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1. 发明申请

US20090147872A1 METHOD OF RANGING SIGNAL DESIGN AND TRANSMISSION FOR MIMO-OFDMA INITIAL RANGING PROCESS 有权
标题翻译： MIMO-OFDMA初始测距过程的信号设计和传输方法
公开(公告)号：US20090147872A1
公开(公告)日：2009-06-11
申请号：US12277110
申请日：2008-11-24
申请人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04L27/28 , H04J1/00
CPC分类号： H04J3/0682 , H04J13/16 , H04L5/0007 , H04L27/2613 , H04L27/2626 , H04L27/2655 , H04L27/2684
摘要： A mobile communication system uses a multiple-input-multiple-output (MIMO) technology with an orthogonal frequency division multiplexing access (OFDMA) scheme. Multiuser diversity, multiantenna diversity, and power control since the first ranging attempt are exploited in the initial ranging process. At network entry, an initial ranging method selects from multiple ranging signal designs to accomplish the initial ranging process. In one embodiment, three classes of ranging signal designs may be selected for use in generating ranging codes. The information on the ranging signal design to be used, which is selected by the base station based on the cell size of the communication system (i.e., the radio coverage area of the base station), is broadcast from the BS. The ranging signal designs are directly applicable to single-antenna systems, and they are applied to MIMO systems by using appropriate mapping across transmit antennas based on the adopted MIMO ranging transmission scheme. In a mobile communication system using MIMO technology with the OFDMA scheme, the ranging user selects from multiple ranging transmission schemes of different levels of computation complexity, power consumption and performance. In one example, optimum eigenmode and suboptimum eigenmode transmission schemes provide the best performance at high computational complexity and high power consumption. A simpler single-antenna selection transmission scheme provides significantly reduces computational complexity and achieves power saving at a marginal degradation in system performance.
摘要翻译：移动通信系统使用具有正交频分复用接入（OFDMA）方案的多输入多输出（MIMO）技术。多用户分集，多天线分集和功率控制，因为在初始测距过程中被利用。在网络入口处，初始测距方法从多个测距信号设计中选择，以完成初始测距过程。在一个实施例中，可以选择三类测距信号设计用于产生测距码。从基站通过基站根据通信系统的小区大小（即，基站的无线覆盖区域）选择的要使用的测距信号设计的信息。测距信号设计直接适用于单天线系统，并且通过基于所采用的MIMO测距传输方案，通过使用跨发射天线的适当映射将其应用于MIMO系统。在采用OFDMA方式的MIMO技术的移动通信系统中，测距用户从不同层次的计算复杂度，功耗和性能的多个测距传输方案中进行选择。在一个示例中，最佳本征模式和次优本征模式传输方案在高计算复杂度和高功耗下提供最佳性能。更简单的单天线选择传输方案显着降低了计算复杂度并且在系统性能的微弱降级下实现了功率节省。

2. 发明授权

US08107428B2 Method of ranging signal design and transmission for MIMO-OFDMA initial ranging process 有权
标题翻译： MIMO-OFDMA初始测距过程的测距信号设计和传输方法
公开(公告)号：US08107428B2
公开(公告)日：2012-01-31
申请号：US12277110
申请日：2008-11-24
申请人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04W4/00 , H04J11/00 , H04L27/28
CPC分类号： H04J3/0682 , H04J13/16 , H04L5/0007 , H04L27/2613 , H04L27/2626 , H04L27/2655 , H04L27/2684
摘要： A mobile communication system uses a multiple-input-multiple-output (MIMO) technology with an orthogonal frequency division multiplexing access (OFDMA) scheme. At network entry, an initial ranging method selects from multiple ranging signal designs to accomplish the initial ranging process. Three classes of ranging signal designs may be selected for use in generating ranging codes. The information on the ranging signal design to be used, which is selected by the base station based on the cell size of the communication system (i.e., the radio coverage area of the base station), is broadcast from the BS. The ranging signal designs are directly applicable to single-antenna systems, and they are applied to MIMO systems by using appropriate mapping across transmit antennas based on the adopted MIMO ranging transmission scheme. Optimum eigenmode and suboptimum eigenmode transmission schemes provide the best performance at high computational complexity and high power consumption.
摘要翻译：移动通信系统使用具有正交频分复用接入（OFDMA）方案的多输入多输出（MIMO）技术。在网络入口处，初始测距方法从多个测距信号设计中选择，以完成初始测距过程。可以选择三类测距信号设计用于生成测距码。从基站通过基站根据通信系统的小区大小（即，基站的无线覆盖区域）选择的要使用的测距信号设计的信息。测距信号设计直接适用于单天线系统，并且通过基于所采用的MIMO测距传输方案，通过使用跨发射天线的适当映射将其应用于MIMO系统。最佳本征模式和次优本征模式传输方案在高计算复杂度和高功耗下提供最佳性能。

3. 发明授权

US08194623B2 Evolving-type user resource structure/channelization with enhanced diversity for OFDMA based time-varying channels 有权
标题翻译：用于基于OFDMA的时变频道的增强分集的演进型用户资源结构/信道化
公开(公告)号：US08194623B2
公开(公告)日：2012-06-05
申请号：US12455268
申请日：2009-05-28
申请人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
发明人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
IPC分类号： H04W74/00
CPC分类号： H04B7/12 , H04B7/0452
摘要： An evolving-type resource structure supports high data rate services at high mobile speeds. The evolving-type resource structure is an efficient diversity-exploiting user resource structure for fast time-varying frequency-selective fading channel environments. In one example, an evolving-type resource structure takes advantages of both band-type and interleaved-type structures which exploit both multiuser diversity and frequency diversity in fast time-varying channels. The evolving-type resource structure is applicable to centralized, semi-distributed and distributed access schemes and may be used in both downlink (DL) and uplink (UL) transmissions in a cellular system.
摘要翻译：演进型资源结构支持高移动速度的高数据速率业务。演进型资源结构是用于快速时变频率选择性衰落信道环境的有效的分集利用用户资源结构。在一个示例中，演进型资源结构利用在快速时变信道中利用多用户分集和频率分集两者的带式和交织型结构的优点。演进型资源结构适用于集中式，半分布式和分布式访问方案，并可用于蜂窝系统中的下行链路（DL）和上行链路（UL）传输。

4. 发明申请

US20100118826A1 Evolving-type user resource structure/channelization with enhanced diversity for OFDMA based time-varying channels 有权
标题翻译：用于基于OFDMA的时变频道的增强分集的演进型用户资源结构/信道化
公开(公告)号：US20100118826A1
公开(公告)日：2010-05-13
申请号：US12455268
申请日：2009-05-28
申请人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
发明人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
IPC分类号： H04W72/04
CPC分类号： H04B7/12 , H04B7/0452
摘要： An evolving-type resource structure supports high data rate services at high mobile speeds. The evolving-type resource structure is an efficient diversity-exploiting user resource structure for fast time-varying frequency-selective fading channel environments. In one example, an evolving-type resource structure takes advantages of both band-type and interleaved-type structures which exploit both multiuser diversity and frequency diversity in fast time-varying channels. The evolving-type resource structure is applicable to centralized, semi-distributed and distributed access schemes and may be used in both downlink (DL) and uplink (UL) transmissions in a cellular system.
摘要翻译：演进型资源结构支持高移动速度的高数据速率业务。演进型资源结构是用于快速时变频率选择性衰落信道环境的有效的分集利用用户资源结构。在一个示例中，演进型资源结构利用在快速时变信道中利用多用户分集和频率分集两者的带式和交织型结构的优点。演进型资源结构适用于集中式，半分布式和分布式访问方案，并可用于蜂窝系统中的下行链路（DL）和上行链路（UL）传输。

5. 发明授权

US08218420B2 Non-cyclic evolving-type user resource structure for OFDMA based system with null guard tones 有权
标题翻译：具有空保护音的基于OFDMA的系统的非循环演进型用户资源结构
公开(公告)号：US08218420B2
公开(公告)日：2012-07-10
申请号：US12620422
申请日：2009-11-17
申请人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
发明人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
IPC分类号： H04W4/00
CPC分类号： H04W72/044 , H04W24/00 , H04W28/06 , H04W72/00
摘要： A non-cyclic evolving-type user resource structure applicable for use in the uplink and the downlink of an OFDMA system with large null guard tones (e.g., a 3GPP LTE system) is provided. In one example, the user resource structure combines the benefits of localized and distributed types of resource structures available in the current baseline 3GPP LTE (Release 8) specifications, and is especially suitable for operating in a fast time-varying channel. In another example, the non-cyclic evolving-type resource structure may be simplified to have no more than three stages: a band-type first stage, a partially evolved-type second stage and an interleaved-type third stage. Depending upon the target or average mobile speed and packet length, the resource structure may even have less than three stages.
摘要翻译：提供了适用于具有大的空保护音调（例如，3GPP LTE系统）的OFDMA系统的上行链路和下行链路中的非循环演进型用户资源结构。在一个示例中，用户资源结构组合了当前基准3GPP LTE（版本8）规范中可用的本地化和分布式资源结构的优点，并且特别适用于在快速时变信道中操作。在另一示例中，可以将非循环演进型资源结构简化为具有不超过三个阶段：频带型第一级，部分演进型第二级和交错型第三级。根据目标或平均移动速度和分组长度，资源结构甚至可能具有不到三个阶段。

6. 发明申请

US20100246505A1 NON-CYCLIC EVOLVING-TYPE USER RESOURCE STRUCTURE FOR OFDMA BASED SYSTEM WITH NULL GUARD TONES 有权
标题翻译：基于OFDMA系统的非循环演进型用户资源结构
公开(公告)号：US20100246505A1
公开(公告)日：2010-09-30
申请号：US12620422
申请日：2009-11-17
申请人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
发明人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
IPC分类号： H04W72/04
CPC分类号： H04W72/044 , H04W24/00 , H04W28/06 , H04W72/00
摘要： A non-cyclic evolving-type user resource structure applicable for use in the uplink and the downlink of an OFDMA system with large null guard tones (e.g., a 3GPP LTE system) is provided. In one example, the user resource structure combines the benefits of localized and distributed types of resource structures available in the current baseline 3GPP LTE (Release 8) specifications, and is especially suitable for operating in a fast time-varying channel. In another example, the non-cyclic evolving-type resource structure may be simplified to have no more than three stages: a band-type first stage, a partially evolved-type second stage and an interleaved-type third stage. Depending upon the target or average mobile speed and packet length, the resource structure may even have less than three stages.
摘要翻译：提供了适用于具有大的空保护音调（例如，3GPP LTE系统）的OFDMA系统的上行链路和下行链路中的非循环演进型用户资源结构。在一个示例中，用户资源结构组合了当前基准3GPP LTE（版本8）规范中可用的本地化和分布式资源结构的优点，并且特别适用于在快速时变信道中操作。在另一示例中，可以将非循环演进型资源结构简化为具有不超过三个阶段：频带型第一级，部分演进型第二级和交错型第三级。根据目标或平均移动速度和分组长度，资源结构甚至可能具有不到三个阶段。

7. 发明申请

US20110085504A1 ADAPTIVE BEAM-FORMING AND SPACE-FREQUENCY BLOCK CODING TRANSMISSION SCHEME FOR MIMO-OFDMA SYSTEMS 审中-公开
标题翻译： MIMO-OFDMA系统的自适应波束形成和空间编码传输方案
公开(公告)号：US20110085504A1
公开(公告)日：2011-04-14
申请号：US12899394
申请日：2010-10-06
申请人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
发明人： Chia-Chin Chong , Hlaing Minn , Fujio Watanabe
IPC分类号： H04W72/00
CPC分类号： H04W72/085 , H04L1/0606 , H04L5/0007 , H04L25/0204 , H04L25/0224
摘要： In a wireless communication system including a base station and multiple mobile stations, a method transmits an orthogonal frequency division multiple access (OFDMA) data frame to the mobile stations. The method includes the steps of (a) at the beginning of the data frame, collecting metrics representing channel conditions for each of the channels; (b) assigning each mobile station to one or more communication channels based on the metrics collected; (c) for each symbol in the frame, calculating an average bit-error-rate for each of a number of transmission modes, and assigning to that symbol the transmission mode corresponding to the lowest calculated average bit-error-rate for that symbol; and (d) transmitting the symbols in the frame according to their respective assigned transmission mode. In addition, a bit-loading optimization step may be carried out in conjunction with the method to determine a modulation order for each symbol to be transmitted.
摘要翻译：在包括基站和多个移动站的无线通信系统中，方法向移动台发送正交频分多址（OFDMA）数据帧。该方法包括以下步骤：（a）在数据帧的开头，收集表示每个信道的信道条件的度量; （b）基于收集的度量将每个移动台分配给一个或多个通信信道; （c）对于帧中的每个符号，计算多个传输模式中的每一个的平均误码率，并且向该符号分配与该符号的最低计算的平均误码率相对应的传输模式; 以及（d）根据各自的分配传输模式在帧中发送符号。此外，可以结合用于确定要发送的每个符号的调制阶数的方法来执行比特加载优化步骤。

8. 发明申请

US20090116419A1 METHOD AND SYSTEM OF THRESHOLD SELECTION FOR RELIABLE RELAY STATIONS GROUPING FOR DOWNLINK TRANSMISSION 审中-公开
标题翻译：用于下行链路传输分组的可靠继电器的阈值选择方法和系统
公开(公告)号：US20090116419A1
公开(公告)日：2009-05-07
申请号：US12257325
申请日：2008-10-23
申请人： Chia-Chin Chong , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04H20/71
CPC分类号： H04B7/024 , H04B7/15592 , H04W16/26
摘要： A relaying selection and cooperative communications method provides a threshold selection criterion for forming a reliable group of relay stations (RSs) based on one or more design criteria. Possible design criteria include an outage probability constraint and a throughput constraint. The threshold value is selected according to, for example, transmission paths (e.g., line-of-sight, obstructed-light-of-sight, non-light-of-sight) or channel conditions (e.g., signal-to-noise-ratio) between the base station (BS) and the RSs (i.e., BS-RSs link) and between the RSs and the mobile station (MS) (i.e., RSs-MS link), respectively.
摘要翻译：中继选择和协作通信方法基于一个或多个设计标准提供用于形成可靠的中继站组（RS）的阈值选择准则。可能的设计标准包括中断概率约束和吞吐量约束。根据例如传输路径（例如，视线，被遮蔽的视野，不可见光）或信道条件（例如，信噪比）来选择阈值，基站（BS）和RS（即BS-RS链路）之间以及RS和移动台（MS）之间的RS（比例）比率）（即，RSs-MS链路）。

9. 发明授权

US08208587B2 Method and system for joint time-of-arrival and amplitude estimation based on a super-resolution technique 有权
标题翻译：基于超分辨率技术的联合到达时间和幅度估计的方法和系统
公开(公告)号：US08208587B2
公开(公告)日：2012-06-26
申请号：US12106188
申请日：2008-04-18
申请人： Chia-Chin Chong , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H03D1/00 , H04L27/06
CPC分类号： H04L25/0202 , G01S3/043 , G01S5/0215 , G01S5/0221 , G01S11/02 , H04B1/7105 , H04B1/7107 , H04B1/7115
摘要： In a geolocation application, a method is provided to jointly estimate the time-of-arrival (TOA) and the amplitude of a received signal based on super-resolution technique. The super-resolution joint TOA-amplitude estimators are provided based on either the expectation-maximization (EM), parallel-interference-cancellation space-alternating generalized expectation maximization (PIC-SAGE) or serial-interference-cancellation SAGE (SIC-SAGE). The SIC-SAGE estimator minimizes the ranging estimation error especially under a non-line-of-sight (NLOS) condition. The SIC-SAGE estimator is a simplified version of the maximum likelihood estimator with more stable performance in a multipath rich environment, such as the ultra-wideband (UWB) based applications. These techniques provide the following benefits: 1) it is generic, so that signal processing can be deployed on both time-domain (e.g., UWB impulse-radio) and frequency-domain (e.g., multi-band orthogonal frequency-division multiplexing (MB-OFDM)) based transceiver schemes and applicable for both UWB and non-UWB systems; 2) it is robust especially under NLOS condition and multipath rich environment.
摘要翻译：在地理位置应用中，提供了一种基于超分辨率技术共同估计接收信号的时间（TOA）和接收信号幅度的方法。基于期望最大化（EM），并行干扰消除空间交替广义期望最大化（PIC-SAGE）或串行干扰消除SAGE（SIC-SAGE）提供超分辨率联合TOA幅度估计器，。 SIC-SAGE估计器最小化了测距估计误差，特别是在非视距（NLOS）条件下。 SIC-SAGE估计器是最大似然估计器的简化版本，在富路由多环境中具有更稳定的性能，例如基于超宽带（UWB）的应用。这些技术提供以下优点：1）它是通用的，使得信号处理可以在时域（例如，UWB脉冲无线电）和频域上部署（例如，多频带正交频分复用（MB -OFDM））收发器方案，适用于UWB和非UWB系统; 2）特别是在NLOS条件和多路径丰富的环境下，它是强大的。

10. 发明申请

US20080188253A1 METHOD AND SYSTEM FOR WIRELESS DESIGN SUBJECT TO INTERFERENCE CONSTRAINTS 审中-公开
标题翻译：用于干扰约束的无线设计的方法和系统
公开(公告)号：US20080188253A1
公开(公告)日：2008-08-07
申请号：US12019562
申请日：2008-01-24
申请人： Chia-Chin Chong , Pedro C. Pinto , Moe Z. Win , Fujio Watanabe , Hiroshi Inamura
发明人： Chia-Chin Chong , Pedro C. Pinto , Moe Z. Win , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04B15/00 , H04B7/00
CPC分类号： H04W16/22
摘要： A wireless communication system experience interference from other wireless communication networks. A method for designing wireless communication systems subject to interference is proposed based on a realistic interference model which accounts for the propagation effects introduced by the wireless environment (such as path loss, shadowing, and multipath fading), and for the spatial scattering of transmitters (using a Poisson field). The method accounts for tradeoffs between network parameters, such as signal-to-noise ratio (SNR), interference-to-noise ratio (INR), path loss exponent, spatial density of the interferers, and error probability. Advantages of this method include: 1) a unified framework for designing a wireless system, subject to cumulative interference and noise, incorporating a wide range of performance metrics; and 2) a general application that covers a broad class of wireless communication systems and channel fading distributions.
摘要翻译：无线通信系统经受来自其他无线通信网络的干扰。提出了一种用于设计受干扰的无线通信系统的方法，该实际干扰模型考虑了由无线环境引入的传播效应（如路径损耗，阴影和多径衰落）以及发射机的空间散射（使用泊松场）。该方法考虑了网络参数之间的折衷，如信噪比（SNR），干扰信噪比（INR），路径损耗指数，干扰源的空间密度和误差概率。该方法的优点包括：1）设计无线系统的统一框架，受到累积干扰和噪声的影响，并结合广泛的性能指标; 和2）涵盖广泛类别的无线通信系统和信道衰落分布的通用应用。

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