公开(公告)号：US07885604B2

公开(公告)日：2011-02-08

申请号：US11437998

申请日：2006-05-18

申请人： Daniel Wee ,  Hang Li ,  Weidong Yang ,  Guanghan Xu

发明人： Daniel Wee ,  Hang Li ,  Weidong Yang ,  Guanghan Xu

IPC分类号： H04B1/00 ,  H04B7/212 ,  H04B7/00 ,  H04B15/00 ,  H04J4/00 ,  H04W24/00

CPC分类号： H04W16/18 ,  H04B1/7103 ,  H04B2201/709709 ,  H04J11/005 ,  H04J13/16 ,  H04W16/10 ,  H04W28/18 ,  H04W72/00 ,  H04W72/08 ,  H04W88/08 ,  H04W88/12

摘要： A method and system for interference reduction for telecommunication systems are disclosed. The system comprises a base station control device (BCD) for configuring one or more parameters for operating one or more base stations (BSs), a first BS covering a first cell having one or more mobile terminals therein, a second BS covering a second cell neighboring to the first cell and sharing a predetermined frequency band with the first cell, wherein one or more radio frames constructed for communications between the first BS and any mobile terminal of the first cell and one or more radio frames constructed for communications between the second BS and any mobile terminal of the second cell are distinguishable by defining different channel configuration sets having one or more operation parameters, wherein the parameters includes a training sequence, a spreading code, and a channel observation window position.

公开(公告)号：US20100220694A1

公开(公告)日：2010-09-02

申请号：US12680668

申请日：2008-09-27

申请人： Jun Huang ,  Hang Li ,  Guanghan Xu

发明人： Jun Huang ,  Hang Li ,  Guanghan Xu

IPC分类号： H04W72/04

CPC分类号： H04W56/0005 ,  H04W64/006

摘要： The present invention provides a ranging method and apparatus, a frame structure includes one or more downlink service time slots, a guard interval between downlink sub-frame and uplink sub-frame and one or more uplink service time slots, and the method includes calculating start time of the first uplink service time slot, configuring the start time as reference time; generating a ranging signal; subtract a sum of time period needed for sending the ranging signal and reference time delay from the reference time and configure obtained time result as time of starting to send the ranging signal; subtract the length of a special ranging time slot from the reference time and configure obtained time result as time of starting to receive the ranging signal by a BS; receiving and processing the ranging signal. By the method and apparatus, all kinds of interference are minimized and an optimum ranging function is implemented.

摘要翻译： 本发明提供了一种测距方法和装置，帧结构包括一个或多个下行链路业务时隙，下行链路子帧与上行链路子帧之间的保护间隔以及一个或多个上行链路业务时隙，并且该方法包括：计算开始 第一个上行链路服务时隙的时间，将开始时间配置为参考时间; 产生测距信号; 从参考时间减去发送测距信号和参考时间延迟所需的时间周期总和，并将获取的时间结果配置为开始发送测距信号的时间; 从参考时间减去特殊测距时隙的长度，并将获得的时间结果配置为由BS开始接收测距信号的时间; 接收和处理测距信号。 通过该方法和装置，各种干扰被最小化并且实现了最佳测距功能。

公开(公告)号：US20100208676A1

公开(公告)日：2010-08-19

申请号：US12680667

申请日：2008-09-27

申请人： Hang Li ,  Guanghan Xu

发明人： Hang Li ,  Guanghan Xu

IPC分类号： H04W72/04

CPC分类号： H04L5/0007 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0087 ,  H04L5/0096 ,  H04L25/03343 ,  H04L2025/03802

摘要： Embodiments of the present invention provide a signal transmission method and apparatus used in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, to enhance stability of signal transmission and resist time-frequency dispersion. The signal transmission method used in the OFDMA wireless communication system provided by an embodiment of the invention includes: converting an L×1 symbol vector into an N×1 modulating signal vector according to a loading factor fed back by a receiving party, in which value of N is known, both L and N are natural numbers larger than one, N is larger than or equal to L, the loading factor is a ratio of L and N; mapping the N×1 modulating signal vector into N time-frequency grids; and converting the N time-frequency grids into a signal waveform and sending the signal waveform to the receiving party.

摘要翻译： 本发明的实施例提供了一种在正交频分多址（OFDMA）无线通信系统中使用的信号传输方法和装置，以增强信号传输的稳定性并抵抗时间 - 频率分散。 在本发明实施例提供的OFDMA无线通信系统中使用的信号传输方法包括：根据接收方反馈的负载因子将L×1符号向量转换为N×1个调制信号向量，其中值 N是已知的，L和N都是大于1的自然数，N大于或等于L，负载系数是L和N的比值; 将N×1调制信号矢量映射为N个时频网格; 并将N个时频网格转换成信号波形并将信号波形发送到接收方。

公开(公告)号：US08320317B2

公开(公告)日：2012-11-27

申请号：US12680668

申请日：2008-09-27

申请人： Jun Huang ,  Hang Li ,  Guanghan Xu

发明人： Jun Huang ,  Hang Li ,  Guanghan Xu

IPC分类号： H04W4/00

CPC分类号： H04W56/0005 ,  H04W64/006

摘要： The present invention provides a ranging method and apparatus, a frame structure includes one or more downlink service time slots, a guard interval between downlink sub-frame and uplink sub-frame and one or more uplink service time slots, and the method includes calculating start time of the first uplink service time slot, configuring the start time as reference time; generating a ranging signal; subtract a sum of time period needed for sending the ranging signal and reference time delay from the reference time and configure obtained time result as time of starting to send the ranging signal; subtract the length of a special ranging time slot from the reference time and configure obtained time result as time of starting to receive the ranging signal by a BS; receiving and processing the ranging signal. By the method and apparatus, all kinds of interference are minimized and an optimum ranging function is implemented.

摘要翻译： 本发明提供了一种测距方法和装置，帧结构包括一个或多个下行链路业务时隙，下行链路子帧与上行链路子帧之间的保护间隔以及一个或多个上行链路业务时隙，并且该方法包括：计算起始 第一个上行链路服务时隙的时间，将开始时间配置为参考时间; 产生测距信号; 从参考时间减去发送测距信号和参考时间延迟所需的时间之和，并将获取的时间结果配置为开始发送测距信号的时间; 从参考时间减去特殊测距时隙的长度，并将获得的时间结果配置为由BS开始接收测距信号的时间; 接收和处理测距信号。 通过该方法和装置，各种干扰被最小化并且实现了最佳测距功能。

公开(公告)号：US20070010203A1

公开(公告)日：2007-01-11

申请号：US11437998

申请日：2006-05-18

申请人： Daniel Wee ,  Hang Li ,  Weidong Yang ,  Guanghan Xu

发明人： Daniel Wee ,  Hang Li ,  Weidong Yang ,  Guanghan Xu

IPC分类号： H04B1/00 ,  H04B15/00

CPC分类号： H04W16/18 ,  H04B1/7103 ,  H04B2201/709709 ,  H04J11/005 ,  H04J13/16 ,  H04W16/10 ,  H04W28/18 ,  H04W72/00 ,  H04W72/08 ,  H04W88/08 ,  H04W88/12

摘要： A method and system for interference reduction for telecommunication systems are disclosed. The system comprises a base station control device (BCD) for configuring one or more parameters for operating one or more base stations (BSs), a first BS covering a first cell having one or more mobile terminals therein, a second BS covering a second cell neighboring to the first cell and sharing a predetermined frequency band with the first cell, wherein one or more radio frames constructed for communications between the first BS and any mobile terminal of the first cell and one or more radio frames constructed for communications between the second BS and any mobile terminal of the second cell are distinguishable by defining different channel configuration sets having one or more operation parameters, wherein the parameters includes a training sequence, a spreading code, and a channel observation window position.

摘要翻译： 公开了用于电信系统的干扰减少的方法和系统。 该系统包括用于配置用于操作一个或多个基站（BS）的一个或多个参数的基站控制设备（BCD），覆盖其中具有一个或多个移动终端的第一小区的第一BS，覆盖第二小区的第二BS 与所述第一小区相邻并且与所述第一小区共享预定频带，其中为所述第一小区和所述第一小区的任何移动终端之间的通信而构造的一个或多个无线电帧以及为所述第二小区之间的通信而构造的一个或多个无线电帧 并且通过定义具有一个或多个操作参数的不同的信道配置集来区分第二小区的任何移动终端，其中参数包括训练序列，扩展码和信道观察窗口位置。

公开(公告)号：US08174960B2

公开(公告)日：2012-05-08

申请号：US12682441

申请日：2008-10-08

申请人： Guanghan Xu ,  Hang Li ,  Jun Huang

发明人： Guanghan Xu ,  Hang Li ,  Jun Huang

IPC分类号： H04J11/00

CPC分类号： H04L5/0019 ,  H04B7/0617 ,  H04B7/068 ,  H04L25/0204

摘要： A time division duplex wireless communication system based on Code Spreading-Orthogonal Frequency Division Multiple Access (CS-OFDMA) and a smart antenna includes: an antenna array and multichannel transceiver, a space processor, a demodulator, an L2 processor and a modulator. The CS-OFDMA system provided by the present invention combines synchronous CDMA technique and OFDMA technique, overcomes the severe ISI caused by spectrum-spreading by the conventional CDMA system while transmitting wideband data, effectively counteracts frequency-selective fading and inter-cell interference, and is beneficial to reliable transmission of narrowband voice and wideband data and also beneficial to co-frequency networking.

摘要翻译： 基于代码扩展 - 正交频分多址（CS-OFDMA）和智能天线的时分双工无线通信系统包括：天线阵列和多信道收发器，空间处理器，解调器，L2处理器和调制器。 本发明提供的CS-OFDMA系统结合了同步CDMA技术和OFDMA技术，克服了常规CDMA系统频谱扩展引起的严重ISI，同时传输宽带数据，有效抵消频率选择性衰落和小区间干扰， 有利于窄带语音和宽带数据的可靠传输，也有利于同频网络。

公开(公告)号：US20110076954A1

公开(公告)日：2011-03-31

申请号：US12961741

申请日：2010-12-07

申请人： Daniel Wee ,  Hang Li ,  Weidong Yang ,  Guanghan Xu

发明人： Daniel Wee ,  Hang Li ,  Weidong Yang ,  Guanghan Xu

IPC分类号： H04B1/00

CPC分类号： H04W16/18 ,  H04B1/7103 ,  H04B2201/709709 ,  H04J11/005 ,  H04J13/16 ,  H04W16/10 ,  H04W28/18 ,  H04W72/00 ,  H04W72/08 ,  H04W88/08 ,  H04W88/12

摘要： A method and system for interference reduction for telecommunication systems are disclosed. The system comprises a base station control device (BCD) for configuring one or more parameters for operating one or more base stations (BSs), a first BS covering a first cell having one or more mobile terminals therein, a second BS covering a second cell neighboring to the first cell and sharing a predetermined frequency band with the first cell, wherein one or more radio frames constructed for communications between the first BS and any mobile terminal of the first cell and one or more radio frames constructed for communications between the second BS and any mobile terminal of the second cell are distinguishable by defining different channel configuration sets having one or more operation parameters, wherein the parameters includes a training sequence, a spreading code, and a channel observation window position.

摘要翻译： 公开了用于电信系统的干扰减少的方法和系统。 该系统包括用于配置用于操作一个或多个基站（BS）的一个或多个参数的基站控制设备（BCD），覆盖其中具有一个或多个移动终端的第一小区的第一BS，覆盖第二小区的第二BS 与所述第一小区相邻并且与所述第一小区共享预定频带，其中为所述第一小区和所述第一小区的任何移动终端之间的通信而构造的一个或多个无线电帧以及为所述第二小区之间的通信而构造的一个或多个无线电帧 并且通过定义具有一个或多个操作参数的不同的信道配置集来区分第二小区的任何移动终端，其中参数包括训练序列，扩展码和信道观察窗口位置。

公开(公告)号：US20100238846A1

公开(公告)日：2010-09-23

申请号：US12682441

申请日：2008-10-08

申请人： Guanghan Xu ,  Hang Li ,  Jun Huang

发明人： Guanghan Xu ,  Hang Li ,  Jun Huang

IPC分类号： H04J3/00 ,  H04W72/04

CPC分类号： H04L5/0019 ,  H04B7/0617 ,  H04B7/068 ,  H04L25/0204

摘要： A time division duplex wireless communication system based on Code Spreading-Orthogonal Frequency Division Multiple Access (CS-OFDMA) and a smart antenna includes: an antenna array and multichannel transceiver, a space processor, a demodulator, an L2 processor and a modulator. The CS-OFDMA system provided by the present invention combines synchronous CDMA technique and OFDMA technique, overcomes the severe ISI caused by spectrum-spreading by the conventional CDMA system while transmitting wideband data, effectively counteracts frequency-selective fading and inter-cell interference, and is beneficial to reliable transmission of narrowband voice and wideband data and also beneficial to co-frequency networking.

摘要翻译： 基于代码扩展 - 正交频分多址（CS-OFDMA）和智能天线的时分双工无线通信系统包括：天线阵列和多信道收发器，空间处理器，解调器，L2处理器和调制器。 本发明提供的CS-OFDMA系统结合了同步CDMA技术和OFDMA技术，克服了常规CDMA系统频谱扩展引起的严重ISI，同时传输宽带数据，有效抵消频率选择性衰落和小区间干扰， 有利于窄带语音和宽带数据的可靠传输，也有利于同频网络。

公开(公告)号：US07349504B2

公开(公告)日：2008-03-25

申请号：US11083478

申请日：2005-03-18

申请人： Hang Li ,  Guanghan Xu

发明人： Hang Li ,  Guanghan Xu

IPC分类号： H03D1/04

CPC分类号： H04W52/243 ,  H04B17/336 ,  H04L1/0003

摘要： A method and system for mitigating interference in a communication system, comprising at least one base station and at least one terminal, are disclosed. The base stations and terminals communicate through a channel existing between them, and the channels include at least a first signal channel and a second signal channel. The method includes determination of channel, noise and self-interference characteristic, computation of a rate limit of the channels, computation of the rate assignment of the channels, and assignment of the computed rate assignments to the channels. In another aspect of the present invention, the method includes determination of channel characteristics; computation of a power control margin, self-interference characteristics, power control command; and assignment of the computed power control command to each communicating terminal and base station. The above power and rate control methods may operate jointly to mitigate both intra-cell and inter-cell interference in wireless communication systems.

摘要翻译： 公开了一种用于减轻包括至少一个基站和至少一个终端的通信系统中的干扰的方法和系统。 基站和终端通过它们之间存在的信道通信，并且信道至少包括第一信号信道和第二信号信道。 该方法包括信道，噪声和自干扰特性的确定，信道的速率限制的计算，信道的速率分配的计算以及所计算的速率分配到信道的分配。 在本发明的另一方面，所述方法包括确定信道特性; 功率控制余量的计算，自干扰特性，功率控制指令; 以及将计算出的功率控制命令分配给每个通信终端和基站。 上述功率和速率控制方法可以共同操作以减轻无线通信系统中的小区内和小区间干扰。

公开(公告)号：US06157340A

公开(公告)日：2000-12-05

申请号：US179047

申请日：1998-10-26

申请人： Guanghan Xu ,  Xinguang Xu ,  Fuqi Mu ,  Daniel Wee ,  Yu Xia

发明人： Guanghan Xu ,  Xinguang Xu ,  Fuqi Mu ,  Daniel Wee ,  Yu Xia

IPC分类号： H01Q3/26 ,  H04B7/06 ,  H04B7/08 ,  H04B17/00 ,  G01S7/40

CPC分类号： H04B7/086 ,  H01Q3/2605 ,  H01Q3/267 ,  H04B17/12 ,  H04B7/0615 ,  H04B7/0617

摘要： A communication system having an adaptive antenna array subsystem generates calibration information for the adaptive array subsystem by measuring the amplitude and phase of modulated signals within the subsystem at the antenna array mount and at the back plane mount for the transmit and receive array. The calibration information is used to more accurately perform beamforming for both received an transmitted information signals. The communication system uses a time diversity duplex (TDD) synchronous code division multiple access (SCDMA) protocol for wireless communication between remote terminals and a base station. The calibration means uses a combination combiner and splitter having matched micro strip lines incorporated into a printed circuit board in either the antenna array mount or the back plane.

摘要翻译： 具有自适应天线阵列子系统的通信系统通过测量在天线阵列安装座处的子系统内以及用于发射和接收阵列的背面安装座处的调制信号的幅度和相位来产生用于自适应阵列子系统的校准信息。 校准信息用于更准确地对接收到的所发送的信息信号进行波束成形。 通信系统使用时间分集双工（TDD）同步码分多址（SCDMA）协议，用于远程终端与基站之间的无线通信。 校准装置使用组合组合器和分离器，其具有并入到天线阵列安装件或背板中的印刷电路板中的匹配的微带线。