公开(公告)号：US20090299715A1

公开(公告)日：2009-12-03

申请号：US12128729

申请日：2008-05-29

申请人： Peter Wing Chan ,  Derek Chun Lee ,  Roger Shu Cheng ,  Chih-Lin I

发明人： Peter Wing Chan ,  Derek Chun Lee ,  Roger Shu Cheng ,  Chih-Lin I

IPC分类号： G06G7/48

CPC分类号： H04L25/0242 ,  H04L25/0256

摘要： A method of modeling wireless communication channels in angular domain is disclosed. The method includes considering radiation patterns 101, 102 of the transmitter antenna and the receiver antenna, wherein the radiation patterns are represented by antenna characteristics sampled at a plurality of angular directions. A method of channel estimation based on the method of modeling wireless communication channel in angular domain is also disclosed.

摘要翻译： 公开了一种在角域中建模无线通信信道的方法。 该方法包括考虑发射机天线和接收机天线的辐射图案101,102，其中辐射图案由在多个角度方向上采样的天线特性表示。 还公开了一种基于角域中无线通信信道建模方法的信道估计方法。

公开(公告)号：US06201799B1

公开(公告)日：2001-03-13

申请号：US08846454

申请日：1997-05-01

申请人： Howard C. Huang ,  Chih-Lin I

发明人： Howard C. Huang ,  Chih-Lin I

IPC分类号： H04B1500

CPC分类号： H04B1/71052 ,  H04B1/709 ,  H04B1/7107 ,  H04B1/7115

摘要： A Multicode (MC) Code Division Multiple Access (CDMA) receiver receives J encoded multicode channels (where J>1) over L multiple air signal paths (where L>1) and forms a decorrelator output vector in which for each of the J multicode channels, the interference caused by the other J−1 multicode channels has been cancelled. When the MC CDMA receiver is a coherent receiver, a pilot interference canceller cancels a received pilot signal from the J channel code of each of the received J multicode channels prior to forming the decorrelator output vector.

摘要翻译： 多码（MC）码分多址（CDMA）接收机通过L多个空中信号路径（其中L> 1）接收J个编码多码信道（其中J> 1），并形成去相关器输出向量，其中对于每个J多码 通道，其他J-1多通道通道造成的干扰已被取消。 当MC CDMA接收机是相干接收机时，导频干扰消除器在形成去相关器输出向量之前，从接收的每个J多码信道的J信道码中取消接收的导频信号。

公开(公告)号：US6069883A

公开(公告)日：2000-05-30

申请号：US841980

申请日：1997-04-08

申请人： Richard Paul Ejzak ,  Subhasis Laha ,  Sarath Kumar ,  Douglas Knisely ,  Sanjiv Nanda ,  Chih-Lin I

发明人： Richard Paul Ejzak ,  Subhasis Laha ,  Sarath Kumar ,  Douglas Knisely ,  Sanjiv Nanda ,  Chih-Lin I

IPC分类号： H04J13/04 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W28/22 ,  H04W36/18 ,  H04W72/08 ,  H04W74/00 ,  H04J13/02

CPC分类号： H04W28/22 ,  H04B2201/70703 ,  H04W36/18 ,  H04W72/082

摘要： A code division multiple access system method and apparatus provides for allocation of increased bandwidth to a requesting mobile station. An access controller receives a data burst request (from either a requesting mobile station or from an external network already in connection with the mobile station) requesting a first data rate in excess of the basic data rate B allocated to a mobile station of a first cell. The access controller determines an increased data rate which is to be granted to said mobile station without causing excessive interference at said first cell and at least one adjacent cell and transmits a data burst assignment to a base station of said first cell indicating the increased data rate which has been granted to said mobile station. In another feature, the access controller processes a data burst request received from a mobile station involved in a soft handoff between multiple base stations and negotiates with those base stations for an increased data rate which may be granted to the requesting mobile station. One feature enables additional interactions to further refine the allocation process. A variety of system architectures are also described.

摘要翻译： 码分多址系统方法和装置提供增加带宽的分配给请求移动台。 访问控制器从请求的移动站或已经与移动站连接的外部网络接收请求超过分配给第一小区的移动站的基本数据速率B的第一数据速率的数据突发请求 。 访问控制器确定要被授予所述移动站的增加的数据速率，而不会在所述第一小区和至少一个相邻小区造成过多的干扰，并且向所述第一小区的基站发送指示增加的数据速率的数据突发分配 其被授予所述移动台。 在另一特征中，接入控制器处理从涉及多个基站之间的软切换的移动台接收到的数据突发请求，并与那些基站协商以增加可能被授权给请求移动台的数据速率。 一个功能可以实现其他交互以进一步完善分配过程。 还描述了各种系统架构。

公开(公告)号：US6067292A

公开(公告)日：2000-05-23

申请号：US841316

申请日：1997-04-30

申请人： Howard C. Huang ,  Chih-Lin I ,  Stephan ten Brink ,  Giovanni Vannucci

发明人： Howard C. Huang ,  Chih-Lin I ,  Stephan ten Brink ,  Giovanni Vannucci

IPC分类号： H04B1/707 ,  H04B7/26 ,  H04L7/00 ,  H04J13/00

CPC分类号： H04B1/7107 ,  H04B1/71072 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/712 ,  H04B2001/71077 ,  H04B2201/70701 ,  H04B2201/70709

摘要： A Code-Division Multiple Access (CDMA) receiver removes the pilot signal from the received signal. The pilot signal is defined by its multipath parameters (amplitudes, phase shift and delays) and its signature sequence. Since this information is known at the user's receiver terminal (i.e., handset), the pilot signals of the interfering multipath components of the baseband received signal are detected and removed prior to demodulation of the desired multipath component. The pilot signal may be cancelled prior to or following the data accumulation stage. The pilot signal cancellation can be switched on and off depending on the detected path signal level.

摘要翻译： 码分多址（CDMA）接收机从接收信号中去除导频信号。 导频信号由其多径参数（幅度，相移和延迟）及其签名序列定义。 由于该信息在用户的接收机终端（即，手机）处是已知的，所以在解调期望的多路径分量之前检测和去除基带接收信号的干扰多径分量的导频信号。 可以在数据累积阶段之前或之后取消导频信号。 导频信号消除可以根据检测到的路径信号电平进行接通和关断。

公开(公告)号：US5870378A

公开(公告)日：1999-02-09

申请号：US700262

申请日：1996-08-20

申请人： Howard C. Huang ,  Chih-Lin I ,  Stephan ten Brink ,  Charles Albert Webb, III

发明人： Howard C. Huang ,  Chih-Lin I ,  Stephan ten Brink ,  Charles Albert Webb, III

IPC分类号： H04B1/707 ,  H04B1/709 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04J13/021 ,  H04B7/216

CPC分类号： H04B1/709 ,  H04B1/707 ,  H04J13/0048 ,  H04J13/10

摘要： A Multi-Code (MC) Code Division Multiple Access (CDMA) receiver receives N (where N.gtoreq.1) encoded signal channels over multiple air signal paths. The N signal channels are encoded using a properly chosen subset of Walsh codes based on a Walsh-Matrix, W.sup.M, where M is a power of two. In the disclosed MC-CDMA receiver, a timing correlator means recovers the timing and control signal for the N signal channels received over any particular signal path; a FWHT circuit together with a second correlator means decodes all of the N signal channels.

摘要翻译： 多码（MC）码分多址（CDMA）接收机在多个空中信号路径上接收N（其中N> / = 1）个编码信号信道。 使用基于Walsh-Matrix，WM的适当选择的沃尔什码的子集对N个信号信道进行编码，其中M是2的幂。 在公开的MC-CDMA接收机中，定时相关器装置恢复通过任何特定信号路径接收的N个信号信道的定时和控制信号; 与第二相关器一起的FWHT电路意味着解码所有N个信号信道。

公开(公告)号：US5734646A

公开(公告)日：1998-03-31

申请号：US539476

申请日：1995-10-05

申请人： Chih-Lin I ,  Sanjiv Nanda

发明人： Chih-Lin I ,  Sanjiv Nanda

IPC分类号： H04J13/04 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W28/22 ,  H04W36/18 ,  H04W72/08 ,  H04W74/00 ,  H04T13/00

CPC分类号： H04W28/22 ,  H04B2201/70703 ,  H04W36/18 ,  H04W72/082

摘要： A code division multiple access system provides a way of allocating an increased data rate to a requesting mobile station. A mobile station requesting a data rate in excess of the basic data rate sends received pilot strength data for its base station and base stations in adjacent cells. The received pilot strength data is used to determine an increased data rate to be assigned to the requesting mobile station. One feature assigns an increased data rate when the received pilot strength data has a predetermined relationship to an established threshold. Another feature utilizes a series of threshold levels, each pair of levels associated with a different permitted data rate. Using the received pilot strength data, a data rate is determined which satisfies all adjacent cell interference concerns. Another feature uses average adjacent cell capacity loads rather than threshold levels, together with the received pilot strength data, to determine the appropriate increased data rate to be assigned to a user requesting an increased data rate.

摘要翻译： 码分多址系统提供了一种将增加的数据速率分配给请求移动台的方式。 请求超过基本数据速率的数据速率的移动台将其基站和基站的接收导频强度数据发送到相邻小区。 所接收的导频强度数据用于确定要分配给请求移动台的增加的数据速率。 当接收的导频强度数据与已建立的阈值具有预定的关系时，一个特征分配增加的数据速率。 另一个特征使用一系列阈值级别，每对级别与不同的允许数据速率相关联。 使用接收到的导频强度数据，确定满足所有相邻小区干扰关系的数据速率。 另一个特征使用平均相邻小区容量负载而不是阈值水平以及接收到的导频强度数据来确定要分配给请求增加的数据速率的用户的适当增加的数据速率。

公开(公告)号：US5671218A

公开(公告)日：1997-09-23

申请号：US234757

申请日：1994-04-28

申请人： Chih-Lin I ,  Krishan Kumar Sabnani

发明人： Chih-Lin I ,  Krishan Kumar Sabnani

IPC分类号： H04B7/005 ,  H04B7/26 ,  H04J15/00 ,  H04W52/26 ,  H04W52/28 ,  H04B7/216 ,  H04J13/02

CPC分类号： H04W52/265 ,  H04W52/267 ,  H04W52/288

摘要： The invention relates to the use of CDMA techniques. Data signals to be transmitted from a plurality of wireless devices are spread across a common bandwidth. The data signals are received by a base station as a composite spread signal. The base station partially despreads the composite spread signal with unique codes to extract data signals from individual wireless devices. The data rate and quality of service requirements for each wireless device are used to calculate a power factor and a control signal is sent to control the power from a particular wireless device. In addition, a probability of transmission value is calculated based on an equivalent current load value and an equivalent population value. The probability of transmission value determines whether a particular wireless device is allowed access to an uplink frequency channel.

摘要翻译： 本发明涉及CDMA技术的应用。 要从多个无线设备发送的数据信号在公共带宽上扩展。 数据信号由基站作为复合扩展信号接收。 基站用独特的代码部分地解扩复合扩展信号，以从各个无线设备提取数据信号。 使用每个无线设备的数据速率和服务质量要求来计算功率因数，并且发送控制信号以控制来自特定无线设备的功率。 此外，基于等效电流负载值和等效总体值计算发送价值的概率。 传输值的概率确定特定的无线设备是否允许访问上行链路频道。

公开(公告)号：US5577168A

公开(公告)日：1996-11-19

申请号：US377291

申请日：1995-01-23

申请人： Zygmunt Haas ,  Chih-Lin I

发明人： Zygmunt Haas ,  Chih-Lin I

IPC分类号： H04L12/56 ,  H04W36/08 ,  H04Q7/22

CPC分类号： H04W36/0055 ,  H04W72/0406 ,  Y02B60/50

摘要： A packetized cellular system in which a mobile quasi-periodically transmits a beacon signal containing an ID number to a first base station in the cell in which it is located for storage with the ID's of other active mobiles in the cell. A copy of a list of the active mobiles in that cell is transmitted to all adjacent cells where they are placed on non-active list. Control of a mobile is handed-off to a second base station upon the receipt of a transmitted ID number of the mobile at the second base station. The mobile is then listed as active in the database of the second base station and non-active in the first base station.

摘要翻译： 一种分组化的蜂窝系统，其中移动设备准周期性地将包含ID号码的信标信号发送到其所在的小区中的第一基站，以与该小区中的其他主动移动台的ID一起存储。 在该单元中的活动移动台的列表的副本被发送到所有相邻的单元，它们被放置在非活动列表上。 在第二基站接收到所发送的移动台的ID号码时，将移动台的控制切换到第二基站。 移动台然后在第二基站的数据库中被列为活动的，并且在第一基站中是非活动的。

公开(公告)号：US5276730A

公开(公告)日：1994-01-04

申请号：US876554

申请日：1992-04-30

申请人： Leonard J. Cimini, Jr. ,  Gerard J. Foschini ,  Chih-Lin I

发明人： Leonard J. Cimini, Jr. ,  Gerard J. Foschini ,  Chih-Lin I

IPC分类号： H04W16/10 ,  H04M11/00 ,  H04Q7/00

CPC分类号： H04W16/10 ,  H04W24/00 ,  H04W72/00 ,  H04W72/02 ,  H04W72/04 ,  H04W72/082

摘要： A method of providing local autonomous control of channel allocation of a cellular telecommunications network. In one prior art method, which can be identified as the timid method, a channel is selected for use by an incoming user if it is not being used by any of the cells which surround it. Otherwise, another channel is selected according to the same rule. The channels are tested in random order and a call is blocked if all of the channels are in use. For heavy loading, because of the vagaries of the way the demand for channels occurs, this method can result in inefficient channel deployment. In another method, which can be identified as the aggressive method, a channel is selected for use by an incoming user even if that channel is currently being used in the surrounding cells. If the channel is in use, the incoming user "bumps" the current user off the channel in the timid mode. The "bumped" user is then forced to find and use another channel. With this method, an unreasonable number of reconfigurations and an unreasonable number of dropped calls can result, especially when the system is heavily loaded. This invention integrates the aggressive and timid methods to obtain the best of both: the former's improved performance and the latter's stability. Initially, the timid mode is used to look for a channel with acceptable interference. However, if the timid mode fails to obtain a channel, the call is not necessarily blocked. Instead, the mode of operation becomes more aggressive and the first channel tested that has only modest interference is taken. The "bumped" user on that channel then attempts to locate another channel. If the "bumped" user is unsuccessful, the incoming user must then retreat and is blocked.

摘要翻译： 一种提供蜂窝电信网络的信道分配的本地自主控制的方法。 在可以被识别为胆小的方法的一种现有技术方法中，如果入口用户没有被其周围的任何小区使用，则选择频道用于使用。 否则，根据相同的规则选择另一个频道。 频道按照随机顺序进行测试，如果所有频道都在使用中，通话将被阻止。 对于繁重的负荷，由于频道需求的变化，这种方式可能导致信道部署效率低下。 在可以被识别为侵略性方法的另一种方法中，选择频道以供入局用户使用，即使该频道当前正在周围小区中使用。 如果频道正在使用中，进入的用户将以当前用户的“嘀嗒”模式将“当前用户”从“通道”中消失。 然后，“碰撞”用户被迫找到并使用另一个频道。 使用这种方法，可能导致不合理的数量的重新配置和不合理的掉话数量，特别是当系统负载过重时。 本发明整合了积极和胆小的方法，以获得最佳的两者：前者的改进性能和后者的稳定性。 最初，胆小的模式用于寻找具有可接受干扰的信道。 但是，如果没有获得通道，则呼叫不一定被阻止。 相反，操作模式变得更加积极，并且仅采用适度干扰的第一通道测试。 该通道上的“碰撞”用户尝试找到另一个频道。 如果“碰撞”用户不成功，则进入的用户必须撤退并被阻止。

公开(公告)号：US08014981B2

公开(公告)日：2011-09-06

申请号：US12128729

申请日：2008-05-29

申请人： Peter Wing Chau Chan ,  Derek Chun Kit Lee ,  Roger Shu Kwan Cheng ,  Chih-Lin I

发明人： Peter Wing Chau Chan ,  Derek Chun Kit Lee ,  Roger Shu Kwan Cheng ,  Chih-Lin I

IPC分类号： G06F7/60 ,  G06F17/50

CPC分类号： H04L25/0242 ,  H04L25/0256

摘要： A method of modeling wireless communication channels in angular domain is disclosed. The method includes considering radiation patterns 101, 102 of the transmitter antenna and the receiver antenna, wherein the radiation patterns are represented by antenna characteristics sampled at a plurality of angular directions. A method of channel estimation based on the method of modeling wireless communication channel in angular domain is also disclosed.

摘要翻译： 公开了一种在角域中建模无线通信信道的方法。 该方法包括考虑发射机天线和接收机天线的辐射图案101,102，其中辐射图案由在多个角度方向上采样的天线特性表示。 还公开了一种基于角域中无线通信信道建模方法的信道估计方法。