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81. 发明授权

US08761312B2 Selection of a thresholding parameter for channel estimation 失效
标题翻译：选择信道估计的阈值参数
公开(公告)号：US08761312B2
公开(公告)日：2014-06-24
申请号：US11351683
申请日：2006-02-10
申请人： Anastasios Stamoulis , Durga Prasad Malladi
发明人： Anastasios Stamoulis , Durga Prasad Malladi
IPC分类号： H04L27/06
CPC分类号： H04L27/2647 , H04L25/0204 , H04L25/0212 , H04L25/0228 , H04L25/025 , H04L25/0256 , H04L25/0258 , H04L27/261
摘要： Techniques for deriving a high quality channel estimate are described. A first channel impulse response estimate (CIRE) having multiple channel taps is derived, e.g., by filtering initial CIREs obtained from a received pilot. A threshold parameter value is selected based on at least one criterion, which may relate to channel profile, operating SNR, number of channel taps, and so on. A second CIRE is derived by zeroing out selected ones of the channel taps in the first CIRE based on the threshold parameter value. The average energy of the channel taps may be determined, a threshold may be derived based on the average energy and the threshold parameter value, and channel taps with energy less than the threshold may be zeroed out. A memory may store threshold parameter values for different operating scenarios, and a stored value may be selected for use based on the current operating scenario.
摘要翻译：描述了用于导出高质量信道估计的技术。具有多信道抽头的第一信道脉冲响应估计（CIRE）被导出，例如通过对从接收到的导频获得的初始CIRE进行滤波。基于至少一个标准来选择阈值参数值，其可以涉及信道简档，操作SNR，信道抽头数等。基于阈值参数值，通过对第一CIRE中的选通信道抽头进行归零而得到第二CIRE。可以确定通道抽头的平均能量，可以基于平均能量和阈值参数值导出阈值，并且可以将能量小于阈值的通道抽头清零。存储器可以存储不同操作场景的阈值参数值，并且可以基于当前操作场景选择使用存储的值。

82. 发明授权

US08687617B2 Wireless communication system with improved broadcast coverage 有权
标题翻译：无线通信系统具有改进的广播覆盖
公开(公告)号：US08687617B2
公开(公告)日：2014-04-01
申请号：US12480928
申请日：2009-06-09
申请人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04B7/208
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g., W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM, and the waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna.
摘要翻译：描述了使用循环延迟分集和飞行员交错传输数据的技术。对于循环延迟分集，生成具有不同循环延迟持续时间的OFDM符号。 OFDM符号的循环延迟持续时间可以被选择为相对于由相邻基站发送的OFDM符号的循环延迟持续时间而变化的时间。在不同符号周期的多组子带上生成和复用FDM导频。可以生成用于第二无线电技术（例如，W-CDMA）的波形，用于使用该无线电技术发送的数据。 OFDM符号被复用到用于OFDM的时隙上，并且用于第二无线电技术的波形被复用到用于该无线电技术的时隙上。可以基于多路复用的OFDM符号和波形来生成一个或多个调制信号。每个调制信号从相应的天线发送。

83. 发明授权

US08588203B2 Wireless communication system with improved broadcast coverage 有权
标题翻译：无线通信系统具有改进的广播覆盖
公开(公告)号：US08588203B2
公开(公告)日：2013-11-19
申请号：US11144211
申请日：2005-06-02
申请人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04J3/18
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g., W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM, and the waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna.
摘要翻译：描述了使用循环延迟分集和飞行员交错传输数据的技术。对于循环延迟分集，生成具有不同循环延迟持续时间的OFDM符号。 OFDM符号的循环延迟持续时间可以被选择为相对于由相邻基站发送的OFDM符号的循环延迟持续时间而变化的时间。在不同符号周期的多组子带上生成和复用FDM导频。可以生成用于第二无线电技术（例如，W-CDMA）的波形，用于使用该无线电技术发送的数据。 OFDM符号被复用到用于OFDM的时隙上，并且用于第二无线电技术的波形被复用到用于该无线电技术的时隙上。可以基于多路复用的OFDM符号和波形来生成一个或多个调制信号。每个调制信号从相应的天线发送。

84. 发明授权

US08577299B2 Wireless communication system with configurable cyclic prefix length 有权
标题翻译：具有可配置循环前缀长度的无线通信系统
公开(公告)号：US08577299B2
公开(公告)日：2013-11-05
申请号：US11144181
申请日：2005-06-02
申请人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04B1/00
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： To transmit data in a manner to mitigate the deleterious effects of delay spread, the expected coverage areas for multiple transmissions to be sent in multiple time slots are initially determined. Cyclic prefix lengths for these transmissions are selected based on the expected coverage areas. The cyclic prefix length for each transmission may be selected from among a set of allowed cyclic prefix lengths based on the expected coverage area for that transmission, the pilot staggering used for the transmission, and so on. For example, a shorter cyclic prefix length may be selected for each local transmission, and a longer cyclic prefix length may be selected for each wide-area transmission. The selected cyclic prefix lengths may be signaled to the terminals. The transmissions are processed (e.g., OFDM modulated) based on the selected cyclic prefix lengths. The cyclic prefix lengths may be selected periodically, e.g., in each super-frame.
摘要翻译：为了以减轻延迟扩展的有害影响的方式发送数据，首先确定要在多个时隙中发送的多个传输的预期覆盖区域。基于预期的覆盖区域来选择这些传输的循环前缀长度。可以根据该传输的预期覆盖区域，用于传输的导频交错等，从一组允许的循环前缀长度中选择每个传输的循环前缀长度，等等。例如，可以为每个本地传输选择较短的循环前缀长度，并且可以为每个广域传输选择较长的循环前缀长度。所选择的循环前缀长度可以被发送到终端。基于所选择的循环前缀长度来处理（例如，OFDM调制）传输。可以周期性地选择循环前缀长度，例如在每个超帧中。

85. 发明授权

US08325863B2 Data detection and decoding with considerations for channel estimation errors due to guard subbands 有权
标题翻译：考虑到由于保护子带导致的信道估计误差的数据检测和解码
公开(公告)号：US08325863B2
公开(公告)日：2012-12-04
申请号：US11248975
申请日：2005-10-11
申请人： Anastasios Stamoulis , Dung N. Doan , Durga Prasad Malladi
发明人： Anastasios Stamoulis , Dung N. Doan , Durga Prasad Malladi
IPC分类号： H03D1/06
CPC分类号： H04L25/03318 , H04L25/0226 , H04L25/03171 , H04L25/03292
摘要： Techniques for performing data detection and decoding in a manner to account for guard subbands are described. A receiver obtains received pilot symbols for pilot subbands and received data symbols for data subbands. Channel estimates are derived based on the received pilot symbols with zeroed-out pilot subbands filled with zeros. Data detection is performed on the received data symbols with the channel estimates to obtain data symbol estimates. Estimates of noise and estimation errors due to the zeroed-out pilot subbands are derived. LLRs are then computed based on the data symbol estimates, the channel estimates, and the estimates of the noise and estimation errors. The LLRs are deinterleaved and decoded to obtain decoded data.
摘要翻译：描述了以考虑保护子带的方式执行数据检测和解码的技术。接收机获得用于导频子带的接收导频符号和用于数据子带的接收数据符号。基于接收到的导频符号导出信道估计，其中零导频子带填充零。对具有信道估计的接收数据符号执行数据检测以获得数据符号估计。导出由于零零导频子带导致的噪声和估计误差的估计。然后基于数据符号估计，信道估计以及噪声和估计误差的估计来计算LLR。 LLR被解交织并解码以获得解码数据。

86. 发明申请

US20120290720A1 SYSTEM AND METHOD FOR NETWORK MANAGEMENT 有权
标题翻译：网络管理系统与方法
公开(公告)号：US20120290720A1
公开(公告)日：2012-11-15
申请号：US13526752
申请日：2012-06-19
申请人： Anastasios Stamoulis , Arnab Chakrabarti , Dexu Lin , Kambiz Azarian Yazdi , Tingfang Ji
发明人： Anastasios Stamoulis , Arnab Chakrabarti , Dexu Lin , Kambiz Azarian Yazdi , Tingfang Ji
IPC分类号： H04W4/00
CPC分类号： H04W24/02 , H04W72/082
摘要： Various systems and methods for network management are disclosed. In one embodiment, a network management system comprises a receiver for receiving data from a plurality of entities, including base stations and/or subscriber handsets, a processor for generating a network map or a recommendation based on the received data, a display device for displaying the network map or recommendation, and a transmitter for transmitting instructions based on the recommendation.
摘要翻译：公开了用于网络管理的各种系统和方法。在一个实施例中，网络管理系统包括用于从包括基站和/或订户手机的多个实体接收数据的接收机，用于基于接收到的数据生成网络地图或推荐的处理器，用于显示网络地图或推荐，以及基于推荐发送指令的发送器。

87. 发明申请

US20120201158A1 PEER-TO-PEER / WAN ASSOCIATION CONTROL AND RESOURCE COORDINATION FOR MOBILE ENTITIES USING AGGREGATE NEIGHBORHOOD UTILITY METRICS 审中-公开
标题翻译：移动通信使用聚合邻域实现度量的对等/广域网协调控制和资源协调
公开(公告)号：US20120201158A1
公开(公告)日：2012-08-09
申请号：US13364271
申请日：2012-02-01
申请人： Stefan Geirhofer , Jaber Mohammad Borran , Anastasios Stamoulis , Siddhartha Mallik , Ravi Palanki , Naga Bhushan
发明人： Stefan Geirhofer , Jaber Mohammad Borran , Anastasios Stamoulis , Siddhartha Mallik , Ravi Palanki , Naga Bhushan
IPC分类号： H04W24/00 , H04W36/00
CPC分类号： H04W52/383 , H04W76/14 , H04W84/18
摘要： In a cellular wireless communication system, peer-to-peer (P2P) links between mobile devices are implemented, and controlled using an aggregate utility metric for a group of P2P and cellular links. A mobile node participating in a P2P link, or an eNB, may periodically broadcast an activity level indicator indicating a resource-dependent activity level of the link. The node may control the activity level in response to utility metrics received from members of neighboring P2P links to maximize an aggregate utility of the link and the neighboring P2P links sharing at least a subset of resources of a common frequency spectrum. Formation or termination of P2P links may be controlled in response to comparing a calculated achievable utility value to a current utility value of a link, and taking action calculated to maximize the aggregate utility value.
摘要翻译：在蜂窝无线通信系统中，实现移动设备之间的对等（P2P）链路，并且使用用于一组P2P和蜂窝链路的聚合效用度量进行控制。参与P2P链路的移动节点或eNB可以周期地广播指示链路的资源依赖活动级别的活动级别指示符。节点可以响应于从相邻P2P链路的成员接收到的效用度量来控制活动水平，以最大化链路的聚合效用和共享共同频谱的资源的至少一个子集的相邻P2P链路。可以响应于将计算的可实现效用值与链路的当前效用值进行比较，并且采取计算以最大化总效用值的动作来控制P2P链接的形成或终止。

88. 发明授权

US08102926B2 Method and apparatus for communication in a system employing differing transmission protocols 有权
标题翻译：在采用不同传输协议的系统中进行通信的方法和装置
公开(公告)号：US08102926B2
公开(公告)日：2012-01-24
申请号：US11234723
申请日：2005-09-23
申请人： Ashok Mantravadi , Durga Prasad Malladi , Avneesh Agrawal , Anastasios Stamoulis
发明人： Ashok Mantravadi , Durga Prasad Malladi , Avneesh Agrawal , Anastasios Stamoulis
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L25/0226 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/0058 , H04L12/189 , H04L25/0232 , H04L27/2601 , H04W52/32
摘要： A method and apparatus for communication in a system employing differing transmission protocols. It is determined whether a first time slot of one transmission protocol is adjacent to a second time slot of another transmission protocol, and if a first symbol within the first time slot is adjacent to a second symbol of the second time slot. A pilot power and/or a number of pilot sub-carriers or tones of the first symbol is increased and channel estimation is performed on the first symbol.
摘要翻译：一种采用不同传输协议的系统中的通信方法和装置。确定一个传输协议的第一时隙是否与另一传输协议的第二时隙相邻，并且如果第一时隙内的第一符号与第二时隙的第二符号相邻。导频功率和/或第一符号的导频子载波或音调数量增加，并对第一符号执行信道估计。

89. 发明授权

US07920884B2 Frame structures for a wireless communication system with multiple radio technologies 有权
标题翻译：具有多种无线电技术的无线通信系统的帧结构
公开(公告)号：US07920884B2
公开(公告)日：2011-04-05
申请号：US11144208
申请日：2005-06-02
申请人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04Q7/20 , H04Q7/00
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Frame structures and transmission techniques for a wireless communication system are described. In one frame structure, a super-frame includes multiple outer-frames, and each outer-frame includes multiple frames, and each frame includes multiple time slots. The time slots in each super-frame are allocated for downlink and uplink and for different radio technologies (e.g., W-CDMA and OFDM) based on loading. Each physical channel is allocated at least one time slot in at least one frame of each outer-frame in the super-frame. An OFDM waveform is generated for each downlink OFDM slot and multiplexed onto the slot. A W-CDMA waveform is generated for each downlink W-CDMA slot and multiplexed onto the slot. A modulated signal is generated for the multiplexed W-CDMA and OFDM waveforms and transmitted on the downlink. Each physical channel is transmitted in bursts. The slot allocation and coding and modulation for each physical channel can change for each super-frame.
摘要翻译：描述了用于无线通信系统的帧结构和传输技术。在一帧结构中，超帧包括多个外帧，并且每个外帧包括多个帧，并且每个帧包括多个时隙。基于加载，为每个超帧中的时隙分配给下行链路和上行链路以及不同的无线电技术（例如，W-CDMA和OFDM）。每个物理信道在超帧中的每个外帧的至少一个帧中分配至少一个时隙。为每个下行OFDM时隙生成OFDM波形并复用到时隙上。为每个下行链路W-CDMA时隙产生W-CDMA波形并复用到该时隙上。为多路复用的W-CDMA和OFDM波形生成调制信号并在下行链路上发送。每个物理信道以突发方式传输。每个物理信道的时隙分配和编码和调制可以针对每个超帧而改变。

90. 发明授权

US07173975B1 Estimation of a frequency selective channel in a MIMO environment with parameters that vary within a transmission block 有权
标题翻译：在具有在传输块内变化的参数的MIMO环境中估计频率选择信道
公开(公告)号：US07173975B1
公开(公告)日：2007-02-06
申请号：US10152609
申请日：2002-05-21
申请人： Naofal Al-Dhahir , Suhas N. Diggavi , Anastasios Stamoulis
发明人： Naofal Al-Dhahir , Suhas N. Diggavi , Anastasios Stamoulis
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04L27/2647 , H04B7/0851 , H04L1/0618 , H04L5/0023 , H04L5/0048 , H04L25/0226 , H04L25/0232 , H04L25/0242 , H04L2025/03414 , H04L2025/03426
摘要： In an environment where a block transmission takes place via a frequency selective channel that is characterized by channel parameters that change with time in the course of the transmission of a block, an arrangement employs pilot signals to ascertain some of the parameters, and estimates the remaining parameters through an interpolation process. In some embodiments, channel coefficients estimates are improved by employing estimates from previous blocks. In an OFDM system, the pilot signals are advantageously selected to be in clusters that are equally spaced from each other in the time or the frequency domains. This approach applies to multiple antennae arrangements, as well as to single antenna arrangements, and to arrangements that do, or do not, use space-time coding.
摘要翻译：在通过频率选择信道进行块传输的环境中，频率选择信道的特征在于在块的传输过程中随时间变化的信道参数，布置采用导频信号来确定一些参数，并且估计其余的参数通过插值过程。在一些实施例中，通过使用来自先前块的估计来改善信道系数估计。在OFDM系统中，导频信号有利地选择为在时域或频域中彼此相等间隔的簇。这种方法适用于多个天线布置以及单个天线布置，以及用于或不使用空时编码的布置。

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