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1. 发明授权

US07844048B2 Selective tone event detector and method therefor 有权
标题翻译：选择性色调事件检测器及其方法
公开(公告)号：US07844048B2
公开(公告)日：2010-11-30
申请号：US10795700
申请日：2004-03-08
申请人： Lucio F. C. Pessoa , Ahsan U. Aziz , Wen Wu Su
发明人： Lucio F. C. Pessoa , Ahsan U. Aziz , Wen Wu Su
IPC分类号： H04M3/00
CPC分类号： H04Q1/457 , H04M11/066
摘要： In one embodiment, a tone event detector first determines whether the presence of a tone is indicated on the input signal, and then, based on this determination, selectively determines whether a tone has been detected on the input signal. For example, in one embodiment, tone detection is performed only when the presence of a tone is first indicated, such that if the presence of a tone is not indicated, tone detection need not be performed. This may help reduce complexity of a tone event detector since a simplified method may be used to indicate the presence of a tone, and the more complex algorithms for tone detection may be enabled only when needed. Also, in one embodiment, detection of a tone includes generating one or more tone characteristics corresponding to the detected tone which may then be used to determine whether the detected tone corresponds to a valid tone event.
摘要翻译：在一个实施例中，音调事件检测器首先确定在输入信号上是否指示音调的存在，然后基于该确定，选择性地确定是否在输入信号上检测到音调。例如，在一个实施例中，仅当首先指示音调的存在时才执行音调检测，使得如果没有指示音调的存在，则不需要执行音调检测。这可能有助于降低音调事件检测器的复杂性，因为可以使用简化的方法来指示音调的存在，并且可以仅在需要时才启用用于音调检测的更复杂的算法。此外，在一个实施例中，音调的检测包括产生与检测到的音调相对应的一个或多个音调特性，然后可以使用它们来确定检测到的音调是否对应于有效音调事件。

2. 发明授权

US08457222B2 Method for estimating channel statistics in an OFDM receiver 有权
标题翻译：用于估计OFDM接收机中的信道统计的方法
公开(公告)号：US08457222B2
公开(公告)日：2013-06-04
申请号：US12204975
申请日：2008-09-05
申请人： Ahsan U. Aziz , Sili Lu
发明人： Ahsan U. Aziz , Sili Lu
IPC分类号： H04L27/01
CPC分类号： H04L25/0204 , H04L25/022 , H04L25/0224 , H04L25/0232
摘要： A method of estimating channel statistics includes storing a plurality of pilot symbols from a plurality of received signals, establishing a reference for correlation; computing instantaneous correlations for each time lag of each of the plurality of pilot symbols relative to the reference, providing a table comprising non-isotropic scattering correlation values, computing current refined correlations using previous refined correlations and instantaneous correlations, comparing current refined correlations to the table of correlation values, and choosing correlation values from the table based on the step of comparing current refined correlations to the table.
摘要翻译：估计信道统计的方法包括从多个接收信号中存储多个导频符号，建立相关参考; 计算所述多个导频符号中的每一个相对于该参考的每个时滞的瞬时相关性，提供包括非各向同性散射相关值的表，使用先前精细相关和瞬时相关来计算当前精细化相关性，将当前精细相关与该表进行比较的相关值，并且基于将当前精细相关性与表进行比较的步骤从表中选择相关值。

3. 发明申请

US20130034017A1 TECHNIQUES FOR IMPROVING CHANNEL ESTIMATION AND TRACKING IN A WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：在无线通信系统中改进信道估计和跟踪的技术
公开(公告)号：US20130034017A1
公开(公告)日：2013-02-07
申请号：US13567997
申请日：2012-08-06
申请人： Ning Chen , Ahsan U. Aziz , Leo G. Dehner , Taeyoon Kim
发明人： Ning Chen , Ahsan U. Aziz , Leo G. Dehner , Taeyoon Kim
IPC分类号： H04W16/00
CPC分类号： H04L5/0053 , H04L25/0204 , H04L25/0236 , H04W28/04 , H04W56/0055
摘要： A technique for performing channel tracking and/or channel estimation in a wireless communication device includes receiving a reference signal and one or more non-error propagation physical channel signals. In general, the one or more non-error propagation physical channel signals must be correctly decoded before a data channel can be decoded. Channel tracking and/or channel estimation are/is then performed based on the reference signal and at least one of the one or more non-error propagation physical channel signals.
摘要翻译：用于在无线通信设备中执行信道跟踪和/或信道估计的技术包括接收参考信号和一个或多个非错误传播物理信道信号。一般来说，一个或多个非错误传播物理信道信号必须在数据信道可被解码之前被正确解码。然后基于参考信号和一个或多个非错误传播物理信道信号中的至少一个执行信道跟踪和/或信道估计。

4. 发明授权

US08976773B2 Cell identifier encoding and decoding methods and apparatus 有权
标题翻译：小区标识符编码和解码方法和装置
公开(公告)号：US08976773B2
公开(公告)日：2015-03-10
申请号：US13556087
申请日：2012-07-23
申请人： Ahsan U. Aziz , Vikram Chandrasekhar , James Wesley McCoy
发明人： Ahsan U. Aziz , Vikram Chandrasekhar , James Wesley McCoy
IPC分类号： H04B7/216 , H04W8/26 , H04L5/00 , H04L27/26 , H04B1/7083 , H04J13/00 , H04J13/16 , H04W56/00
CPC分类号： H04W8/26 , H04B1/7083 , H04J13/0055 , H04J13/0066 , H04J13/16 , H04J2013/165 , H04L5/0007 , H04L5/0016 , H04L5/0048 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04W56/00
摘要： In an embodiment, a wireless communication system (100, FIG. 1) includes one or more nodes (102-108) and one or more user equipments (UE) (110). A node may apply (502, FIG. 5) a cell-specific spreading code to a cell identifier, which indicates an identity of a cell (113, FIG. 1) serviced by the node. The node may insert (504, FIG. 5), into a frame (200, FIG. 2), at least one synchronization channel symbol, which corresponds to the spread cell identifier, and the node may transmit (506, FIG. 5) the frame over an air interface. A UE may receive (702, FIG. 7) a frame from the air interface. The UE may despread (708) the spread cell identifier, and acquire (712) a cell identifier corresponding to a particular cell.
摘要翻译：在一个实施例中，无线通信系统（100，图1）包括一个或多个节点（102-108）和一个或多个用户设备（UE）（110）。节点可以将小区特定扩展码应用（502，图5）到小区标识符，小区标识符指示由节点服务的小区（113，图1）的身份。节点可以将（504，图5）插入到帧（200，图2）中，对应于扩展小区标识符的至少一个同步信道符号，并且节点可以发送（图5的506）框架通过空中接口。 UE可以从空中接口接收（702，图7）帧。 UE可以解扩（708）扩展小区标识符，并获取对应于特定小区的小区标识（712）。

5. 发明申请

US20130021973A1 CELL IDENTIFIER ENCODING AND DECODING METHODS AND APPARATUS 有权
标题翻译：细胞识别器编码和解码方法和设备
公开(公告)号：US20130021973A1
公开(公告)日：2013-01-24
申请号：US13556087
申请日：2012-07-23
申请人： Ahsan U. Aziz , Vikram Chandrasekhar , James Wesley McCoy
发明人： Ahsan U. Aziz , Vikram Chandrasekhar , James Wesley McCoy
IPC分类号： H04W56/00
CPC分类号： H04W8/26 , H04B1/7083 , H04J13/0055 , H04J13/0066 , H04J13/16 , H04J2013/165 , H04L5/0007 , H04L5/0016 , H04L5/0048 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04W56/00
摘要： In an embodiment, a wireless communication system (100, FIG. 1) includes one or more nodes (102-108) and one or more user equipments (UE) (110). A node may apply (502, FIG. 5) a cell-specific spreading code to a cell identifier, which indicates an identity of a cell (113, FIG. 1) serviced by the node. The node may insert (504, FIG. 5), into a frame (200, FIG. 2), at least one synchronization channel symbol, which corresponds to the spread cell identifier, and the node may transmit (506, FIG. 5) the frame over an air interface. A UE may receive (702, FIG. 7) a frame from the air interface. The UE may despread (708) the spread cell identifier, and acquire (712) a cell identifier corresponding to a particular cell.
摘要翻译：在一个实施例中，无线通信系统（100，图1）包括一个或多个节点（102-108）和一个或多个用户设备（UE）（110）。节点可以将小区特定扩展码应用（502，图5）到小区标识符，小区标识符指示由节点服务的小区（113，图1）的身份。节点可以将（504，图5）插入到帧（200，图2）中，对应于扩展小区标识符的至少一个同步信道符号，并且节点可以发送（图5的506）框架通过空中接口。 UE可以从空中接口接收（702，图7）帧。 UE可以解扩（708）扩展小区标识符，并获取对应于特定小区的小区标识（712）。

6. 发明授权

US08238482B2 Techniques for improving channel estimation and tracking in a wireless communication system 有权
标题翻译：在无线通信系统中改善信道估计和跟踪的技术
公开(公告)号：US08238482B2
公开(公告)日：2012-08-07
申请号：US12250613
申请日：2008-10-14
申请人： Ning Chen , Ahsan U. Aziz , Leo G. Dehner , Taeyoon Kim
发明人： Ning Chen , Ahsan U. Aziz , Leo G. Dehner , Taeyoon Kim
IPC分类号： H04L27/06
CPC分类号： H04L5/0053 , H04L25/0204 , H04L25/0236 , H04W28/04 , H04W56/0055
摘要： A technique for performing channel tracking and/or channel estimation in a wireless communication device includes receiving a reference signal and one or more non-error propagation physical channel signals. In general, the one or more non-error propagation physical channel signals must be correctly decoded before a data channel can be decoded. Channel tracking and/or channel estimation are/is then performed based on the reference signal and at least one of the one or more non-error propagation physical channel signals.
摘要翻译：用于在无线通信设备中执行信道跟踪和/或信道估计的技术包括接收参考信号和一个或多个非错误传播物理信道信号。一般来说，一个或多个非错误传播物理信道信号必须在数据信道可被解码之前被正确解码。然后基于参考信号和一个或多个非错误传播物理信道信号中的至少一个执行信道跟踪和/或信道估计。

7. 发明授权

US08228887B2 Cell identifier encoding and decoding methods and apparatus 有权
标题翻译：小区标识符编码和解码方法和装置
公开(公告)号：US08228887B2
公开(公告)日：2012-07-24
申请号：US11540784
申请日：2006-09-29
申请人： Ahsan U. Aziz , Vikram Chandrasekhar , James Wesley McCoy
发明人： Ahsan U. Aziz , Vikram Chandrasekhar , James Wesley McCoy
IPC分类号： H04B7/216 , H04B7/208 , H04B1/00
CPC分类号： H04W8/26 , H04B1/7083 , H04J13/0055 , H04J13/0066 , H04J13/16 , H04J2013/165 , H04L5/0007 , H04L5/0016 , H04L5/0048 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04W56/00
摘要： In an embodiment, a wireless communication system (100, FIG. 1) includes one or more nodes (102-108) and one or more user equipments (UE) (110). A node may apply (502, FIG. 5) a cell-specific spreading code to a cell identifier, which indicates an identity of a cell (113, FIG. 1) serviced by the node. The node may insert (504, FIG. 5), into a frame (200, FIG. 2), at least one synchronization channel symbol, which corresponds to the spread cell identifier, and the node may transmit (506, FIG. 5) the frame over an air interface. A UE may receive (702, FIG. 7) a frame from the air interface. The UE may despread (708) the spread cell identifier, and acquire (712) a cell identifier corresponding to a particular cell.
摘要翻译：在一个实施例中，无线通信系统（100，图1）包括一个或多个节点（102-108）和一个或多个用户设备（UE）（110）。节点可以将小区特定扩展码应用（502，图5）到小区标识符，小区标识符指示由节点服务的小区（113，图1）的身份。节点可以将（504，图5）插入到帧（200，图2）中，对应于扩展小区标识符的至少一个同步信道符号，并且节点可以发送（图5的506）框架通过空中接口。 UE可以从空中接口接收（702，图7）帧。 UE可以解扩（708）扩展小区标识符，并获取对应于特定小区的小区标识（712）。

8. 发明授权

US07684504B2 System and method for reducing edge effect 有权
标题翻译：减少边缘效应的系统和方法
公开(公告)号：US07684504B2
公开(公告)日：2010-03-23
申请号：US11589877
申请日：2006-10-31
申请人： Ahsan U. Aziz
发明人： Ahsan U. Aziz
IPC分类号： H04K1/10
CPC分类号： H04L27/265 , H04L25/0232
摘要： A channel estimator (150) is provided that comprises: an extension circuit (410) configured to receive a pilot signal (510), and add front and back extension signals (620, 630) to a front and back of the pilot signal, respectively, creating a first signal (610), the front and back extension signals being extension of a first and last symbol, respectively, in the pilot signal; an IDFT circuit (420) configured to perform an IDFT function on the first signal, generating a second signal (710); a signal processing element (430, 440, 470, 480) configured to perform one or more operations on the second signal, generating a third signal (910); a DFT circuit (450) configured to perform a DFT function on the third signal, generating a fourth signal (1010); and a reduction circuit configured to cut off front and back ends of the fourth signal, generating a channel estimation signal (1110).
摘要翻译：提供了一种信道估计器（150），其包括：扩展电路（410），被配置为接收导频信号（510），并且分别向所述导频信号的前面和后面添加前后延伸信号（620,630），创建第一信号（610），所述前延伸信号和所述后扩展信号分别是所述导频信号中的第一和最后一个符号的扩展; IDFT电路（420），被配置为对所述第一信号执行IDFT功能，产生第二信号（710）; 配置为对所述第二信号执行一个或多个操作的信号处理元件（430,440,470,480），产生第三信号（910）; DFT电路（450），被配置为对所述第三信号执行DFT功能，生成第四信号（1010）; 以及还原电路，被配置为切断第四信号的前端和后端，产生信道估计信号（1110）。

9. 发明授权

US09137055B2 Techniques for improving channel estimation and tracking in a wireless communication system 有权
标题翻译：在无线通信系统中改善信道估计和跟踪的技术
公开(公告)号：US09137055B2
公开(公告)日：2015-09-15
申请号：US13567997
申请日：2012-08-06
申请人： Ning Chen , Ahsan U. Aziz , Leo G. Dehner , Taeyoon Kim
发明人： Ning Chen , Ahsan U. Aziz , Leo G. Dehner , Taeyoon Kim
IPC分类号： H04B1/10 , H04L25/02 , H04L5/00 , H04W28/04
CPC分类号： H04L5/0053 , H04L25/0204 , H04L25/0236 , H04W28/04 , H04W56/0055
摘要： A technique for performing channel tracking and/or channel estimation in a wireless communication device includes receiving a reference signal and one or more non-error propagation physical channel signals. In general, the one or more non-error propagation physical channel signals must be correctly decoded before a data channel can be decoded. Channel tracking and/or channel estimation are/is then performed based on the reference signal and at least one of the one or more non-error propagation physical channel signals.
摘要翻译：用于在无线通信设备中执行信道跟踪和/或信道估计的技术包括接收参考信号和一个或多个非错误传播物理信道信号。一般来说，一个或多个非错误传播物理信道信号必须在数据信道可被解码之前被正确解码。然后基于参考信号和一个或多个非错误传播物理信道信号中的至少一个执行信道跟踪和/或信道估计。

10. 发明申请

US20080304605A1 METHOD OF PROVIDING A DATA SIGNAL FOR CHANNEL ESTIMATION AND CIRCUIT THEREOF 有权
标题翻译：提供用于信道估计的数据信号的方法及其电路
公开(公告)号：US20080304605A1
公开(公告)日：2008-12-11
申请号：US12183762
申请日：2008-07-31
申请人： Ahsan U. Aziz , Leo G. Dehner
发明人： Ahsan U. Aziz , Leo G. Dehner
IPC分类号： H04L1/02
CPC分类号： H04L25/0232 , H04L25/0216 , H04L27/2605 , H04L27/2647
摘要： A received signal having pilots is converted to a first signal in the frequency domain having the pilots. The pilots are extracted from the first signal to obtain extracted pilots to form a second signal. The second signal is used to provide a first estimate of a channel. The first estimate is converted to the time domain. Noise is removed from the first estimate in the time domain to provide a second estimate of the channel in the time domain. An autocorrelation of the channel in the frequency domain is determined using the second estimate of the channel. Extension signals are determined using the autocorrelation. The extension signals are appended to the first estimate of the channel to obtain a third estimate of the channel. The third estimate is used to provide a data signal in the frequency domain.
摘要翻译：具有导频的接收信号在具有导频的频域中被转换为第一信号。从第一信号提取导频以获得提取的导频以形成第二信号。第二信号用于提供信道的第一估计。第一个估计值被转换为时域。在时域中从第一估计中去除噪声，以提供时域中的信道的第二估计。使用信道的第二估计来确定频域中的信道的自相关。扩展信号使用自相关来确定。扩展信号附加到信道的第一估计，以获得信道的第三估计。第三个估计用于提供频域中的数据信号。

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