公开(公告)号：US08958394B2

公开(公告)日：2015-02-17

申请号：US13108109

申请日：2011-05-16

申请人： Kai Xu ,  Chen Zixiong ,  Ni Ma ,  Kai Sun ,  Bei Zhou ,  Ying Wang ,  Ping Zhang

发明人： Kai Xu ,  Chen Zixiong ,  Ni Ma ,  Kai Sun ,  Bei Zhou ,  Ying Wang ,  Ping Zhang

IPC分类号： H04W4/00 ,  H04B17/00 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04L5/00

CPC分类号： H04B17/0062 ,  H04B7/0615 ,  H04B17/21 ,  H04L1/0026 ,  H04L1/0625 ,  H04L5/006

摘要： A technique for operating a wireless communications system that supports multi-user multiple-input multiple-output (MU-MIMO) communications between a base station and multiple mobile stations involves generating inter-cell interference information at the mobile stations and providing the inter-cell interference information to the base station. The base station uses the inter-cell interference information to calculate channel quality indicators (CQIs) and then makes scheduling decisions in response to the CQIs. Data is transmitted from the base station to the mobile stations according to the scheduling decisions.

摘要翻译： 一种用于操作支持基站与多个移动站之间的多用户多输入多输出（MU-MIMO）通信的无线通信系统的技术涉及在移动站处产生小区间干扰信息并提供小区间 干扰信息给基站。 基站使用小区间干扰信息来计算信道质量指示符（CQI），然后响应于CQI进行调度决定。 根据调度决定，从基站向移动台发送数据。

公开(公告)号：US08542572B2

公开(公告)日：2013-09-24

申请号：US12450378

申请日：2008-03-18

申请人： Xiaobo Zhang ,  Ni Ma ,  Gang Wu ,  Xun Fan ,  Qi Zhou

发明人： Xiaobo Zhang ,  Ni Ma ,  Gang Wu ,  Xun Fan ,  Qi Zhou

IPC分类号： H04J11/00 ,  H04W4/00

CPC分类号： H04B1/707 ,  H04J13/16 ,  H04W72/00 ,  H04W72/04 ,  H04W88/08

摘要： A method for wireless communication between a base station and a plurality of subscriber stations is described wherein a communication capacity is partitioned in resource units at least by code multiplexing, which resource units are distributed by the base station over said devices, wherein data from each subscriber station is spread by means of a signature sequence, characterized in that multiple resource units assigned to a common subscriber station have the same signature sequence.

摘要翻译： 描述了一种用于基站和多个用户站之间的无线通信的方法，其中至少通过代码复用以资源单元划分通信容量，哪些资源单元由基站在所述设备上分发，其中每个订户的数据 站点通过签名序列扩展，其特征在于分配给公共用户站的多个资源单元具有相同的签名序列。

公开(公告)号：US08432984B2

公开(公告)日：2013-04-30

申请号：US13057451

申请日：2008-08-04

申请人： Xiaobo Zhang ,  Ni Ma

发明人： Xiaobo Zhang ,  Ni Ma

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2602 ,  H04L5/0007 ,  H04L5/0037 ,  H04L27/2636 ,  H04L27/265

摘要： Orthogonal Frequency Division Multiplexing (OFDM) is a typical multi-carrier technique that has been applied by many advanced wireless communication systems, e.g., 3GPP Long Term Evolution (LTE) and WiMAX. In order to support high mobility transmission, the sub-carrier spacing of multi-carrier systems is made large enough to overcome the Doppler frequency offset. However, this large sub-carrier spacing results in lower transmission efficiency since the CP (Cyclic Prefix) consumes a considerable of radio resources. The present invention provides an adaptive scheme to determine the sub-carrier spacing in which the default sub-carrier spacing is set to support lower mobility, while the adaptively adjusted sub-carrier spacing based on User Equipment (UE) mobile velocities is set to support higher mobility.

摘要翻译： 正交频分复用（OFDM）是一种典型的多载波技术，已经被许多先进的无线通信系统应用，例如3GPP长期演进（LTE）和WiMAX。 为了支持高移动性传输，多载波系统的子载波间隔足够大以克服多普勒频率偏移。 然而，由于CP（循环前缀）消耗相当多的无线电资源，所以这种大的子载波间隔导致较低的传输效率。 本发明提供一种自适应方案，用于确定其中默认子载波间隔被设置为支持较低移动性的子载波间隔，而基于用户设备（UE）移动速度的自适应调整的子载波间隔被设置为支持 更高的流动性

公开(公告)号：US20120014465A1

公开(公告)日：2012-01-19

申请号：US13057259

申请日：2008-08-04

申请人： Xiabo Zhang ,  Ni Ma

发明人： Xiabo Zhang ,  Ni Ma

IPC分类号： H04B1/10 ,  H04L27/28

CPC分类号： H04L25/03159 ,  H04L5/0007 ,  H04L5/0051 ,  H04L25/0228 ,  H04L25/03821 ,  H04L27/2647

摘要： A linear iterative channel estimation scheme and corresponding pilot allocation scheme are provided to perfect a channel model that cancels the Inter-Carrier Interference (ICI) for multi-carrier systems (e.g., OFDM, SC-FDMA, MC-CDMA, etc.) under high mobility conditions. Two issues of the linear iterative channel estimation scheme of the channel model, namely, overloaded pilots and increased Gauss noise are specifically addressed by exemplary embodiments. With the iterative channel estimation scheme provided by the present invention, the minimum pilot number is equal to the length of multi-path delay, and the Gauss noise is not increased.

摘要翻译： 提供线性迭代信道估计方案和相应的导频分配方案，以完善消除多载波系统（例如，OFDM，SC-FDMA，MC-CDMA等）的载波间干扰（ICI）的信道模型， 高流动性条件。 通过示例性实施例具体解决了信道模型的线性迭代信道估计方案的两个问题，即过载导频和增加的高斯噪声。 利用本发明提供的迭代信道估计方案，最小导频数等于多径延迟的长度，高斯噪声不增加。

公开(公告)号：US20110135019A1

公开(公告)日：2011-06-09

申请号：US13057276

申请日：2008-08-04

申请人： Xiabo Zhang ,  Ni Ma

发明人： Xiabo Zhang ,  Ni Ma

IPC分类号： H04L27/00

CPC分类号： H04L25/03159 ,  H04L25/022 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/03821

摘要： In multi-carrier systems, distributed resource allocation of the resources of multiple user equipments (UEs) can result in better frequency diversity gain but can also induce Inter-Carrier Interference (ICI) between UEs. This ICI can become quite serious in a high mobility environment. Based on a novel radio channel model for ICI cancellation in multi-carrier systems and an iterative channel estimation scheme for ICI cancellation in multi-carrier systems, the present invention provides a simplified equalization scheme in the frequency domain to determine and remove ICI of both a targeting UE as well as other UEs.

摘要翻译： 在多载波系统中，多用户设备（UE）的资源的分布式资源分配可以导致更好的频率分集增益，但也可以引起UE间的载波间干扰（ICI）。 这个ICI在高移动性环境中可能变得相当严重。 基于用于多载波系统中的ICI消除的新型无线电信道模型和用于多载波系统中的ICI消除的迭代信道估计方案，本发明提供了频域中的简化均衡方案，以确定和去除两个 瞄准UE以及其他UE。

公开(公告)号：US20110135018A1

公开(公告)日：2011-06-09

申请号：US13057233

申请日：2008-08-04

申请人： Xiabo Zhang ,  Ni Ma

发明人： Xiabo Zhang ,  Ni Ma

IPC分类号： H04L27/00

CPC分类号： H04L25/03159 ,  H04L25/022 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/03821

摘要： A channel modeling method for Inter Carrier Interference (ICI) cancellation in multi-carrier wireless communication systems comprises: describing the channel with a plurality of fixed matrices and an equal-numbered plurality of unfixed variables; one-to-one pairing each of the described plurality of unfixed variables with one of described plurality of fixed matrices. Corresponding system is also provided. The method and system can compensate for the channel distortion of the Doppler Effect even if the Doppler Frequency Offset is relatively significant.

摘要翻译： 一种用于多载波无线通信系统中的载波间干扰（ICI）消除的信道建模方法，包括：用多个固定矩阵和等于多个非固定变量描述信道; 将所描述的多个未固定变量中的每一个与所述多个固定矩阵中的一个进行一对一配对。 还提供了相应的系统。 该方法和系统可以补偿多普勒效应的信道失真，即使多普勒频率偏移相对较大。

公开(公告)号：US20100311428A1

公开(公告)日：2010-12-09

申请号：US12733710

申请日：2008-09-15

申请人： Xiaobo Zhang ,  Ni Ma ,  Gang Wu

发明人： Xiaobo Zhang ,  Ni Ma ,  Gang Wu

IPC分类号： H04W74/00

CPC分类号： H04L5/0007 ,  H04J11/005 ,  H04J13/0062 ,  H04L5/005 ,  H04L27/2613 ,  H04L27/2662 ,  H04W74/08

摘要： A cellular phone system where a random access channel burst has a preamble comprising two Zadoff-Chu sequences to mitigate the effects of Doppler Frequency Offset. Upon reception of a random access channel burst by a base station, division is applied to the two sequences recovered from the preamble of the received burst to provide a quotient sequence. For some embodiments, the base station correlates the quotient sequence with a Zadoff- Chu sequence to identify the user equipment that transmitted the random access channel burst. Other embodiments are described and claimed.

摘要翻译： 一种蜂窝电话系统，其中随机接入信道突发具有包括两个Zadoff-Chu序列的前导码，以减轻多普勒频率偏移的影响。 在由基站接收到随机接入信道突发时，对从接收到的突发的前同步码恢复的两个序列进行分割，以提供商序列。 对于一些实施例，基站将商序列与Zadoff-Chu序列相关联，以识别发送随机接入信道突发的用户设备。 描述和要求保护其他实施例。

公开(公告)号：US20100074218A1

公开(公告)日：2010-03-25

申请号：US11993606

申请日：2006-06-27

申请人： Lingyun Cai ,  Ni Ma

发明人： Lingyun Cai ,  Ni Ma

IPC分类号： H04W36/00

CPC分类号： H04W36/0085 ,  H04W36/14

摘要： The present invention provides a method and apparatus applied to pilot capture for handover between wireless communication networks. In the method, when a mobile station needs to hand over from a GSM system serving as current service network to another wireless communication network, the GSM system and the mobile station will update the logic location of the first idle frame to be met subsequently, which will be inserted after the TDMA frame where the corresponding starting point of pilot capture resides, then the mobile station utilizes idle timeslots after the starting point to form a pilot capture time window with a predefined length, eventually the mobile station captures the pilot signal of the another wireless communication network in the pilot capture time window. Comparing to conventional pilot capture method, with the method provided by the present invention, the mobile station not only capture the complete pilot signal of target handover network, but also achieve the whole pilot-capture process with relatively short time.

摘要翻译： 本发明提供一种应用于无线通信网络之间切换的导频捕获的方法和装置。 在该方法中，当移动台需要从作为当前业务网络的GSM系统切换到另一无线通信网络时，GSM系统和移动台将更新要随后满足的第一空闲帧的逻辑位置， 将在导频捕获的相应起始点所在的TDMA帧之后插入，然后移动台利用起始点之后的空闲时隙来形成具有预定长度的导频捕获时间窗，最终移动站捕获导频信号的导频信号 另一个无线通信网络在飞行员捕捉时间窗口中。 与传统的导频捕获方法相比，利用本发明提供的方法，移动台不仅捕获目标切换网络的完整导频信号，而且在相对短的时间内实现整个导频捕获过程。

公开(公告)号：US20080198800A1

公开(公告)日：2008-08-21

申请号：US11914761

申请日：2006-05-10

申请人： Xiaobo Zhang ,  Ni Ma ,  Yueheng Li

发明人： Xiaobo Zhang ,  Ni Ma ,  Yueheng Li

IPC分类号： H04Q7/00

CPC分类号： H04W72/1257 ,  H04W72/1268

摘要： The present invention provides a method and apparatus used for enhanced uplink data transmission, comprising the steps of: monitoring the communication status of a plurality of UEs (user equipment) which conduct uplink data transmission in the RAN; receiving the data transmitted on at least one dedicated uplink channel from at least one of the plurality of UEs; according to the communication status of the plurality of UEs, dynamically allocating the number of dedicated uplink channels for at least one UE of the plurality of UEs. Utilization of the present invention can enable mobile terminal to conduct more efficient uplink transmission.

摘要翻译： 本发明提供一种用于增强上行链路数据传输的方法和装置，包括以下步骤：监视在RAN中进行上行链路数据传输的多个UE（用户设备）的通信状态; 从所述多个UE中的至少一个接收在至少一个专用上行链路信道上发送的数据; 根据多个UE的通信状况，为多个UE中的至少一个UE动态分配专用上行链路信道的数量。 本发明的利用可以使得移动终端能够进行更有效的上行链路传输。

公开(公告)号：US08811505B2

公开(公告)日：2014-08-19

申请号：US13057233

申请日：2008-08-04

申请人： Xiabo Zhang ,  Ni Ma

发明人： Xiabo Zhang ,  Ni Ma

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/03159 ,  H04L25/022 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/03821

摘要： A channel modeling method for Inter Carrier Interference (ICI) cancellation in multi-carrier wireless communication systems comprises: describing the channel with a plurality of fixed matrices and an equal-numbered plurality of unfixed variables; one-to-one pairing each of the described plurality of unfixed variables with one of described plurality of fixed matrices. Corresponding system is also provided. The method and system can compensate for the channel distortion of the Doppler Effect even if the Doppler Frequency Offset is relatively significant.

摘要翻译： 一种用于多载波无线通信系统中的载波间干扰（ICI）消除的信道建模方法，包括：用多个固定矩阵和等于多个非固定变量描述信道; 将所描述的多个未固定变量中的每一个与所述多个固定矩阵中的一个进行一对一配对。 还提供了相应的系统。 该方法和系统可以补偿多普勒效应的信道失真，即使多普勒频率偏移相对较大。