公开(公告)号：US08369379B2

公开(公告)日：2013-02-05

申请号：US12453685

申请日：2009-05-19

申请人： Zhenzhen Ye ,  Chunjie Duan ,  Philip Orlik ,  Jinyun Zhang

发明人： Zhenzhen Ye ,  Chunjie Duan ,  Philip Orlik ,  Jinyun Zhang

IPC分类号： H04B1/7156 ,  H04L27/28 ,  H04J4/00

CPC分类号： H04J3/0608

摘要： Synchronization methods and systems for communications over a multi-band system are presented. A synchronization technique for communications over a multi-band system includes receiving a packet of preamble symbols respectively transmitted over a sequence of frequency sub-bands according to one of a plurality of frequency hopping patterns, wherein the plurality of frequency hopping patterns are partitioned into a plurality of disjoint groups, each group having a different associated periodicity; computing, in parallel, respective autocorrelation values of the packet received in a selected frequency sub-band at a plurality of symbol delays; and selecting one of the plurality of groups of frequency hopping patterns based on the autocorrelation values at the plurality of symbol delays.

公开(公告)号：US20110194452A1

公开(公告)日：2011-08-11

申请号：US13092562

申请日：2011-04-22

申请人： Philip Orlik ,  Raymond Yim ,  Chunjie Duan ,  Jinyun Zhang

发明人： Philip Orlik ,  Raymond Yim ,  Chunjie Duan ,  Jinyun Zhang

IPC分类号： H04L12/26 ,  H04L12/56

CPC分类号： H04N19/615 ,  H04N19/105 ,  H04N19/13 ,  H04N19/46 ,  H04N19/597 ,  H04N19/61 ,  H04N19/63

摘要： A transmitter transmits data having a set of two or more priorities on subcarriers using orthogonal frequency division multiplexing (OFDM) symbols. The transmitter includes a media access (MAC) layer, wherein the MAC layer further includes a queue for storing data at each priority, a rate control block connected to each queue, and a physical (PHY) layer. The PHY layer further includes a channel coder for each priority, wherein each channel coder is connected to the corresponding queue to receive data, and to the rate control block to send coding information.

摘要翻译： 发射机使用正交频分复用（OFDM）符号在子载波上发射具有两个或更多个优先级集合的数据。 所述发射机包括媒体接入（MAC）层，其中所述MAC层还包括用于存储每个优先级的数据的队列，连接到每个队列的速率控制块以及物理（PHY）层。 PHY层还包括用于每个优先级的信道编码器，其中每个信道编码器连接到对应的队列以接收数据，并且连接到速率控制块以发送编码信息。

公开(公告)号：US20100246635A1

公开(公告)日：2010-09-30

申请号：US12385078

申请日：2009-03-30

申请人： Zhenzhen Ye ,  Chunjie Duan ,  Philip Orlik ,  Jinyun Zhang

发明人： Zhenzhen Ye ,  Chunjie Duan ,  Philip Orlik ,  Jinyun Zhang

IPC分类号： H04B1/69 ,  H04B1/10

CPC分类号： H04J11/0066 ,  H04B1/719

摘要： An exemplary method is disclosed to accurately estimate the center frequency of a narrow-band interference (NBI). The exemplary method uses multi-stage autocorrelation-function (ACF) to estimate an NBI frequency. The exemplary method allows an accurate estimation of the center frequency of NBI in an Ultra-Wideband system. A narrow band interference (NBI) estimator based on such a method allows a low complexity hardware implementation. The exemplary method estimates the frequency in multiple stages. Each stage performs an ACF operation on the received signals. The first stage gives an initial estimation and the following stages refine the estimation. The results of all stages are combined to produce the final estimation. An apparatus based on such a multi-stage narrow band interference frequency detector is also disclosed to improve the accuracy by combining various filters with the detector.

摘要翻译： 公开了一种用于精确估计窄带干扰（NBI）的中心频率的示例性方法。 该示例性方法使用多级自相关函数（ACF）来估计NBI频率。 该示例性方法允许在超宽带系统中准确估计NBI的中心频率。 基于这种方法的窄带干扰（NBI）估计器允许低复杂度的硬件实现。 该示例性方法以多个阶段估计频率。 每个级对所接收的信号执行ACF操作。 第一阶段给出初步估计，并且以下阶段改进估计。 结合所有阶段的结果进行最终估计。 还公开了一种基于这种多级窄带干扰频率检测器的装置，通过将各种滤波器与检测器组合来提高精度。

公开(公告)号：US20090296684A1

公开(公告)日：2009-12-03

申请号：US12453685

申请日：2009-05-19

申请人： Zhenzhen Ye ,  Chunjie Duan ,  Philip Orlik ,  Jinyun Zhang

发明人： Zhenzhen Ye ,  Chunjie Duan ,  Philip Orlik ,  Jinyun Zhang

IPC分类号： H04J3/06 ,  H04K1/10

CPC分类号： H04J3/0608

摘要： Synchronization methods and systems for communications over a multi-band system are presented. A synchronization technique for communications over a multi-band system includes receiving a packet of preamble symbols respectively transmitted over a sequence of frequency sub-bands according to one of a plurality of frequency hopping patterns, wherein the plurality of frequency hopping patterns are partitioned into a plurality of disjoint groups, each group having a different associated periodicity; computing, in parallel, respective autocorrelation values of the packet received in a selected frequency sub-band at a plurality of symbol delays; and selecting one of the plurality of groups of frequency hopping patterns based on the autocorrelation values at the plurality of symbol delays.

摘要翻译： 介绍了多频段系统通信的同步方法和系统。 用于通过多频带系统进行通信的同步技术包括：接收根据多个跳频模式之一分别在一系列频率子带上传送的前导符号分组，其中多个跳频模式被划分为 多个不相交组，每组具有不同的相关周期; 并行地计算在多个符号延迟时在所选择的频率子带中接收的分组的相应自相关值; 以及基于所述多个符号延迟的所述自相关值来选择所述多个组跳频模式中的一个。

公开(公告)号：US20060209924A1

公开(公告)日：2006-09-21

申请号：US11029135

申请日：2005-01-04

申请人： Andreas Molisch ,  Philip Orlik

发明人： Andreas Molisch ,  Philip Orlik

IPC分类号： H04B1/00

CPC分类号： H04B1/71637 ,  H04B1/71635 ,  H04B1/7172 ,  H04B2201/71636

摘要： A method determines a delay time between reference and data pulses in a time-hopping impulse radio system. Channel state information of a channel between two transceivers is estimated periodically. The delay time frame between the reference and data pulses is then determined according to the channel state information.

公开(公告)号：US07016405B2

公开(公告)日：2006-03-21

申请号：US10075330

申请日：2002-02-14

申请人： Jyhchau Horng ,  Jinyun Zhang ,  Philip Orlik

发明人： Jyhchau Horng ,  Jinyun Zhang ,  Philip Orlik

IPC分类号： H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC分类号： H04L25/03133

摘要： A method and system for equalizing a signal transmitted via a channel of a communications system stores an input signal received via the channel in a main buffer. A training signal portion of the received input signal is stored in a circular buffer as a circulating training signal. A mean square error of the training signal is minimized while estimating the transmitted signal, until the mean square error is less than a predetermine threshold. In this case, the input signal received via the channel is equalized directly to make decisions on symbols of the signal transmitted via the channel. During an initial stage of training, the mean square error is determined directly from the training signal, during subsequent stages of training the circulating training signal is used.

公开(公告)号：US07573933B2

公开(公告)日：2009-08-11

申请号：US11029135

申请日：2005-01-04

申请人： Andreas F. Molisch ,  Philip Orlik

发明人： Andreas F. Molisch ,  Philip Orlik

IPC分类号： H04B1/00

CPC分类号： H04B1/71637 ,  H04B1/71635 ,  H04B1/7172 ,  H04B2201/71636

摘要： A method determines a delay time between reference and data pulses in a time-hopping impulse radio system. Channel state information of a channel between two transceivers is estimated periodically. The delay time frame between the reference and data pulses is then determined according to the channel state information.

摘要翻译： 一种方法确定跳时脉冲无线电系统中的参考和数据脉冲之间的延迟时间。 周期性地估计两个收发器之间的信道的信道状态信息。 然后根据信道状态信息确定参考和数据脉冲之间的延迟时间帧。

公开(公告)号：US07555004B2

公开(公告)日：2009-06-30

申请号：US10774200

申请日：2004-02-06

申请人： Philip Orlik ,  Andreas Molisch

发明人： Philip Orlik ,  Andreas Molisch

IPC分类号： H04L12/413 ,  H04L12/28 ,  H04L12/56 ,  H04W4/00

CPC分类号： H04W74/02 ,  H04W74/08

摘要： A method communicates data between terminals in heterogeneous communications network. A coordinator broadcasts periodically a first beacon in a first signal format. The first beacon defines a start of a contention period and a start of a contention free period. The coordinator also broadcasts a second beacon in a second signal format during the contention free period. The second beacon also defines the start of the contention period and the start of the contention free period.

摘要翻译： 一种方法在异构通信网络中的终端之间传送数据。 协调器周期性地以第一信号格式广播第一信标。 第一个信标定义了竞争时段的开始和无竞争时段的开始。 协调者还在无争夺时段期间以第二信号格式广播第二信标。 第二个灯塔还定义了争用期的开始和无竞争期的开始。

公开(公告)号：US20060083333A1

公开(公告)日：2006-04-20

申请号：US10964918

申请日：2004-10-14

申请人： Philip Orlik ,  Andreas Molisch ,  Sandeep Aedudodla

发明人： Philip Orlik ,  Andreas Molisch ,  Sandeep Aedudodla

IPC分类号： H04L27/20

CPC分类号： H04B1/7176 ,  H04B1/719 ,  H04L27/18

摘要： A system incorporates TH-IR and TR-IR transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by generating a reference waveform and a data waveform of a waveform pair for each current bit. The phase of the reference waveform depends on a previous modulated bit, and a difference in phase between the reference waveform and the data waveform pair depend on the current bit.

摘要翻译： 一个系统在同一无线网络中集成了TH-IR和TR-IR收发器。 发射机通过为每个当前比特生成参考波形和波形对的数据波形来调制无线通信网络中的比特序列。 参考波形的相位取决于先前的调制位，参考波形和数据波形对之间的相位差取决于当前位。

公开(公告)号：US07023912B2

公开(公告)日：2006-04-04

申请号：US10223116

申请日：2002-08-19

申请人： Philip Orlik ,  Jinyun Zhang

发明人： Philip Orlik ,  Jinyun Zhang

IPC分类号： H04H7/30

CPC分类号： H04B10/6971

摘要： A method equalizes a received signal in an optical communications system. The received signal is passed through an analog delay line where it is tapped to generate a set of delayed copies of the received signal. In a set of analog multipliers, each delayed copy of the received signal is multiplied by a corresponding weight to generate a set of weighted signals that are then summed to produce an output signal. The output signal is thresholded and subtracted from the output signal to produce an error signal, which is periodically sampled. In a digital weight updating circuit, the weights are produced from digitized versions of the sampled error signal and samples of the delayed copies of the received signal.

摘要翻译： 一种在光通信系统中均衡接收信号的方法。 接收到的信号通过一个模拟延迟线，在该延迟线中，它被抽头以产生一组接收信号的延迟副本。 在一组模拟乘法器中，将接收信号的每个延迟副本乘以相应的权重以产生一组加权信号，然后将它们相加以产生输出信号。 输出信号被阈值化并从输出信号中减去，以产生周期性采样的误差信号。 在数字加权更新电路中，权重由采样误差信号的数字化版本和接收信号的延迟副本的采样产生。