公开(公告)号：US08542753B1

公开(公告)日：2013-09-24

申请号：US13612276

申请日：2012-09-12

申请人： Jungwon Lee ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H04L25/08

CPC分类号： H04L1/0036 ,  H04L25/03305 ,  H04L2025/03726

摘要： Techniques are provided for detecting a coded signal in the presence of interference. In an embodiment, a primary transmitter corresponds to a desired transmitter, and one or more secondary transmitters correspond to interfering transmitters. Received symbols, which include interference and additive noise, are filtered to recover a set of original message bits. An estimate of the set of original message bits may be determined using an ordered successive interference cancellation (SIC) decoder that uses either a SIC detector or an AWGN-based detector, depending on the signal-to-interference ratio at a primary receiver.

摘要翻译： 提供了用于在存在干扰的情况下检测编码信号的技术。 在一个实施例中，主发射机对应于期望的发射机，并且一个或多个次发射机对应于干扰发射机。 接收到的包括干扰和加性噪声的符号被过滤以恢复一组原始消息位。 可以使用使用SIC检测器或基于AWGN的检测器的有序连续干扰消除（SIC）解码器来确定原始消息比特组的估计，这取决于主接收机处的信号干扰比。

公开(公告)号：US08539288B1

公开(公告)日：2013-09-17

申请号：US13165832

申请日：2011-06-22

申请人： Yakun Sun ,  Jungwon Lee

发明人： Yakun Sun ,  Jungwon Lee

IPC分类号： G08C25/02

CPC分类号： H04B7/0456 ,  H04B1/10 ,  H04B7/0413 ,  H04J11/004 ,  H04L1/0048 ,  H04L25/03305

摘要： Systems and methods are provided for determining a successive interference cancellation (SIC) decoding ordering in a multiple input multiple output transmission (MIMO) system with retransmissions. A plurality of codewords is transmitted in a current transmission time. Some of the codewords may have been previously transmitted in previous transmission attempts according to a retransmission protocol. The plurality of codewords is received and an ordering metric is computed for a received codeword based on channels associated with multiple transmission attempts of the codeword. A decoding ordering of the codewords is determined based on the computed ordering metric. Performance parameters such as Packet Error Rate (PER), channel gain, and/or equalizer-output Signal-to-Interference and Noise Ratio (SINR) may be used to evaluate a channel quality for each one of the transmission attempts of the codeword. The ordering metric may be updated recursively with each transmission attempt.

摘要翻译： 提供了用于在具有重发的多输入多输出传输（MIMO）系统中确定连续干扰消除（SIC）解码排序的系统和方法。 在当前传输时间内发送多个码字。 根据重传协议，先前的传输尝试中可能已经先前传送了一些码字。 接收多个码字，并且基于与码字的多个发送尝试相关联的信道对接收到的码字计算排序度量。 基于所计算的排序度量来确定码字的解码排序。 可以使用诸如分组差错率（PER），信道增益和/或均衡器输出信号与干扰和噪声比（SINR）的性能参数来评估码字的每个传输尝试的信道质量。 每个传输尝试可以递归地更新排序度量。

公开(公告)号：US08516353B2

公开(公告)日：2013-08-20

申请号：US13605099

申请日：2012-09-06

申请人： Jungwon Lee ,  Yakun Sun ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Yakun Sun ,  Hui-Ling Lou

IPC分类号： H03M13/00

CPC分类号： H04B7/024 ,  H04B7/0413 ,  H04L1/0042 ,  H04L1/0068 ,  H04L1/0643 ,  H04L1/1819

摘要： Techniques are provided for transmitting and receiving a mother code in an incremental redundancy hybrid automatic repeat-request protocol. Each bit position of the mother code may be mapped to an output symbol, and each output symbol may be mapped to an antenna for transmission. One or more transmissions of symbols contained in the output symbols may be performed, where each transmission may include puncturing the mother code by selecting one or more symbols from the of output symbols, and transmitting each symbol in the one or more symbols on an antenna corresponding to that symbol. The mother code may be decoded, in part, by determining combinable bits contained within a set of received symbols, and computing one or more log-likelihood ratio values corresponding to each symbol in the set of received symbols.

摘要翻译： 提供了用于以增量冗余混合自动重复请求协议发送和接收母码的技术。 母码的每个比特位置可以被映射到输出符号，并且每个输出符号可以被映射到天线以进行传输。 可以执行输出符号中包含的符号的一个或多个传输，其中每个传输可以包括通过从输出符号中选择一个或多个符号来对母码进行穿刺，并且在天线上的一个或多个符号中发送每个符号 到那个符号。 可以部分地通过确定包含在一组接收到的符号内的可组合比特，以及计算与所接收的符号集合中的每个符号相对应的一个或多个对数似然比值来对母码进行解码。

公开(公告)号：US20130196670A1

公开(公告)日：2013-08-01

申请号：US13360547

申请日：2012-01-27

申请人： Sungsoo Kim ,  Inyup Kang ,  Jungwon Lee

发明人： Sungsoo Kim ,  Inyup Kang ,  Jungwon Lee

IPC分类号： H04W36/00

CPC分类号： H04W36/32 ,  G01S11/06 ,  H04W36/0083 ,  H04W64/006

摘要： A method of operation of a mobile communication system includes: receiving a base carrier frequency signal from a cell tower location; generating a power spectral density from the base carrier frequency signal; measuring a Rician K factor from the power spectral density; estimating a line-of-sight Doppler frequency based on the base carrier frequency signal; determining the cell tower location based on the Rician K factor; and activating a handover decision handler based on the cell tower location.

摘要翻译： 移动通信系统的操作方法包括：从小区塔位置接收基载波频率信号; 从所述基本载波频率信号产生功率谱密度; 从功率谱密度测量Rician K因子; 基于所述基本载波频率信号估计视线多普勒频率; 基于Rician K因子确定细胞塔位置; 以及基于所述小区塔位置激活切换判定处理器。

公开(公告)号：US08498637B1

公开(公告)日：2013-07-30

申请号：US13596536

申请日：2012-08-28

申请人： Jungwon Lee

发明人： Jungwon Lee

IPC分类号： G06F15/16

CPC分类号： H04J11/005 ,  H04B7/024 ,  H04B7/0404 ,  H04B7/0854 ,  H04L5/0032 ,  H04L5/0048 ,  H04W24/08 ,  H04W24/10

摘要： A mobile station including an input and a channel estimation module. The input is configured to receive a first signal from a first base station with which the mobile station is associated. The first signal has a first channel gain and is transmitted by the first base station using a plurality of pilot values. The input is configured to receive a second signal from a second base station with which the mobile station is not associated. The second signal has a second channel gain and is transmitted by the second base station using the plurality of pilot values. The channel estimation module is configured to generate, based on the plurality of pilot values, i) estimates of the first channel gain, and ii) estimates of the second channel gain.

摘要翻译： 一种包括输入和信道估计模块的移动站。 所述输入被配置为从所述移动台与之相关联的第一基站接收第一信号。 第一信号具有第一信道增益，并且由第一基站使用多个导频值发送。 所述输入被配置为从所述移动站不与之相关联的第二基站接收第二信号。 第二信号具有第二信道增益，并且由第二基站使用多个导频值发送。 信道估计模块被配置为基于多个导频值来生成i）第一信道增益的估计，以及ii）第二信道增益的估计。

公开(公告)号：US08472381B1

公开(公告)日：2013-06-25

申请号：US12856421

申请日：2010-08-13

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

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

IPC分类号： H04W4/00

CPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04B7/0608 ,  H04B7/0617 ,  H04B7/0671 ,  H04B7/12 ,  H04L25/0242 ,  H04L25/03898 ,  H04L25/03949 ,  H04L49/101

摘要： In a method for utilizing beamforming in a wireless communication system, reference signals corresponding to a first communication channel from a first communication device to a second communication device are received, and an estimate of the first communication channel is generated using the received reference signals. One or more transmit beamforming vectors are calculated using the estimate of the first communication channel, and the one or more transmit beamforming vectors are utilized to transmit signals via a second communication channel from the second communication device to the first communication device while the first communication device assumes that the first second communication device is not utilizing beamforming.

摘要翻译： 在无线通信系统中利用波束形成的方法中，接收对应于从第一通信设备到第二通信设备的第一通信信道的参考信号，并且使用所接收的参考信号来生成第一通信信道的估计。 使用第一通信信道的估计来计算一个或多个发射波束形成向量，并且利用一个或多个发射波束成形向量将信号经由第二通信信道从第二通信设备传输到第一通信设备，同时第一通信设备 假设第一第二通信设备不使用波束形成。

公开(公告)号：US20130150053A1

公开(公告)日：2013-06-13

申请号：US13315275

申请日：2011-12-08

申请人： Insoo Hwang ,  Jungwon Lee ,  Heejin Roh ,  Inyup Kang

发明人： Insoo Hwang ,  Jungwon Lee ,  Heejin Roh ,  Inyup Kang

IPC分类号： H04W36/00 ,  H04W36/34

CPC分类号： H04W36/0083

摘要： A method of operation of a communication system includes: estimating a channel; calculating a predicted signal within the channel; evaluating a prediction accuracy of the predicted signal; and adjusting a handoff parameter when the prediction accuracy of the predicted signal is within a threshold range for communicating through a mobile station.

摘要翻译： 通信系统的操作方法包括：估计信道; 计算信道内的预测信号; 评估预测信号的预测精度; 以及当所述预测信号的预测精度在用于通过移动台进行通信的阈值范围内时，调整切换参数。

公开(公告)号：US08411805B1

公开(公告)日：2013-04-02

申请号：US12169986

申请日：2008-07-09

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： H04L27/06

CPC分类号： H04W24/02 ,  H04L25/0224 ,  H04L25/0244 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2675 ,  H04L27/2695

摘要： A mobile station (MS) includes an estimation module, a filter module, and a filter selection module. The estimation module receives an input signal having subcarriers and generates first channel estimates based on the input signal. The subcarriers are selectively used by a base station (BS) to transmit preamble sequences when communicating with the MS. The filter module includes first and second filters. One of the first and second filters selectively filters the first channel estimates and generates second channel estimates. The filter selection module selects the one of the first and second filters based on a number of the subcarriers used to transmit the preamble sequences.

摘要翻译： 移动台（MS）包括估计模块，滤波器模块和滤波器选择模块。 估计模块接收具有子载波的输入信号，并且基于输入信号产生第一信道估计。 当与MS通信时，子载波由基站（BS）选择性地使用来发送前导码序列。 过滤器模块包括第一和第二过滤器。 第一和第二滤波器之一选择性地滤波第一信道估计并产生第二信道估计。 滤波器选择模块基于用于发送前导码序列的子载波的数量来选择第一和第二滤波器中的一个。

公开(公告)号：US08411778B1

公开(公告)日：2013-04-02

申请号：US11834466

申请日：2007-08-06

申请人： Jungwon Lee ,  Hui-Ling Lou ,  Woong Jun Jang

发明人： Jungwon Lee ,  Hui-Ling Lou ,  Woong Jun Jang

IPC分类号： H04B7/02

CPC分类号： H04L25/067 ,  H04L1/08 ,  H04L1/1816 ,  H04L1/1845 ,  H04L2025/03426

摘要： Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors based on the same transmitted vector. The symbols of the received signal vectors are combined, forming a combined received signal vector that may be treated as a single received signal vector. The combined received signal vector may be equalized by, for example, a zero-forcing or minimum-mean-squared error equalizer or another suitable linear equalizer. Following equalization, the equalized signal vector may be decoded using a simple, linear decoder.

摘要翻译： 提供了用于对多输入多输出（MIMO）系统中的信号向量进行解码的系统和方法，其中接收机已经基于相同的传输向量接收了一个或多个信号向量。 组合接收信号矢量的符号，形成可被视为单个接收信号矢量的组合接收信号矢量。 组合的接收信号矢量可以通过例如零强制或最小均方误差均衡器或另一适当的线性均衡器来均衡。 在均衡之后，可以使用简单的线性解码器来解码均衡信号向量。

公开(公告)号：US08355677B1

公开(公告)日：2013-01-15

申请号：US13482534

申请日：2012-05-29

申请人： Jungwon Lee

发明人： Jungwon Lee

IPC分类号： H04B1/00

CPC分类号： H04L27/0012 ,  H04L1/0003 ,  H04L1/0009 ,  H04L25/08 ,  H04L27/3405

摘要： A wireless device comprises an interference sensing module, a modulation and coding schemes (MCS) selection module, and a transmit module. The interference sensing module selectively receives an interference signal over a channel. The interference signal is modulated using P MCSs, where P is an integer greater than or equal to 1. The MCS selection module selects an MCS based on the P MCSs. The transmit module transmits a transmit signal over the channel using the MCS.

摘要翻译： 无线设备包括干扰感测模块，调制和编码方案（MCS）选择模块和发射模块。 干扰感测模块通过信道选择性地接收干扰信号。 使用P MCS调制干扰信号，其中P是大于或等于1的整数。MCS选择模块基于P MCS选择MCS。 发射模块使用MCS通过信道发送发射信号。