。 在示例实施例中，对其信息比特被CRC覆盖的块执行迭代解码处理的一次迭代。 如果CRC检查预定数量的连续迭代，则停止迭代解码过程。 在另一个示例实施例中，对传输块的多个子块的特定子块执行解码迭代，其在整个传输块上包括单个CRC。 使用从特定子块上的解码迭代获得的解码比特和在多个子块的其他子块上从先前的解码迭代获得的解码比特来校验CRC。 如果CRC不检查，则在不同的子块上执行解码迭代。 此外，如果CRC校验，则可以终止子块的解码迭代。

公开(公告)号：US20080299963A1

公开(公告)日：2008-12-04

申请号：US11757650

申请日：2007-06-04

申请人： Kumar Balachandran ,  Rajaram Ramesh ,  Havish Koorapaty

发明人： Kumar Balachandran ,  Rajaram Ramesh ,  Havish Koorapaty

IPC分类号： H04Q7/20

CPC分类号： H04W28/02 ,  G10L19/24 ,  H04L47/10 ,  H04L47/11 ,  H04L47/12 ,  H04L47/14 ,  H04L47/25 ,  H04L47/38

摘要： A mobile terminal in a wireless communication network detects congestion and lowers its vocoder source rate in response, to help alleviate the congestion. The mobile terminal may detect the congestion in a variety of ways. The mobile terminal may monitor bandwidth allocation in the network, such as by inspecting the UL-MAP and DL-MAP of an IEEE 802.16 OFDM Physical Layer Frame header, for symmetric allocations. Congestion may be defined by the number of symmetric allocations exceeding a threshold. The congestion threshold may be programmed into the mobile terminal, or may be transmitted by the network. The mobile terminal may infer congestion by being repeatedly granted less bandwidth than requested. The network my explicitly indicate congestion, in a MAC message or by setting a congestion flag in one or more voice data frames. The congestion flag may comprise a reserved encoding of the AMR header Frame Type field.

摘要翻译： 无线通信网络中的移动终端检测到拥塞并降低其声码器源速率，以帮助减轻拥塞。 移动终端可以以各种方式检测拥塞。 移动终端可以监视网络中的带宽分配，例如通过检查用于对称分配的IEEE 802.16 OFDM物理层帧报头的UL-MAP和DL-MAP。 拥塞可以由超过阈值的对称分配的数量来定义。 拥塞阈值可以被编程到移动终端中，或者可以由网络发送。 移动终端可以通过重复地获得比请求更少的带宽来推断拥塞。 网络我明确地指示在MAC消息中的拥塞，或通过在一个或多个语音数据帧中设置拥塞标志。 拥塞标志可以包括AMR头帧类型字段的保留编码。

公开(公告)号：US07376192B2

公开(公告)日：2008-05-20

申请号：US10897250

申请日：2004-07-22

申请人： Havish Koorapaty ,  Rajaram Ramesh ,  Leonid Krasny

发明人： Havish Koorapaty ,  Rajaram Ramesh ,  Leonid Krasny

IPC分类号： H04L27/00

CPC分类号： H04B7/0626 ,  H04B7/0641 ,  H04L25/0214 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03802

摘要： A method is described herein for reducing the number of feedback bits needed to send channel state information over a feedback channel from a receiving unit (e.g., mobile terminal, base station) to a transmitter unit (e.g., base station, mobile terminal) in a wireless communication system. In the embodiment, the receiver unit is capable of performing the following steps: (1) receiving a pilot signal from a transmit antenna located at a transmitter unit; (2) analyzing a channel tap associated with the transmit antenna and exploiting the temporal correlations of the channel tap to generate the following (i) a delta-modulated feedback bit indicative of a real part of a complex coefficient of the channel tap associated with the transmit antenna and (ii) a delta-modulated feedback bit indicative of an imaginary part of the complex coefficient of the channel tap associated with the transmit antenna; and (3) sending the two feedback bits over a feedback channel to the transmitter unit which analyzes the two feedback bits, and other feedback bits corresponding to other channel taps of this and other transmit antennas, to optimize the subsequent transmission of data to the receiver unit.

摘要翻译： 本文描述了一种用于减少在反馈信道上从在接收单元（例如，移动终端，基站）到发射机单元（例如，基站，移动终端）中的发送单元（例如，基站，移动终端）发送信道状态信息所需的反馈比特数的方法 无线通信系统。 在实施例中，接收机单元能够执行以下步骤：（1）从位于发射机单元的发射天线接收导频信号; （2）分析与发射天线相关联的信道抽头并利用信道抽头的时间相关性来生成以下（i）增量调制反馈比特，其表示与该信道抽头相关联的信道抽头的复系数的实部 发射天线和（ii）指示与发射天线相关联的信道分支的复系数的虚部的Δ调制反馈比特; 和（3）通过反馈信道将两个反馈比特发送到分析两个反馈比特的发射机单元以及对应于该和其它发射天线的其它信道抽头的其它反馈比特，以优化随后向接收机发送数据 单元。

公开(公告)号：US20060029031A1

公开(公告)日：2006-02-09

申请号：US11008066

申请日：2004-12-09

申请人： Havish Koorapaty

发明人： Havish Koorapaty

IPC分类号： H04B7/212 ,  H04J3/06

CPC分类号： H04W56/0045 ,  H04J3/0682

摘要： A method and mobile station (MS) for synchronizing radio signal transmission times in a radiotelephone network. The MS measures a frame reception time for an nth frame, and obtains information regarding an offset between the times of transmission and reception of the nth frame. The MS then calculates a transmission time at the mobile station for the nth data frame using the timing offset information and the measured frame reception time. For a later mth frame, if new timing offset information has been received, the MS calculates a transmission time for the mth frame using the new information and the measured reception time for the mth frame. If new information has not been received, the MS calculates the transmission time based on the difference between the reception times of the nth and mth frames, the number of frames between the nth and mth frames, and the timing offset information obtained at the nth frame.

摘要翻译： 一种用于在无线电话网络中同步无线电信号传输时间的方法和移动站（MS）。 MS测量第n帧的帧接收时间，并且获得关于第n帧的发送和接收时间之间的偏移的信息。 然后，MS使用定时偏移信息和测量的帧接收时间来计算第n个数据帧在移动站处的传输时间。 对于后来的第m帧，如果已经接收到新的定时偏移信息，则MS使用新信息和第m帧的测量的接收时间来计算第m帧的传输时间。 如果尚未接收到新的信息，则MS基于第n个和第m个帧的接收时间之间的差异，第n个和第m个帧之间的帧数以及在第n帧获得的定时偏移信息来计算传输时间 。

公开(公告)号：US06937865B1

公开(公告)日：2005-08-30

申请号：US09660519

申请日：2000-09-12

申请人： Leland S. Bloebaum ,  Havish Koorapaty

发明人： Leland S. Bloebaum ,  Havish Koorapaty

IPC分类号： G01S1/00 ,  G01S5/00 ,  G01S19/05 ,  G01S19/06 ,  G01S19/25 ,  H04Q7/20

CPC分类号： G01S19/258 ,  G01S19/05

摘要： A wireless communications mobile terminal conserves bandwidth by determining which position detection assisting devices within a position detection system are available for use and limiting ephemeris information inquiries to only those devices that are available. To make this determination, mobile terminals are provided with an almanac of position information relating to the position detection system. Once the ephemeris information is provided to the mobile terminal, the mobile terminal may determine its location relatively quickly and with a minimal imposition on the mobile network.

摘要翻译： 无线通信移动终端通过确定位置检测系统中的哪些位置检测辅助设备可用于使用并且将星历信息查询限制于仅可用的那些设备来节省带宽。 为了做出这种确定，移动终端被提供有与位置检测系统相关的位置信息的历书。 一旦将星历信息提供给移动终端，移动终端可以相对较快地确定其位置，并且以最小的强度来确定移动网络。

公开(公告)号：US06829253B1

公开(公告)日：2004-12-07

申请号：US09723634

申请日：2000-11-28

申请人： Havish Koorapaty ,  Robert A. Zak ,  Carl B. Toot

发明人： Havish Koorapaty ,  Robert A. Zak ,  Carl B. Toot

IPC分类号： H04L708

CPC分类号： H04W56/0085 ,  H04B7/2684 ,  H04L7/042 ,  H04L7/08

摘要： Methods and systems for a transceiver to acquire synchronization to a channel in a TDMA communications system by identifying a known synchronization word in a burst received at the transceiver over the channel are provided. Pursuant to these methods and systems a first uncertainty window and a second uncertainty window are defined within a burst that is received over the channel. The transceiver may search in these uncertainty windows for the known synchronization word, where the first uncertainty window is smaller than the second uncertainty window. The first uncertainty window is first searched for the known synchronization word. It may then be determined if the known synchronization word has been located within the first uncertainty window. If it has not been, the second uncertainty window is then searched for the known synchronization word.

摘要翻译： 提供了一种用于通过识别通过信道在收发器处接收的突发中的已知同步字来获取TDMA通信系统中的信道的同步的方法和系统。 根据这些方法和系统，在通过信道接收的脉冲串内定义第一不确定性窗口和第二不确定性窗口。 收发器可以在这些不确定性窗口中搜索已知的同步字，其中第一不确定性窗口小于第二不确定性窗口。 第一个不确定窗口首先搜索已知的同步字。 然后可以确定已知的同步字是否已经位于第一不确定性窗口内。 如果没有，则搜索第二不确定性窗口以获得已知的同步字。