公开(公告)号：US08121085B1

公开(公告)日：2012-02-21

申请号：US12118525

申请日：2008-05-09

申请人： Jungwon Lee ,  Jihwan P. Choi

发明人： Jungwon Lee ,  Jihwan P. Choi

IPC分类号： H04W16/10 ,  H04W16/22 ,  H04W24/02 ,  H04W72/04

CPC分类号： H04W72/0446 ,  H04W16/14 ,  H04W28/22 ,  H04W48/16

摘要： Communication between a base station and remote stations is partitioned into frames, each including a first frequency reuse zone having a number of slots. Slots are allocated by assigning a first data rate to each remote station for communication using the first frequency reuse zone. Each remote station is assigned a respective slot allocation comprising a first number of slots of the first frequency reuse zone and has a weighted data rate dependent on the first data rate and the respective slot allocation. The slot allocations are determined so as to maximize the minimum of the weighted data rates of the remote stations. Slots may be allocated using a data rate assigner to assign a first data rate to each remote station for communication using slots of the first frequency reuse zone, and using a slot allocation provider to provide a respective slot allocation for each remote station.

摘要翻译： 基站和远程站之间的通信被划分为帧，每个帧包括具有多个时隙的第一频率重用区。 通过向每个远程站分配第一数据速率以便使用第一频率重用区进行通信来分配时隙。 为每个远程站分配包括第一频率重用区的第一数量的时隙的相应时隙分配，并具有取决于第一数据速率和相应时隙分配的加权数据速率。 确定时隙分配以最大化远程站的加权数据速率的最小值。 可以使用数据速率分配器来分配时隙，以将第一数据速率分配给每个远程站，以便使用第一频率重用区的时隙进行通信，并且使用时隙分配提供者为每个远程站提供相应的时隙分配。

公开(公告)号：US08867635B1

公开(公告)日：2014-10-21

申请号：US13323781

申请日：2011-12-12

申请人： Jungwon Lee ,  Rohit U. Nabar ,  Jihwan P. Choi ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Rohit U. Nabar ,  Jihwan P. Choi ,  Hui-Ling Lou

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04B7/0682 ,  H04B7/0413 ,  H04B7/0465

摘要： A method for determining a phase of each of a plurality of transmitting antennas in a multiple input and multiple output (MIMO) communication system includes: calculating, for first and second ones of the plurality of transmitting antennas, a value based on first and second groups of channel gains, the first group including channel gains between the first transmitting antenna and each of a plurality of receiving antennas, the second group including channel gains between the second transmitting antenna and each of the plurality of receiving antennas; and determining the phase of each of the plurality of transmitting antennas based on at least the value.

摘要翻译： 一种用于确定多输入多输出（MIMO）通信系统中的多个发射天线中的每一个的相位的方法，包括：针对所述多个发射天线中的第一和第二发射天线的第一和第二发射天线，基于第一和第二组 所述第一组包括所述第一发射天线与所述多个接收天线中的每一个之间的信道增益，所述第二组包括所述第二发射天线与所述多个接收天线中的每一个之间的信道增益; 以及至少基于所述值确定所述多个发射天线中的每一个的相位。

公开(公告)号：US08761302B1

公开(公告)日：2014-06-24

申请号：US13902961

申请日：2013-05-27

申请人： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yakun Sun

发明人： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yakun Sun

IPC分类号： H04L27/00

CPC分类号： H04L27/2627 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0671 ,  H04L1/0625 ,  H04L5/0023 ,  H04L5/0087 ,  H04L25/0204 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03426

摘要： A plurality of diagonal matrices Ci is determined, where the plurality of diagonal matrices Ci is for modifying a plurality of transmit signals to be transmitted via a plurality of transmit antennas, each diagonal matrix Ci for modifying an i-th block of sub-carriers, adjacent in frequency, in the plurality of transmit signals. The plurality of diagonal matrices Ci is used to modify the plurality of transmit signals to implement transmit diversity.

摘要翻译： 确定多个对角矩阵Ci，其中多个对角矩阵Ci用于修改要经由多个发射天线发射的多个发射信号，用于修改第i个子载波块的每个对角矩阵Ci， 频率相邻的多个发送信号。 多个对角矩阵Ci用于修改多个发射信号以实现发射分集。

公开(公告)号：US08681888B1

公开(公告)日：2014-03-25

申请号：US13619523

申请日：2012-09-14

申请人： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou

IPC分类号： H04L27/28

CPC分类号： H04L1/0019 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/203 ,  H04L5/0007 ,  H04L5/0046 ,  H04W24/08

摘要： A method includes determining one or more metrics indicative of at least one of (i) interference on a communication link, (ii) noise on the communication link, and (iii) performance of a receiver receiving packets via the communication link, selecting a modulation and coding scheme as a function of (i) the determined one or more metrics, and (ii) one or more Quality of Service requirements for the communication link, and correcting the selected modulation and coding scheme using a current value of a correction factor. The corrected modulation and coding scheme is to be used to generate one or more packets. The method also includes determining an error rate corresponding to packets previously transmitted over the communication link, and adjusting the correction factor based on the determined error rate. Adjusting the correction factor includes incrementing or decrementing the correction factor.

摘要翻译： 一种方法包括确定一个或多个度量，其指示以下中的至少一个：（i）通信链路上的干扰，（ii）通信链路上的噪声，以及（iii）经由通信链路接收分组的接收机的性能，选择调制 以及作为（i）确定的一个或多个度量的函数的编码方案，以及（ii）通信链路的一个或多个服务质量要求，以及使用校正因子的当前值来校正所选择的调制和编码方案。 校正的调制和编码方案将用于生成一个或多个分组。 该方法还包括确定对应于先前通过通信链路发送的分组的错误率，以及基于所确定的错误率来调整校正因子。 调整校正因子包括增加或减少校正因子。

公开(公告)号：US08625694B1

公开(公告)日：2014-01-07

申请号：US12938718

申请日：2010-11-03

申请人： Jungwon Lee ,  Jihwan P. Choi

发明人： Jungwon Lee ,  Jihwan P. Choi

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04L27/3405 ,  H04L1/0048 ,  H04L1/0054 ,  H04L27/38

摘要： Systems and techniques relating to wireless communications are described. A described technique includes receiving a signal that represents concurrent wireless data communications, where the signal is based on superimposed signals modulated using different respective constellations; detecting a first signal from the received signal over a first combined constellation, the combined constellation being based on the respective constellations; modifying the received signal based on the first detected signal to remove a signal contribution associated with the first detected signal; and detecting a second signal from the modified received signal over a second constellation. The second constellation can be based on the respective constellations absent a constellation of the respective constellations that is associated with the first detected signal.

摘要翻译： 描述与无线通信相关的系统和技术。 所描述的技术包括接收表示并发无线数据通信的信号，其中信号基于使用不同的相应星座调制的叠加信号; 通过第一组合星座从接收到的信号中检测第一信号，所述组合星座基于相应的星座; 基于所述第一检测信号修改接收信号以去除与所述第一检测信号相关联的信号贡献; 以及通过第二星座从所述修改的接收信号中检测第二信号。 第二星座可以基于不存在与第一检测信号相关联的相应星座的星座的相应星座。

公开(公告)号：US08077785B1

公开(公告)日：2011-12-13

申请号：US12098924

申请日：2008-04-07

申请人： Jungwon Lee ,  Rohit U. Nabar ,  Jihwan P. Choi ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Rohit U. Nabar ,  Jihwan P. Choi ,  Hui-Ling Lou

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04B7/0682 ,  H04B7/0413 ,  H04B7/0465

摘要： A method for determining a phase of each of a plurality of transmitting antennas in a multiple input and multiple output (MIMO) communication system includes: calculating, for first and second ones of the plurality of transmitting antennas, a value based on first and second groups of channel gains, the first group including channel gains between the first transmitting antenna and each of a plurality of receiving antennas, the second group including channel gains between the second transmitting antenna and each of the plurality of receiving antennas; and determining the phase of each of the plurality of transmitting antennas based on at least the value.

摘要翻译： 一种用于确定多输入多输出（MIMO）通信系统中的多个发射天线中的每一个的相位的方法，包括：针对所述多个发射天线中的第一和第二发射天线的第一和第二发射天线，基于第一和第二组 所述第一组包括所述第一发射天线与所述多个接收天线中的每一个之间的信道增益，所述第二组包括所述第二发射天线与所述多个接收天线中的每一个之间的信道增益; 以及至少基于所述值确定所述多个发射天线中的每一个的相位。

公开(公告)号：US07782751B1

公开(公告)日：2010-08-24

申请号：US12176976

申请日：2008-07-21

申请人： Jungwon Lee ,  Jiwoong Choi ,  Jihwan P. Choi

发明人： Jungwon Lee ,  Jiwoong Choi ,  Jihwan P. Choi

IPC分类号： H04J11/00 ,  H04J3/06

CPC分类号： H04W40/38 ,  H04J11/0063 ,  H04L25/0202 ,  H04L27/2601

摘要： Systems and methods are provided for computing a relative path delay between multiple transmitting source to select a source that is closest to a receiving device. Preamble sequences unique to each source are received by a receiving device. The receiving devices determines based on a channel estimation or differential algorithm which transmitting source is closer to the receiving device. The channel estimation algorithm computes the path delay based on a channel estimation correlation at different preamble sequence indices. The differential algorithm computes the path delay based on a correlation between the received and transmitted preamble sequences at different preamble sequence indices. The receiving device selects the closer of the multiple sources to be the source from which to extract data.

摘要翻译： 提供的系统和方法用于计算多个发送源之间的相对路径延迟，以选择最接近接收设备的源。 每个源独有的前导序列由接收设备接收。 接收装置基于信道估计或差分算法确定发射源更靠近接收装置。 信道估计算法基于在不同前同步码序列索引处的信道估计相关性来计算路径延迟。 差分算法基于在不同前同步码序列索引处的接收和发送前同步码序列之间的相关性来计算路径延迟。 接收设备选择要从中提取数据的源的更多的源。

公开(公告)号：US08818425B1

公开(公告)日：2014-08-26

申请号：US12917117

申请日：2010-11-01

申请人： Jihwan P. Choi ,  Jungwon Lee

发明人： Jihwan P. Choi ,  Jungwon Lee

IPC分类号： H04W68/00

CPC分类号： H04W68/005 ,  H04W52/0216 ,  H04W52/0219 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/146

摘要： Apparatus having corresponding methods and computer-readable media comprise: a paging module configured to provide paging parameters for a mobile station, wherein the paging parameters include i) a paging listening interval length Lp for each paging listening interval, ii) a paging cycle period Pp, and iii) a paging cycle offset Qp; and a sleep module configured to determine sleep parameters for the mobile station based on the paging parameters, wherein the sleep parameters include i) a wakeup interval length Ls for each wakeup interval, ii) a sleep cycle period Ps, and iii) a sleep cycle offset Qs; and wherein the sleep module is further configured to determine the sleep parameters such that each paging listening interval overlaps one of the wakeup intervals.

摘要翻译： 具有相应方法和计算机可读介质的装置包括：寻呼模块，被配置为提供移动台的寻呼参数，其中寻呼参数包括i）每个寻呼监听间隔的寻呼监听间隔长度Lp，ii）寻呼周期Pp ，和iii）寻呼周期偏移量Qp; 睡眠模块，被配置为基于所述寻呼参数来确定所述移动站的睡眠参数，其中所述睡眠参数包括i）每个唤醒间隔的唤醒间隔长度Ls，ii）睡眠周期周期Ps，以及iii）睡眠周期 偏移Qs; 并且其中所述睡眠模块还被配置为确定所述睡眠参数，使得每个寻呼监听间隔与所述唤醒间隔之一重叠。

公开(公告)号：US08730851B1

公开(公告)日：2014-05-20

申请号：US13564346

申请日：2012-08-01

申请人： Jihwan P. Choi ,  Jungwon Lee

发明人： Jihwan P. Choi ,  Jungwon Lee

IPC分类号： H04J1/00

CPC分类号： H04L5/16 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0064

摘要： A base station is configured to assign, to each remote station, a down-link data rate and an up-link data rate for communication between that remote station and the base station, provide, for each remote station, a down-link slot allocation for communication between that remote station and the base station, and provide, for each remote station, an up-link slot allocation for communication between that remote station and the at least one base station. A minimum down-link data rate varies with the down-link slot allocation for each remote station, and a minimum up-link data rate varies with the respective up-link slot allocation for each remote station. The down-link slot allocations and the up-link slot allocations are determined so as to maximize the minimum of the down-link data rates and the up-link data rates.

摘要翻译： 基站被配置为向每个远程站分配用于该远程站和基站之间的通信的下行链路数据速率和上行链路数据速率，为每个远程站提供下行链路时隙分配 用于该远程站与基站之间的通信，并且为每个远程站提供用于该远程站与该至少一个基站之间的通信的上行链路时隙分配。 最小下行链路数据速率随着每个远程站的下行链路时隙分配而变化，并且最小上行链路数据速率随每个远程站的相应上行链路时隙分配而变化。 确定下行链路时隙分配和上行链路时隙分配，以便最大化下行链路数据速率和上行链路数据速率的最小值。

公开(公告)号：US08705460B1

公开(公告)日：2014-04-22

申请号：US12573473

申请日：2009-10-05

申请人： Jihwan P. Choi ,  Jungwon Lee

发明人： Jihwan P. Choi ,  Jungwon Lee

IPC分类号： H04W4/00 ,  H04B7/00

CPC分类号： H04L5/0044 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/1829 ,  H04L5/0037

摘要： Communication circuitry that employs persistent scheduling conventionally uses one initiation command to establish the modulation and coding scheme (“MCS”) that will be used for transmission of subsequent payload bursts, at least until it is time to send another initiation command. Inefficiency can result if transmission channel conditions change between initiation commands. To avoid such inefficiency, the disclosed circuitry maintains a count of unsuccessful transmission attempts. When the count deviates from a predetermined reference standard, the circuitry automatically and autonomously makes an appropriate change in the MCS selection without waiting for the next initiation command. Both transmitter and receiver circuits independently operate in the same way at the same time so that both ends of a communication link remain coordinated with one another.

摘要翻译： 采用持续调度的通信电路通常使用一个启动命令建立将用于后续有效载荷突发的传输的调制和编码方案（“MCS”），至少直到发送另一个启动命令为止。 如果传输通道条件在启动命令之间变化，则可能导致低效率。 为了避免这种低效率，所公开的电路保持不成功传输尝试的计数。 当计数偏离预定的参考标准时，电路自动并自主地进行MCS选择的适当改变，而不等待下一个启动命令。 发射机和接收机电路在相同的方式独立地以相同的方式操作，使得通信链路的两端保持彼此协调。