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1. 发明申请

US20190058501A1 METHOD FOR RECOVERING ORIGINAL SIGNAL IN REDUCED COMPLEXITY DS-CDMA SYSTEM 审中-公开
公开(公告)号：US20190058501A1
公开(公告)日：2019-02-21
申请号：US16066087
申请日：2016-05-31
申请人： UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
发明人： Sung Young LEE , Dinh Mao BUI
IPC分类号： H04B1/7087 , H04L1/20 , H04L27/26 , H04L27/20
CPC分类号： H04B1/7087 , H04B1/7103 , H04B2001/70706 , H04L1/203 , H04L27/20 , H04L27/2017 , H04L27/2628
摘要： Disclosed is a method for recovering an original signal in a DS-CDMA system based on complexity reduction. In such a method, first, a partial derivative for rMLL is calculated by using a partial derivative generated by applying fast Fourier transform (FFT) to a reduced negative marginal log likelihood (rMLL) obtained by applying a law of log determinant to a Gaussian process regression (GPR) scheme used for the multi-user detection and thereafter, integrating stochastic gradient descent (SGD). Thereafter, the rMLL is calculated by using the partial derivative for the rMLL and a hyper-parameter is updated to a convergence point until an error gap is converged by repeated calculation of the rMLL. Next, a kernel function used for estimating a matched filter is calculated by using the hyper-parameter estimated through the convergence and the original signal for each of multi-users is recovered by using the kernel function.

2. 发明授权

US09854545B2 Apparatus and method for establishing uplink synchronization in a wireless communication system 有权
公开(公告)号：US09854545B2
公开(公告)日：2017-12-26
申请号：US14733068
申请日：2015-06-08
申请人： GOLDPEAK INNOVATIONS INC
发明人： Kibum Kwon , Myungcheul Jung
IPC分类号： H04J3/06 , H04W56/00 , H04W74/00 , H04W76/04 , H04L5/00 , H04W88/08 , H04W92/10 , H04B1/7087
CPC分类号： H04W56/0005 , H04B1/7087 , H04L5/0007 , H04L5/001 , H04W56/0045 , H04W74/004 , H04W76/27 , H04W88/08 , H04W92/10
摘要： Uplink synchronization establishment in a base station which operates a plurality of component carriers according to one embodiment of the present description, is performed in that the base station is connected to a user equipment, sets component carrier aggregation information, generates an uplink timing groups in the set component carrier aggregation, and transmits information on the thus-generated uplink timing groups to the user equipment.

3. 发明授权

US09847809B2 Using multiple correlators to determine signal sent and frequency offset 有权
公开(公告)号：US09847809B2
公开(公告)日：2017-12-19
申请号：US15106141
申请日：2014-12-10
申请人： Nordic Semiconductor ASA
发明人： David Alexandre Engelien-Lopes , Sverre Wichlund , Phil Corbishley
IPC分类号： H03D1/00 , H04L27/06 , H04B1/7087 , H04L27/00 , H04L27/227 , H04B17/336 , H04L5/00 , H04W4/00
CPC分类号： H04B1/7087 , H04B17/336 , H04B2201/69 , H04L5/006 , H04L27/0014 , H04L27/227 , H04L2027/0026 , H04L2027/0034 , H04L2027/0046 , H04W4/80
摘要： A digital radio receiver is adapted to receive radio signals modulated using continuous phase modulation. The receiver includes components for receiving analogue radio signals having various carrier frequencies and a plurality of correlators corresponding to different bit sequences. Each of the plurality of correlators share a common estimator for estimating a frequency offset between the radio signals carrier frequencies and nominal carrier frequencies. The receiver further includes components allowing the estimator to determine which of the correlators produce the most optimal output signal.

4. 发明授权

US09692587B2 Phase tracking 有权
公开(公告)号：US09692587B2
公开(公告)日：2017-06-27
申请号：US14922345
申请日：2015-10-26
申请人： Higher Ground LLC
发明人： Bruce L. McKinley
IPC分类号： H04L7/00 , H04L27/26
CPC分类号： H04L7/002 , H04B1/7087 , H04L7/0079 , H04L27/0014 , H04L27/2605 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L2027/0067
摘要： Techniques for pilot-aided carrier frequency and phase synchronization may use a three-pass process. In a first pass, initial frequency offset may be addressed, and a frame start time may be established. In a second pass, a fine frequency correction may be performed. In a third pass, phase variation may be tracked and corrected using a minimum set of pilot symbols.

5. 发明申请

US20160043769A1 DIFFERENTIATOR BASED SPREAD SPECTRUM MODULATOR 审中-公开
公开(公告)号：US20160043769A1
公开(公告)日：2016-02-11
申请号：US14922016
申请日：2015-10-23
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Kern Wai Wong
IPC分类号： H04B1/7087 , H04B1/7156
CPC分类号： H04B1/7087 , H03L7/0995 , H03L7/235 , H04B1/7073 , H04B1/7156 , H04B15/04
摘要： A spread spectrum clock generator which includes a pulse train generator circuit and a modulating circuit configured to produce a modulating signal relating to a time derivative of an output of the pulse train generator circuit. In one embodiment the modulating circuit includes a active differentiator circuit and in another embodiment the modulating circuit includes a passive differentiator circuit. A modulator is included which is configured to produce a spread spectrum clock output which is frequency modulated by the modulating signal.

6. 发明申请

US20150271770A1 APPARATUS AND METHOD FOR ESTABLISHING UPLINK SYNCHRONIZATION IN A WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：在无线通信系统中建立上行同步的装置和方法
公开(公告)号：US20150271770A1
公开(公告)日：2015-09-24
申请号：US14733068
申请日：2015-06-08
申请人： Pantech Co., Ltd.
发明人： Kibum KWON , Myungcheul JUNG
IPC分类号： H04W56/00 , H04W74/00 , H04W76/04
CPC分类号： H04W56/0005 , H04B1/7087 , H04L5/0007 , H04L5/001 , H04W56/0045 , H04W74/004 , H04W76/27 , H04W88/08 , H04W92/10
摘要： Uplink synchronization establishment in a base station which operates a plurality of component carriers according to one embodiment of the present description, is performed in that the base station is connected to a user equipment, sets component carrier aggregation information, generates an uplink timing groups in the set component carrier aggregation, and transmits information on the thus-generated uplink timing groups to the user equipment.
摘要翻译：执行根据本说明书的一个实施例的操作多个分量载波的基站中的上行链路同步建立，其中基站连接到用户设备，设置分量载波聚合信息，生成上行链路定时组设置分量载波聚合，并将由此生成的上行链路定时组的信息发送给用户设备。

7. 发明授权

US09054835B2 Apparatus and method for establishing uplink synchronization in a wireless communication system 有权
标题翻译：一种用于在无线通信系统中建立上行链路同步的装置和方法
公开(公告)号：US09054835B2
公开(公告)日：2015-06-09
申请号：US13578531
申请日：2011-02-10
申请人： Kibum Kwon , Myungcheul Jung
发明人： Kibum Kwon , Myungcheul Jung
IPC分类号： H04J3/06 , H04L5/00 , H04W56/00 , H04W88/08 , H04W92/10 , H04B1/7087
CPC分类号： H04W56/0005 , H04B1/7087 , H04L5/0007 , H04L5/001 , H04W56/0045 , H04W74/004 , H04W76/27 , H04W88/08 , H04W92/10
摘要： Uplink synchronization establishment in a base station which operates a plurality of component carriers according to one embodiment of the present description, is performed in that the base station is connected to a user equipment, sets component carrier aggregation information, generates an uplink timing groups in the set component carrier aggregation, and transmits information on the thus-generated uplink timing groups to the user equipment.
摘要翻译：执行根据本说明书的一个实施例的操作多个分量载波的基站中的上行链路同步建立，其中基站连接到用户设备，设置分量载波聚合信息，生成上行链路定时组设置分量载波聚合，并将由此生成的上行链路定时组的信息发送给用户设备。

8. 发明授权

US08798030B2 Facilitating uplink synchronization in TD-SCDMA multi-carrier systems 有权
标题翻译：促进TD-SCDMA多载波系统中的上行同步
公开(公告)号：US08798030B2
公开(公告)日：2014-08-05
申请号：US12909723
申请日：2010-10-21
申请人： Tom Chin , Guangming Shi , Kuo-Chun Lee
发明人： Tom Chin , Guangming Shi , Kuo-Chun Lee
IPC分类号： H04W56/00
CPC分类号： H04W56/0005 , H04B1/7087
摘要： Uplink synchronization processes in multi-carrier time division-synchronous code division multiple access (TD-SCDMA) systems include determining uplink transmission timing for a first carrier frequency and performing uplink synchronization on the other carrier frequencies based on the transmission timing of the first carrier frequency. The transmission timing may be adjusted based on a timing offset that is measured between the received downlink pilot signals of the various carrier frequencies. User equipment may perform uplink synchronization individually with each of the carriers serviced by a particular Node B after receiving synchronization information regarding those carrier frequencies.
摘要翻译：多载波时分同步码分多址（TD-SCDMA）系统中的上行链路同步过程包括确定第一载波频率的上行链路传输定时，并且基于第一载波频率的传输定时在其它载波频率上执行上行链路同步。可以基于在各种载波频率的接收的下行链路导频信号之间测量的定时偏移来调整发送定时。在接收到关于这些载波频率的同步信息之后，用户设备可以与由特定节点B所服务的每个载波分别执行上行链路同步。

9. 发明授权

US08594153B2 Spread-spectrum receiver with progressive fourier transform 有权
标题翻译：具有渐进傅里叶变换的扩频接收机
公开(公告)号：US08594153B2
公开(公告)日：2013-11-26
申请号：US11739377
申请日：2007-04-24
申请人： Scott A. McDermott
发明人： Scott A. McDermott
IPC分类号： H04B1/69 , H04B1/707 , H04B1/713
CPC分类号： H04B1/7087 , H04B1/7075 , H04L5/0023
摘要： A receiving system dynamically searches the communications band for transmissions of messages having the same nominal communications parameters, including the use of the same spreading code, but having potentially different specific frequencies and code-phases. The receiver, which is independent of the transmitters, samples the communications band at each code-phase of the spreading code over a span of downconverted transmission frequencies. When a message element is detected at a particular code-phase and frequency, it is forwarded to a demodulator that demodulates the message and sends it to its intended destination. In a preferred embodiment, a progressive Fourier Transform is used to incrementally determine the power level at each successive code-phase at a given frequency, thereby substantially reducing the time required to search for transmissions at each discrete code-phase.
摘要翻译：接收系统动态地搜索通信频带中具有相同标称通信参数的消息的传输，包括使用相同的扩展码，但具有潜在不同的特定频率和码相位。独立于发射机的接收机在下变频传输频率的跨度上在扩展码的每个码相处采样通信频带。当在特定码相和频率处检测到消息元素时，它被转发到解调器，解调器将其发送到其预定的目的地。在优选实施例中，逐行傅里叶变换被用于在给定频率处逐步确定每个连续码相的功率电平，从而大大减少在每个离散码相处搜索传输所需的时间。

10. 发明申请

US20130272344A1 METHOD AND APPARATUS FOR PACKET ACQUISITION 有权
标题翻译：分组获取的方法和装置
公开(公告)号：US20130272344A1
公开(公告)日：2013-10-17
申请号：US13772234
申请日：2013-02-20
申请人： ADEPTENCE LLC
发明人： Ismail Lakkis
IPC分类号： H04B1/7105
CPC分类号： H04B1/711 , H04B1/707 , H04B1/7087 , H04B1/7093 , H04B1/7105 , H04B2201/7073 , H04B2201/7097 , H04J13/0014 , H04J13/107
摘要： Certain aspects of the present disclosure relate to a method for acquisition of a received spread spectrum signal transmitted over a wired or wireless medium.
摘要翻译：本公开的某些方面涉及用于获取通过有线或无线介质传输的接收扩频信号的方法。

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