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1.发明申请公开(公告)号：US20080293410A1
公开(公告)日：2008-11-27
申请号：US11753675
申请日：2007-05-25
Applicant: Wing Chau Chan , Kwok Shum Au , Rui Wang , Tianyu Wu , Kin Nang Lau , Shu Kwan Cheng , Ross David Murch , Wai Ho Mow
Inventor： Wing Chau Chan , Kwok Shum Au , Rui Wang , Tianyu Wu , Kin Nang Lau , Shu Kwan Cheng , Ross David Murch , Wai Ho Mow
IPC: H04Q7/20
CPC classification number: H04W24/08
Abstract: A method for sensing channel availability in a wireless network includes receiving a measurement request message which includes a channel interval list. A first channel interval in the list includes information associated with a first starting channel number, a first number of channels, and first linkage information of the channel interval list. The method includes processing information associated with the message, generating a first list of contiguous channels, and performing at least first channel measurement to determine a first channel availability for each of the first list of contiguous channels. The method also includes determining whether the channel interval list further includes a second channel interval that needs to be processed based on at least first linkage information, and if needed, generating a second list of contiguous channels and performing at least second channel measurement to determine a second channel availability for each of the second list of contiguous channels.
Abstract translation: 用于感测无线网络中的信道可用性的方法包括：接收包括信道间隔列表的测量请求消息。 列表中的第一信道间隔包括与第一起始信道号，第一信道数和信道间隔列表的第一链接信息相关联的信息。 该方法包括处理与消息相关联的信息，产生连续信道的第一列表，以及执行至少第一信道测量以确定第一连续信道列表中的每一个的第一信道可用性。 该方法还包括确定信道间隔列表是否还包括基于至少第一链接信息需要处理的第二信道间隔，并且如果需要，生成连续信道的第二列表并执行至少第二信道测量以确定 连续通道的第二列表中的每一个的第二通道可用性。
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2.发明授权公开(公告)号：US08081972B2
公开(公告)日：2011-12-20
申请号：US11753675
申请日：2007-05-25
Applicant: Wing Chau Chan , Kwok Shum Au , Rui Wang , Tianyu Wu , Kin Nang Lau , Shu Kwan Cheng , Ross David Murch , Wai Ho Mow
Inventor： Wing Chau Chan , Kwok Shum Au , Rui Wang , Tianyu Wu , Kin Nang Lau , Shu Kwan Cheng , Ross David Murch , Wai Ho Mow
CPC classification number: H04W24/08
Abstract: A method for sensing channel availability in a wireless network includes receiving a measurement request message which includes a channel interval list. A first channel interval in the list includes information associated with a first starting channel number, a first number of channels, and first linkage information of the channel interval list. The method includes processing information associated with the message, generating a first list of contiguous channels, and performing at least first channel measurement to determine a first channel availability for each of the first list of contiguous channels. The method also includes determining whether the channel interval list further includes a second channel interval that needs to be processed based on at least first linkage information, and if needed, generating a second list of contiguous channels and performing at least second channel measurement to determine a second channel availability for each of the second list of contiguous channels.
Abstract translation: 用于感测无线网络中的信道可用性的方法包括：接收包括信道间隔列表的测量请求消息。 列表中的第一信道间隔包括与第一起始信道号，第一信道数和信道间隔列表的第一链接信息相关联的信息。 该方法包括处理与消息相关联的信息，产生连续信道的第一列表，以及执行至少第一信道测量以确定第一连续信道列表中的每一个的第一信道可用性。 该方法还包括确定信道间隔列表是否还包括基于至少第一链接信息需要处理的第二信道间隔，并且如果需要，生成连续信道的第二列表并执行至少第二信道测量以确定 连续通道的第二列表中的每一个的第二通道可用性。
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公开(公告)号：US20110300849A1
公开(公告)日：2011-12-08
申请号：US12795353
申请日：2010-06-07
Applicant: Wing Chau Chan
Inventor： Wing Chau Chan
IPC: H04W4/00
CPC classification number: H04L1/1867 , H04L1/201 , H04L5/0055 , H04L25/067 , H04L2001/125
Abstract: The present invention relates to ACK-NACK detection in an LTE wireless communication system. To determine a threshold value for an ACK-NACK transmission, an SC-FDMA signal is received from user equipment. Then, a power estimate of soft data bits is used to establish a threshold value for determining the presence of an ACK-NACK signal. Using this threshold value, a signal from the user equipment is analyzed to determine if it contains an ACK or NACK transmission.
Abstract translation: 本发明涉及LTE无线通信系统中的ACK-NACK检测。 为了确定ACK-NACK传输的阈值，从用户设备接收SC-FDMA信号。 然后，使用软数据位的功率估计来建立用于确定ACK-NACK信号的存在的阈值。 使用该阈值，分析来自用户设备的信号以确定其是否包含ACK或NACK传输。
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4.发明授权公开(公告)号：US08000398B2
公开(公告)日：2011-08-16
申请号：US12128430
申请日：2008-05-28
Applicant: Zhengang Pan , Wing Chau Chan , XueYuan Zhao , Chi Ming Lo
Inventor： Zhengang Pan , Wing Chau Chan , XueYuan Zhao , Chi Ming Lo
IPC: H04K1/10
CPC classification number: H04L5/005 , H04L5/0007 , H04L27/2613
Abstract: A method of time domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) communication, including the steps of: preparing OFDM-body; generating pseudo random (PN) sequence as a training signal; manipulating the PN sequence to concentrate the energy distribution thereof to the same bandwidth of sub-carriers of the OFDM-body; offsetting the manipulated PN sequence to align with frequency spectrum of the sub-carriers; and inserting the offset PN sequence as prefix of a TDS-OFDM data frame. The manipulating step may include the step of repeating the PN sequence by N times, wherein the spectrum of the repeated PN sequence concentrates on discrete bundles of sub-carriers, i.e., on one sub-carrier every N sub-carriers or M adjacent sub-carriers every MN sub-carriers, where M is an integer determined by the time duration ratio of the OFDM body and prefix. Alternatively, the manipulating step may include the step of expanding the PN sequence by N times, wherein the spectrum of the expanded PN sequence concentrates on a block of continual adjacent sub-carriers, the bandwidth of the PN sequence is 1/N of the whole bandwidth.
Abstract translation: 一种时域同步正交频分复用（TDS-OFDM）通信方法，包括以下步骤：准备OFDM体; 生成伪随机（PN）序列作为训练信号; 操纵PN序列以将其能量分布集中到OFDM体的子载波的相同带宽; 抵消所操纵的PN序列以与子载波的频谱对准; 并将偏移PN序列作为TDS-OFDM数据帧的前缀插入。 操纵步骤可以包括重复PN序列N次的步骤，其中重复的PN序列的频谱集中在离散的子载波束上，即在每N个子载波或M个相邻子载波上的一个子载波上， 承载每个MN子载波，其中M是由OFDM体和前缀的持续时间比确定的整数。 或者，操纵步骤可以包括将PN序列扩展N次的步骤，其中扩展的PN序列的频谱集中在连续的相邻子载波的块上，PN序列的带宽是整个的1 / N 带宽。
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5.发明申请公开(公告)号：US20090296834A1
公开(公告)日：2009-12-03
申请号：US12128430
申请日：2008-05-28
Applicant: Zhengang Pan , Wing Chau Chan , XueYuan Zhao , Chi Ming Lo
Inventor： Zhengang Pan , Wing Chau Chan , XueYuan Zhao , Chi Ming Lo
IPC: H04L27/28
CPC classification number: H04L5/005 , H04L5/0007 , H04L27/2613
Abstract: A method of time domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) communication, including the steps of: preparing OFDM-body 402; generating pseudo random (PN) sequence 403 as a training signal; manipulating the PN sequence 403 to concentrate the energy distribution thereof to the same bandwidth of sub-carriers of the OFDM-body; offsetting the manipulated PN sequence to align with frequency spectrum of the sub-carriers 406; and inserting the offset PN sequence as prefix 401 of a TDS-OFDM data frame 400. The manipulating step may include the step of repeating the PN sequence by N times, wherein the spectrum of the repeated PN sequence concentrates on discrete bundles of sub-carriers, i.e., on one sub-carrier every N sub-carriers or M adjacent sub-carriers every MN sub-carriers, where M is an integer determined by the time duration ratio of the OFDM body and prefix.. Alternatively, the manipulating step may include the step of expanding the PN sequence by N times, wherein the spectrum of the expanded PN sequence concentrates on a block of continual adjacent sub-carriers, the bandwidth of the PN sequence is 1/N of the whole bandwidth.
Abstract translation: 一种时域同步正交频分复用（TDS-OFDM）通信方法，包括以下步骤：准备OFDM体402; 生成伪随机（PN）序列403作为训练信号; 操纵PN序列403以将其能量分布集中到OFDM体的子载波的相同带宽; 抵消所操纵的PN序列以与副载波406的频谱对准; 并且将偏移PN序列作为TDS-OFDM数据帧400的前缀401插入。操纵步骤可以包括将PN序列重复N次的步骤，其中重复的PN序列的频谱集中在离散的子载波束上 即每N个子载波上每N个子载波或M个相邻子载波在一个子载波上，其中M是由OFDM主体和前缀的持续时间比确定的整数。或者，操纵步骤可以 包括将PN序列扩展N次的步骤，其中扩展的PN序列的频谱集中在连续的相邻子载波的块上，PN序列的带宽是整个带宽的1 / N。
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Patent Agency Ranking
公开(公告)号：US09001678B2
公开(公告)日：2015-04-07
申请号：US13408842
申请日：2012-02-29
Applicant: Honglei Zhang , Yuxian Zhang , Jun Xu , Wing Chau Chan
Inventor： Honglei Zhang , Yuxian Zhang , Jun Xu , Wing Chau Chan
CPC classification number: H04L27/26 , H04L27/2656 , H04L27/2671 , H04L27/2675
Abstract: The present embodiments are directed to systems and methods for detecting random access channel requests, while excluding false random access signals using search windowing and distance-based peak suppression techniques. The present embodiments additionally include further techniques for suppression of fake random access signals, including amplitude thresholds and preamble-based signal exclusion. Beneficially, the present embodiments significantly reduce the false alarm rate, while maintaining a low hardware complexity requirements. In some embodiments, worst-case false alarm rates can be reduced from as much as 20% down to nearly 0.1%.
Abstract translation: 本实施例涉及用于检测随机接入信道请求的系统和方法，同时使用搜索窗口和基于距离的峰值抑制技术排除伪随机接入信号。 本实施例另外包括用于抑制假随机接入信号的其它技术，包括振幅阈值和基于前导码的信号排除。 有利地，本实施例在保持低硬件复杂度要求的同时显着降低了误报率。 在一些实施例中，最坏情况的错误警报率可以从多达20％降低到接近0.1％。
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公开(公告)号：US08837312B2
公开(公告)日：2014-09-16
申请号：US13408864
申请日：2012-02-29
Applicant: Wing Chau Chan , Jun Xu
Inventor： Wing Chau Chan , Jun Xu
IPC: H04W24/00
CPC classification number: H04B1/7075 , H04J13/0062 , H04L27/2663 , H04L27/2671 , H04L27/2675 , H04L27/2684
Abstract: Bias introduced by down-sampling may be eliminated, or significantly reduced, by the present embodiments. Methods and apparatuses are described for use in wireless communication systems including LTE and other mobile data systems. The method includes identifying a timing offset estimation bias caused by a misalignment between samples and a zero-offset point of a preamble signature.
Abstract translation: 通过下采样引入的偏差可以通过本实施例消除或显着减少。 描述了用于包括LTE和其他移动数据系统的无线通信系统中的方法和装置。 该方法包括识别由采样之间的未对准和前导签名的零点偏移引起的定时偏移估计偏置。
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公开(公告)号：US20130223242A1
公开(公告)日：2013-08-29
申请号：US13408864
申请日：2012-02-29
Applicant: Wing Chau Chan , Jun Xu
Inventor： Wing Chau Chan , Jun Xu
IPC: H04W24/00
CPC classification number: H04B1/7075 , H04J13/0062 , H04L27/2663 , H04L27/2671 , H04L27/2675 , H04L27/2684
Abstract: Bias introduced by down-sampling may be eliminated, or significantly reduced, by the present embodiments. Methods and apparatuses are described for use in wireless communication systems including LTE and other mobile data systems. The method includes identifying a timing offset estimation bias caused by a misalignment between samples and a zero-offset point of a preamble signature.
Abstract translation: 通过下采样引入的偏差可以通过本实施例消除或显着减少。 描述了用于包括LTE和其他移动数据系统的无线通信系统中的方法和装置。 该方法包括识别由采样之间的未对准和前导签名的零点偏移引起的定时偏移估计偏置。
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9.发明授权Method and apparatus for estimation of channel temporal correlation and MIMO mode selection in LTE system 有权LTE系统中信道时间相关和MIMO模式选择的估计方法和装置公开(公告)号：US08644181B2
公开(公告)日：2014-02-04
申请号：US13210395
申请日：2011-08-16
Applicant: Xue-yuan Zhao , Wing Chau Chan , Cheng Wang , Henry Hui Ye
Inventor： Xue-yuan Zhao , Wing Chau Chan , Cheng Wang , Henry Hui Ye
CPC classification number: H04B7/0417 , H04B7/01 , H04B7/0639 , H04L25/0204 , H04L25/0222 , H04L25/0224 , H04L27/2647
Abstract: The present invention relates to a method and apparatus for channel temporal correlation estimation and MIMO mode selection. An embodiment of the invention under LTE system utilizes SRS symbols for temporal correlation estimation and performs MIMO mode selection based on the said temporal correlation estimation.
Abstract translation: 本发明涉及用于信道时间相关估计和MIMO模式选择的方法和装置。 LTE系统下的本发明的实施例利用SRS符号进行时间相关估计，并且基于所述时间相关估计执行MIMO模式选择。
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公开(公告)号：US20130223241A1
公开(公告)日：2013-08-29
申请号：US13408842
申请日：2012-02-29
Applicant: Honglei Zhang , Yuxian Zhang , Jun Xu , Wing Chau Chan
Inventor： Honglei Zhang , Yuxian Zhang , Jun Xu , Wing Chau Chan
IPC: H04W24/00
CPC classification number: H04L27/26 , H04L27/2656 , H04L27/2671 , H04L27/2675
Abstract: The present embodiments are directed to systems and methods for detecting random access channel requests, while excluding false random access signals using search windowing and distance-based peak suppression techniques. The present embodiments additionally include further techniques for suppression of fake random access signals, including amplitude thresholds and preamble-based signal exclusion. Beneficially, the present embodiments significantly reduce the false alarm rate, while maintaining a low hardware complexity requirements. In some embodiments, worst-case false alarm rates can be reduced from as much as 20% down to nearly 0.1%.
Abstract translation: 本实施例涉及用于检测随机接入信道请求的系统和方法，同时使用搜索窗口和基于距离的峰值抑制技术排除假随机接入信号。 本实施例另外包括用于抑制假随机接入信号的其它技术，包括振幅阈值和基于前导码的信号排除。 有利地，本实施例在保持低硬件复杂度要求的同时显着降低了误报率。 在一些实施例中，最坏情况的错误警报率可以从多达20％降低到接近0.1％。
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