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公开(公告)号：EP2856800B1
公开(公告)日：2018-05-30
申请号：EP12877703.4
申请日：2012-05-30
摘要： The disclosure relates to a method (30) performed in second network node (71, . . . , 7n) of a communication system (1, 1′) adapted for wireless communication and comprising a first network node (31, 32) adapted to operate in a mode of operation according to a first communication standard and a user device (10) adapted to operate according to the first communication standard. The second network node (71, . . . , 7n) is adapted to operate in a mode of operation according to a second communication standard, and adapted to receive uplink signaling in accordance with the first communication standard. The method (30) comprises receiving (31) an access request from the user device (10) in accordance with the first communication standard, and enabling (32) a communication channel for the user device (10) by relaying the received access request to the first network node (31, 32) or by switching from the mode of operation according to the second communication standard, to a mode of operation according to the first communication standard.
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2.发明授权SPATIALLY RANDOMIZED PILOT SYMBOL TRANSMISSION METHOD, SYSTEM AND DEVICE FOR MIMO WIRELESS COMMUNICATIONS 有权用于MIMO无线通信的空间随机化先导符号传输方法，系统和设备
公开(公告)号：EP2751947B1
公开(公告)日：2018-03-07
申请号：EP12704921.1
申请日：2012-01-31
IPC分类号： H04L5/00
CPC分类号： H04B7/0413 , H04B7/0615 , H04B7/0686 , H04L5/0023 , H04L5/005 , H04L25/0204 , H04L25/0226 , H04L2025/03426
摘要： Compressive sampling is used to generate pilot symbols to be transmitted over an array of antennas in a MIMO wireless communications device. A pilot symbol is transmitted over the array of antennas according to a spatially randomized antenna transmission function that randomly changes across the array of antennas. The randomized antenna transmission function may randomly select/deselect antennas and/or randomly change amplitude and/or phase of the pilot symbol transmission. Channel estimates can be constructed at a receiver based on the spatially randomized pilot symbols that were transmitted.
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3.发明授权METHOD AND APPARATUS FOR ENHANCED CHANNEL ESTIMATION IN WIRELESS COMMUNICATION SYSTEMS 有权用于无线通信系统中增强型信道估计的方法和装置
公开(公告)号：EP2446596B1
公开(公告)日：2017-08-09
申请号：EP10733042.5
申请日：2010-06-22
发明人： KRASNY, Leonid , GUEY, Jiann-Ching
CPC分类号： H04L25/0232 , H04L5/0007 , H04L5/0048 , H04L25/0218 , H04L25/022 , H04L25/024
摘要： A method and apparatus for channel estimation based on extracting channel information, including noise spectral density, from a received signal, and advantageously exploiting that information for improved channel estimation accuracy. One embodiment is directed to a method of generating channel estimates in a wireless communication receiver, for processing a received communication signal. The method includes generating first channel estimates from a set of pilot observations obtained from the received communication signal, using a first channel estimation process that is not dependent on knowledge of channel statistics. The method further includes estimating channel statistics and a noise variance from the first channel estimates, and generating second channel estimates from the set of pilot observations, the estimated channel statistics, and the estimated noise variance, using a second channel estimation process that is dependent on knowledge of the channel statistics.
摘要翻译： 一种基于从接收信号中提取信道信息（包括噪声谱密度）的信道估计方法和装置，并且有利地利用该信息来改善信道估计精度。 一个实施例针对一种在无线通信接收器中生成信道估计的方法，用于处理接收到的通信信号。 该方法包括使用不依赖于信道统计的知识的第一信道估计过程，从根据所接收的通信信号获得的一组导频观测值中生成第一信道估计值。 该方法进一步包括根据第一信道估计估计信道统计量和噪声方差，并且使用第二信道估计过程从该组导频观测值，估计的信道统计量和估计的噪声方差中生成第二信道估计，该第二信道估计过程取决于 有关渠道统计的知识。
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4.发明授权
公开(公告)号：EP2856819B1
公开(公告)日：2017-03-22
申请号：EP12878115.0
申请日：2012-05-28
IPC分类号： H04W72/12
CPC分类号： H04W72/04 , H04L12/189 , H04W4/06 , H04W72/1215
摘要： The disclosure relates to a network node 21, 2n; 31, 3n of a communication system 1 for wireless communication. The network node 21, 2n; 31, 3n is configured to utilize a first bandwidth, B1, allocated in accordance with a first communication standard, wherein a first carrier and a second carrier are allocated within the first bandwidth B1. The first carrier has a first bandwidth, Blegacy, and is configured to operate in accordance with a transmission format of the first communication standard, and the second carrier has a second bandwidth, Bnon-lebacy, and is configured to operate in accordance with a transmission format of a second communication standard.
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公开(公告)号：EP2417820B1
公开(公告)日：2015-06-03
申请号：EP10716881.7
申请日：2010-04-09
发明人： GUEY, Jiann-Ching
CPC分类号： H04B7/024 , H04W16/02 , H04W72/1226 , H04W72/1278
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6.发明公开SYSTEMS AND METHOD FOR GRAPH-BASED DISTRIBUTED PARAMETER COORDINATION IN A COMMUNICATION NETWORK 审中-公开系统和方法基于图形分布参数的协调，通信网络
公开(公告)号：EP2786611A1
公开(公告)日：2014-10-08
申请号：EP12813120.8
申请日：2012-11-28
发明人： HUI, Dennis , GUEY, Jiann-Ching
CPC分类号： H04L43/04 , H04L41/0823 , H04W16/02 , H04W24/02
摘要： Systems and methods are disclosed for graph-based distributed parameter coordination in a communication network. In general, discrete local parameters to be coordinated among communication nodes in the network and their respective performance metrics, or costs, are modeled using a factor graph. Based on the factor graph, a variant of the sum-product algorithm, namely the min-sum algorithm, is applied in order for the communication nodes, through iterative message passing with their neighboring communication nodes, to decide upon optimal values for the local parameters for the communication nodes that collectively optimize a global performance metric across the communication network. In one embodiment, the communication network is a wireless communication network. In one specific embodiment, the wireless communication network is a cellular communication network.
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公开(公告)号：EP2382806B1
公开(公告)日：2012-11-28
申请号：EP09788517.2
申请日：2009-03-30
发明人： GUEY, Jiann-Ching , JADING, Ylva
IPC分类号： H04W16/12
CPC分类号： H04W16/12
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公开(公告)号：EP2430787A1
公开(公告)日：2012-03-21
申请号：EP10723341.3
申请日：2010-05-14
CPC分类号： H04L5/0048 , H04L5/02 , H04W72/04
摘要： At least some reference symbols dedicated to a particular communication device are transmitted in resource blocks allocated to other devices. This way, reference symbol assignments are not unduly restricted by other constraints placed on the boundary elements of a resource block. According to an embodiment, data and reference signals are transmitted by transmitting a resource block allocated to a first communication device. The resource block includes a plurality of resource elements, each resource element corresponding to a modulation symbol. At least one reference symbol associated with the resource block and dedicated to the first communication device is transmitted in a resource block allocated to a second communication device. On the receive side, the communication device can perform channel estimation based on reference symbols dedicated to the device that are transmitted in resource blocks allocated to the device and in resource block(s) allocated to other communication device(s).
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9.发明公开METHOD AND APPARATUS FOR COMPLEXITY REDUCTION IN DETECTION OF DELAY AND DOPPLER SHIFTED SIGNATURE SEQUENCES 有权方法和设备若要延迟检测的复杂度降低和多普勒悬浮签名序列
公开(公告)号：EP2158737A1
公开(公告)日：2010-03-03
申请号：EP07861149.8
申请日：2007-12-20
发明人： GUEY, Jiann-Ching
CPC分类号： H04B1/715 , H04B1/70735 , H04B1/7143 , H04B2001/7154 , H04L2027/0034 , H04L2027/0093
摘要： A signature sequence is employed in a wireless transmission over a channel and is detected by a receiving station. The signature sequence is selected from a subset of sequences chosen from a set of sequences formed by delay-Doppler shifts of a base sequence. Use of the subset of sequences simplifies detection of the signature sequence by, e.g., facilitating use of a simpler detector structure. A subset of N2 sequences of the specially-constructed delay-Doppler shifted sequence set is selected to facilitate more efficient computation of the detection metric. A simplified detector employs algebraic techniques (such as Discrete Fourier Transform (DFT)) that exploit prudent sequence assignment strategy. As an advantageous variation, for a particular class of base sequences that can be represented by segments of equal-length sinusoids, even greater complexity reduction can be achieved by segmenting the delay-Doppler correlation accordingly and reusing past outcome in subsequent overlapping segments.
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10.发明公开NOVEL SIGNATURE SEQUENCES AND METHODS FOR TIME-FREQUENCY SELECTIVE CHANNEL 审中-公开新的签名序列和方法对时间频率选择性信道
公开(公告)号：EP2119164A2
公开(公告)日：2009-11-18
申请号：EP07861122.5
申请日：2007-12-18
发明人： GUEY, Jiann-Ching
CPC分类号： H04J13/14 , H04J13/0003 , H04J13/0055 , H04J13/0074
摘要： A signature sequence employed in a wireless transmission over a channel is detected and utilized. The signature sequence is selected from a set of sequences formed by delay-Doppler shifts of a base sequence. Preferably but not exclusively, the set of sequences is formed by circular delay-Doppler shifts of the base sequence. The base sequence can be, for example, an m-sequence. A received signal is obtained from a received wireless transmission. A candidate sequence selector (90) selects a candidate sequence from among a set of sequences for evaluation as the signature sequence, the set of sequences having been formed by sequence set generator (88) as delay-Doppler shifts of a base sequence. An image former (82) uses the base sequence and the received signal to form a delay-Doppler image with respect to an image area pertinent to the candidate sequence. A metric analyzer (84) computes a metric over the image area pertinent to the candidate sequence and uses the metric to determine if the signature sequence is the candidate sequence. A sequence utilization device (76) can use the signature sequence to identify another transceiver unit which sent the wireless transmission, and/or use the signature sequence for synchronization with another transceiver unit which sent the wireless transmission.
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