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1. 发明申请

WO2009088328A1 ZERO-FORCING LINEAR BEAMFORMING FOR COORDINATED CELLULAR NETWORKS WITH DISTRIBUTED ANTENNAS 审中-公开
标题翻译：用于与分布式天线协调的蜂窝网络的零强度线性光束
公开(公告)号：WO2009088328A1
公开(公告)日：2009-07-16
申请号：PCT/SE2008/050019
申请日：2008-01-08
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , ZANGI, Kambiz , HUI, Dennis
发明人： ZANGI, Kambiz , HUI, Dennis
IPC分类号： H04B7/06 , H04B7/04 , H04L1/00
CPC分类号： H04B7/0617 , H04B7/024 , H04B7/0426 , H04B7/0465 , H04W52/346
摘要： In a distributed antenna system (100) that includes a plurality of transmitters (115) and a controller (110), a method, performed by the controller (110), may be characterized by performing dirty-paper coding on downlink transmissions to users based on an order of the users, calculating beamforming vectors to provide that each of the downlink transmissions associated with each of the users does not interfere with other users, and maximizing, based on the calculated beamforming vectors, a data rate subject to a power constraint of the distributed antenna system (100).
摘要翻译：在包括多个发射机（115）和控制器（110）的分布式天线系统（100）中，由控制器（110）执行的方法的特征在于，对基于用户的下行链路传输执行脏纸编码根据用户的顺序，计算波束形成向量以提供与每个用户相关联的每个下行链路传输不干扰其他用户，并且基于所计算的波束成形向量最大化受到功率约束的数据速率分布式天线系统（100）。

2. 发明申请

WO2009058129A1 DISTRIBUTED ANTENNA SYSTEM 审中-公开
标题翻译：分布式天线系统
公开(公告)号：WO2009058129A1
公开(公告)日：2009-05-07
申请号：PCT/US2007/082955
申请日：2007-10-30
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , GUEY, Jiann-ching , ZANGI, Kambiz
发明人： GUEY, Jiann-ching , ZANGI, Kambiz
IPC分类号： H04Q7/38
CPC分类号： H04W36/18 , H04W16/04 , H04W16/32 , H04W36/04
摘要： A wireless communication network employs a distributed antenna system to provide radio coverage. The wireless communication network comprises a plurality of access points providing service in respective coverage areas. The access point within each coverage area connects to a plurality of antennas that are widely distributed within the coverage area. Radio resources at antennas within the overlapping region of two or more neighboring coverage areas are shared by the access points in the neighboring coverage areas according to a multiple access scheme. The sharing of radio resources within the overlapping region of two or more coverage areas allows the overlapping region to be enlarged, thereby providing more time to complete a handover.
摘要翻译：无线通信网络采用分布式天线系统来提供无线覆盖。无线通信网络包括在相应覆盖区域中提供服务的多个接入点。每个覆盖区域内的接入点连接到广泛分布在覆盖区域内的多个天线。根据多址方案，在两个或多个相邻覆盖区域的重叠区域内的天线处的无线电资源由相邻覆盖区域中的接入点共享。在两个或多个覆盖区域的重叠区域内的无线电资源的共享允许重叠区域被扩大，从而提供更多的时间来完成切换。

3. 发明申请

WO2007042425A1 SYNCHRONIZATION CHANNEL SCHEME FOR SUPER 3G 审中-公开
标题翻译：超3G同步通道方案
公开(公告)号：WO2007042425A1
公开(公告)日：2007-04-19
申请号：PCT/EP2006/066979
申请日：2006-10-03
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , LINDOFF, Bengt , PARKVALL, Stefan , ZANGI, Kambiz , BALDEMAIR, Robert
发明人： LINDOFF, Bengt , PARKVALL, Stefan , ZANGI, Kambiz , BALDEMAIR, Robert
IPC分类号： H04L27/26
CPC分类号： H04L27/2685 , H04B2201/70702 , H04J11/0069 , H04L5/0007 , H04L5/005 , H04L5/0053 , H04L5/0064 , H04L27/2613 , H04L27/2655
摘要： An apparatus and method operable to enable the use of synchronization (SCH) and broadcast channel (BCH) signals with a bandwidth (BW) equal to the minimum possible BW for the system, for example 1.25 MHz. The present invention increases the speed of the initial cell search. In addition, the repetition of signals in the frequency domain makes it possible to perform a faster cell detection in the event a system/mobile terminal/UE is using a larger BW. When the present invention is used in a high BW system, a mobile terminal/UE is operable to determine whether to perform a cell search on a low or high BW to get sufficient cell detection performance.
摘要翻译：一种可用于使能同步（SCH）和广播信道（BCH）信号的装置和方法，其中带宽（BW）等于系统的最小可能BW，例如1.25MHz。本发明增加了初始小区搜索的速度。此外，频域中的信号的重复使得可以在系统/移动终端/ UE正在使用较大的BW的情况下执行更快的小区检测。当本发明用于高BW系统时，移动终端/ UE可操作以确定是否在低或高BW上执行小区搜索以获得足够的小区检测性能。

4. 发明申请

WO2010067184A2 PRECODING WITH REDUCED FEEDBACK FOR COORDINATED MULTIPOINT TRANSMISSION ON THE DOWNLINK 审中-公开
标题翻译：在下行链路上进行协调的多点传输减少反馈预编码
公开(公告)号：WO2010067184A2
公开(公告)日：2010-06-17
申请号：PCT/IB2009/007706
申请日：2009-12-09
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , ZANGI, Kambiz
发明人： ZANGI, Kambiz
IPC分类号： H04L25/03
CPC分类号： H04L25/03343 , H04L25/0206 , H04L2025/03426
摘要： Techniques for reducing the number of bits needed to specify the best precoding vector for each mobile station in a wireless communication network that employs multi-point transmission are disclosed. An exemplary method begins with the estimation of path loss between a mobile station and each of a plurality of geographically separated transmitter sites, each transmitter site having at least one transmitter antenna. Based on the estimated path losses, one of a plurality of pre-determined subsets (codebooks) of a pre-determined set of antenna precoding vectors is selected. A group index identifying the selected subset is then transmitted to the mobile station. Subsequently, a vector index is received from the mobile station, the vector index corresponding to a precoding vector in the selected subset, and data is transmitted to the mobile station, using the precoding vector applied to the transmitter antennas at the plurality of transmitter sites.
摘要翻译：公开了用于减少在采用多点传输的无线通信网络中为每个移动台指定最佳预编码矢量所需的比特数量的技术。一种示例性方法开始于估计移动站与多个地理上分离的发射机站点中的每一个之间的路径损耗，每个发射机站点具有至少一个发射机天线。基于估计的路径损耗，选择预定的天线预编码矢量集合的多个预定子集（码本）之一。识别所选子集的组索引然后被发送到移动台。随后，从移动台接收向量索引，对应于所选子集中的预编码向量的向量索引，并且使用应用于多个发射机站点处的发射机天线的预编码矢量将数据发送到移动台。

5. 发明申请

WO2010046747A1 CONTENTION-BASED RANDOM ACCESS METHOD WITH AUTONOMOUS CARRIER SELECTION 审中-公开
标题翻译：基于自适应载波选择的基于约束的随机访问方法
公开(公告)号：WO2010046747A1
公开(公告)日：2010-04-29
申请号：PCT/IB2009/007159
申请日：2009-10-19
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , HAFEEZ, Abduirauf , ZANGI, Kambiz
发明人： HAFEEZ, Abduirauf , ZANGI, Kambiz
IPC分类号： H04W74/08
CPC分类号： H04W74/0875
摘要： The method and apparatus described herein controls transmission from a plurality of user terminals to an access point on a random access channel in a wireless communication system. An access point determines an allowed information rate for each user terminal and transmits a rate control parameter indicative of the allowed information rates to the user terminals. The access point also computes a packet transmission probability and transmits the packet transmission probability to the use terminals on a common control channel. The packet transmission probability controls the number of user terminals that transmit in a given time slot to reduce collisions and increase the departure rate. The user terminals selectively transmit one or more packets to the access point in a time slot on the random access channel based on the allowed information rate and the packet transmission probability.
摘要翻译：本文描述的方法和装置控制从无线通信系统中的多个用户终端到随机接入信道上的接入点的传输。接入点确定每个用户终端的允许信息速率，并向用户终端发送指示允许信息速率的速率控制参数。接入点还计算分组传输概率，并且在公共控制信道上向用户终端发送分组传输概率。分组传输概率控制在给定时隙中发送的用户终端的数量，以减少冲突并提高出发率。用户终端基于所允许的信息速率和分组传输概率，在随机接入信道的时隙中选择性地向接入点发送一个或多个分组。

6. 发明申请

WO2009124558A1 A METHOD OF AND A RADIO TRANSMISSION SYSTEM AND RADIO ACCESS EQUIPMENT FOR CELLULAR WIRELESS RADIO TRANSMISSION 审中-公开
标题翻译：无线电无线传输方法和无线电传输系统和无线电接入设备
公开(公告)号：WO2009124558A1
公开(公告)日：2009-10-15
申请号：PCT/EP2008/002755
申请日：2008-04-07
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , SAHLIN, Henrik , LINDGREN, UIf , ZANGI, Kambiz
发明人： SAHLIN, Henrik , LINDGREN, UIf , ZANGI, Kambiz
IPC分类号： H04W88/08
CPC分类号： H04L5/0037 , H04L5/0023 , H04W56/0005 , H04W88/085 , H04W92/10
摘要： Radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based cellular wireless radio transmission system (1 ), wherein radio access equipment (2) of the system connects to multiple geographically spread radio antennas (3, 4, 5) of a Distributed Antenna System, DAS, for transmitting to and receiving radio signals from user equipment (6, 7, 8, 9, 10). Transmit timings for radio transmission between the user equipment (6, 7, 8, 9, 10) and the antennas (3, 4, 5) of the DAS are established. The radio transmission is scheduled based on the established transmit timings.
摘要翻译：在正交频分复用OFDM基于蜂窝无线电传输系统（1）中的无线电传输，其中系统的无线电接入设备（2）连接到分布式天线系统的多个地理上扩展的无线电天线（3,4,5） DAS，用于发送和接收来自用户设备（6,7,8,9,10）的无线电信号。建立用户设备（6,7,8,9,10）与DAS的天线（3,4,5）之间的无线电传输的发送定时。基于建立的发送定时来调度无线电传输。

7. 发明申请

WO2009084990A1 USING SPATIAL PROPERTIES OF MIMO CHANNELS FOR ENHANCED CHANNEL ESTIMATION IN MIMO SYSTEMS 审中-公开
标题翻译：使用MIMO信道的空间属性来增强MIMO系统中的信道估计
公开(公告)号：WO2009084990A1
公开(公告)日：2009-07-09
申请号：PCT/SE2007/051084
申请日：2007-12-27
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , ZANGI, Kambiz , KRASNY, Leonid
发明人： ZANGI, Kambiz , KRASNY, Leonid
IPC分类号： H04B7/08 , H04B7/04 , H04B7/06
CPC分类号： H04B7/0413 , H04L5/0048 , H04L25/0204 , H04L25/0224 , H04L25/0244 , H04L27/2647
摘要： An apparatus for estimating a channel response associated with a multiple input/multiple output (MIMO) system includes an antenna that receives multiple pilot symbols, each of the multiple pilot symbols transmitted from a different one of multiple transmit antennas of a transmitter in the MIMO system. The apparatus further includes a channel estimator that determines spatial, time and frequency correlations of channels of the MIMO system among the multiple transmit antennas when estimating a channel response associated with the MIMO system based on multiple ones of the received plurality of pilot symbols.
摘要翻译：用于估计与多输入/多输出（MIMO）系统相关联的信道响应的装置包括：天线，其接收多个导频符号，所述多个导频符号中的每一个从MIMO系统中的发射机的多个发射天线中的不同发射天线发送。该装置还包括信道估计器，其基于接收到的多个导频符号中的多个导频符号估计与MIMO系统相关联的信道响应，确定MIMO系统在多个发射天线中的信道的空间，时间和频率相关性。

8. 发明申请

WO2011141836A1 EXPLOITING CHANNEL TIME CORRELATION TO REDUCE CHANNEL STATE INFORMATION FEEDBACK BITRATE 审中-公开
标题翻译：消除通道时间关联以减少通道状态信息反馈双向
公开(公告)号：WO2011141836A1
公开(公告)日：2011-11-17
申请号：PCT/IB2011/051758
申请日：2011-04-21
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , CHENG, Jung-Fu , HUI, Dennis , ZANGI, Kambiz , KRASNY, Leonid
发明人： CHENG, Jung-Fu , HUI, Dennis , ZANGI, Kambiz , KRASNY, Leonid
IPC分类号： H04L1/00 , H04B7/06 , H04L1/20 , H04B7/04 , H04B17/00
CPC分类号： H04W72/0413 , H04L1/0019 , H04L1/0028 , H04L1/20 , H04W72/042
摘要： The required bitrate for reporting channel state information from a network transceiver to the network is dramatically reduced, while maintaining fidelity of channel estimates, by exploiting prior channel estimates and the time correlation of channel response. For a selected set of sub-carriers, the transceiver estimates channel frequency response from pilot signals. The transceiver also predicts the frequency response for each selected sub-carrier, by multiplying a state vector comprising prior frequency response estimate and a coefficient vector comprising linear predictive coefficients. The predicted frequency response is subtracted from the estimated frequency response, and the prediction error is quantized and transmitted to the network. The network maintains a corresponding state vector and predictive coefficient vector, and also predicts a frequency response for each selected sub-carrier. The received prediction error is inverse quantized and subtracted from the predicted frequency response to yield a frequency response corresponding to that estimated at the transceiver.
摘要翻译：通过利用先前的信道估计和信道响应的时间相关性，可以显着降低从网络收发器向网络报告信道状态信息所需的比特率，同时保持信道估计的保真度。对于所选择的一组子载波，收发器估计来自导频信号的信道频率响应。收发器还通过将包括先前频率响应估计的状态向量和包括线性预测系数的系数向量相乘来预测每个所选子载波的频率响应。从估计的频率响应中减去预测的频率响应，并将预测误差量化并发送到网络。网络维持相应的状态向量和预测系数向量，并且还预测每个选择的子载波的频率响应。接收的预测误差被反量化，并从预测的频率响应中减去，以产生与在收发机处估计的频率响应相对应的频率响应。

9. 发明申请

WO2010122536A2 CHANNEL STATE INFORMATION RECONSTRUCTION FROM SPARSE DATA 审中-公开
标题翻译：频道数据重新进行信道重建
公开(公告)号：WO2010122536A2
公开(公告)日：2010-10-28
申请号：PCT/IB2010/051808
申请日：2010-04-23
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , CHENG, Jung-Fu , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
发明人： CHENG, Jung-Fu , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
IPC分类号： H04L1/00
CPC分类号： H04B17/0047 , H04B7/024 , H04B7/0626 , H04B7/0639 , H04B17/336 , H04B17/364 , H04L1/0003 , H04L1/0009 , H04L1/0019 , H04L1/0026 , H04L1/20 , H04L25/0212 , H04L25/022 , H04L25/0224
摘要： Accurate downlink channe! estimates are catenated based on infrequently transmitted Channel State information (CS!) feedback data from a UE 20. A plurality of non-uniformly spaced digital CSI feedback samples, representing the frequency response of a downlink communication channel, is received from the UE, The received CS! feedback samples are demodulated and inverse quantized. A time domain tap deiay channel model is generated from the inverse quantized CSI feedback samples. The time domain tap delay channe! model may be frequency-transformed to obtain a reconstructed frequency response of the downlink communication channel in the frequency domain. Alternatively, channel delays may be estimated based on prior delays and/or known references signals transmitted on the uplink. Channel estimates between CS! reporting instances may be predicted, such as by a sample & hold or a linear predictor. The delays may be presumed fixed, and Kalman filter coefficients evolved over time.
摘要翻译：准确的下行通道！基于来自UE20的不常发送的信道状态信息（CS！）反馈数据来估计估计值。从UE接收表示下行链路通信信道的频率响应的多个非均匀间隔的数字CSI反馈样本。收到CS！反馈样本被解调和反量化。从逆量化的CSI反馈样本中产生时域抽头信道模型。时域点击延时通道！模型可以被频率变换以获得频域中的下行链路通信信道的重构频率响应。或者，可以基于在上行链路上发送的先前的延迟和/或已知的参考信号来估计信道延迟。频道估计CS！可以预测报告实例，例如通过采样和保持或线性预测器。可以推测延迟是固定的，并且卡尔曼滤波器系数随时间演化。

10. 发明申请

WO2010122535A2 EFFICIENT UPLINK TRANSMISSION OF CHANNEL STATE INFORMATION 审中-公开
标题翻译：高效率上行链路传输信道状态信息
公开(公告)号：WO2010122535A2
公开(公告)日：2010-10-28
申请号：PCT/IB2010/051807
申请日：2010-04-23
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , CHENG, Jung-Fu , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
发明人： CHENG, Jung-Fu , ZANGI, Kambiz , HUI, Dennis , KRASNY, Leonid
IPC分类号： H04L1/00
CPC分类号： H04B17/0047 , H04B7/024 , H04B7/0626 , H04B7/0639 , H04B17/336 , H04B17/364 , H04L1/0003 , H04L1/0009 , H04L1/0019 , H04L1/0026 , H04L1/20 , H04L25/0212 , H04L25/022 , H04L25/0224
摘要： A UE in a wireless communication network transmits succinct, direct channel state information to the network, enabling coordinated multipoint calculations such as joint processing, without substantially increasing uplink overhead. The UE receives and processes reference symbols over a set of non-uniform!y spaced sub-carriers, selected according to a scheme synchronized to the network. The frequency response for each selected sub- carrier is estimated conventionally, and the results quantized and transmitted to the network on an uplink control channel. The non-uniform sub-carrier selection may be synchronized to the network in a variety of ways.
摘要翻译：无线通信网络中的UE向网络发送简洁的直接信道状态信息，实现诸如联合处理之类的协作多点计算，而基本上不增加上行链路开销。 UE根据与网络同步的方案选择的一组不均匀的间隔子载波上接收和处理参考符号。常规地估计每个所选子载波的频率响应，并且在上行链路控制信道上量化并发送到网络的结果。非均匀子载波选择可以以各种方式与网络同步。

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