专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2013082042A1 DISTRIBUTED ANTENNA SYSTEM AND METHOD FOR BANDWIDTH COMPRESSION AND TRANSPORT OF NONCONTIGUOUS SIGNAL FREQUENCY BLOCKS 审中-公开
标题翻译：分布式天线系统和非线性信号频带的带宽压缩和传输方法
公开(公告)号：WO2013082042A1
公开(公告)日：2013-06-06
申请号：PCT/US2012/066671
申请日：2012-11-27
申请人： DALI SYSTEMS CO. LTD , STAPLETON, Shawn Patrick
发明人： STAPLETON, Shawn Patrick , KIM, Wan-Jong
IPC分类号： H04B7/14
CPC分类号： H04L47/38 , H04B1/0007 , H04B1/40 , H04B1/50 , H04W72/04
摘要： A method for transporting communications signals includes receiving an analog IF signal at a first unit. The analog IF signal includes a first carrier having a first frequency and a first bandwidth and a second carrier having a second frequency different from the first frequency and a second bandwidth. The analog IF signal is converted to a digitally sampled IF signal having the first carrier located in a first Nyquist zone, the second carrier located in a second Nyquist zone, an image of the first carrier located in a third Nyquist zone, and an image of the second carrier located in the third Nyquist zone. The image of the first carrier and the image of the second carrier is transmitted from the first unit to a second unit, where the image of the first carrier and the image of the second carrier is then converted to the analog IF signal.
摘要翻译：用于传送通信信号的方法包括在第一单元处接收模拟IF信号。模拟IF信号包括具有第一频率和第一带宽的第一载波和具有不同于第一频率和第二带宽的第二频率的第二载波。模拟IF信号被转换成具有第一载波位于第一奈奎斯特区的第二载波的数字采样IF信号，位于第二奈奎斯特区的第二载波，位于第三奈奎斯特区的第一载波的图像，位于第三奈奎斯特区的第二载体。第一载波的图像和第二载波的图像从第一单元发送到第二单元，其中第一载波的图像和第二载波的图像然后被转换为模拟IF信号。

2. 发明申请

WO2009031042A2 N-WAY DOHERTY DISTRIBUTED POWER AMPLIFIER 审中-公开
标题翻译： N-Way DOHERTY分布式功率放大器
公开(公告)号：WO2009031042A2
公开(公告)日：2009-03-12
申请号：PCT/IB2008/003079
申请日：2008-04-23
申请人： DALI SYSTEMS, CO., LTD. , KIM, Wan-Jong , CHO, Kyoung-Joon , STAPLETON, Shawn, patrick , KIM, Jong-Heon
发明人： KIM, Wan-Jong , CHO, Kyoung-Joon , STAPLETON, Shawn, patrick , KIM, Jong-Heon
IPC分类号： H03F1/02 , H03F3/19 , H04B7/00 , H04J11/00
CPC分类号： H03F1/0288 , H03F1/02 , H03F1/3223 , H03F1/3241 , H03F1/56 , H03F3/24 , H03F3/604 , H03F3/607 , H04B2001/0425 , H04B2001/0441 , H04B2001/045
摘要： A power amplifier using N-way Doherty structure for extending the efficiency region over the high peak-to-average power ratio of the multiplexing modulated signals such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. In an embodiment, the present invention uses a dual-feed distributed structure to an N-way Doherty amplifier to improve the isolation between at least one main amplifier and at least one peaking amplifier and, and also to improve both gain and efficiency performance at high output back-off power. Hybrid couplers can be used at either or both of the input and output. In at least some implementations, circuit space is also conserved due to the integration of amplification, power splitting and combining.
摘要翻译：公开了一种使用N路Doherty结构的功率放大器，用于在诸如宽带码分多址和正交频分复用的复用调制信号的高峰值与平均功率比之间扩展效率区域。在一个实施例中，本发明使用双向馈电分布式结构到N路Doherty放大器，以改善至少一个主放大器与至少一个峰化放大器之间的隔离，并且还提高高电平的增益和效率性能输出回退电源。混合耦合器可以在输入和输出中的任一个或两者上使用。在至少一些实现中，由于放大，功率分配和组合的集成，电路空间也是保守的。

3. 发明申请

WO2008154077A1 DIGITAL HYBRID MODE POWER AMPLIFIER SYSTEM 审中-公开
标题翻译：数字混合模式功率放大器系统
公开(公告)号：WO2008154077A1
公开(公告)日：2008-12-18
申请号：PCT/US2008/061355
申请日：2008-04-23
申请人： DALI SYSTEMS, CO., LTD. , KIM, Wan-Jong , CHO, Kyoung-joon , STAPLETON, Shawn, Patrick , KIM, Jong-Heon , YANG, Dali
发明人： KIM, Wan-Jong , CHO, Kyoung-joon , STAPLETON, Shawn, Patrick , KIM, Jong-Heon , YANG, Dali
IPC分类号： H04B1/02
CPC分类号： H04B1/0475 , H03F1/0288 , H03F1/3247 , H03F3/24 , H03F2200/57 , H03F2201/3224 , H03F2201/3233 , H04B1/0014 , H04B1/0039 , H04B1/0067
摘要： A RF-digital hybrid mode power amplifier system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier in the RF domain. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by the narrowband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, the present invention could compensate the nonlinearities as well as memory effects of the power amplifier systems and also improve performances, in terms of power added efficiency, adjacent channel leakage ratio and peak-to-average power ratio. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels. As a result, the digital hybrid mode power amplifier system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems, where baseband I-Q signal information is not readily available.
摘要翻译：公开了一种用于在宽带通信系统中实现高效率和高线性度的RF数字混合模式功率放大器系统。本发明基于对RF域中的功率放大器进行线性化的自适应数字预失真的方法。诸如放大器输出信号的线性度和不对称失真的功率放大器特性由窄带反馈路径监测并由数字模块中的自适应算法控制。因此，本发明可以补偿功率放大器系统的非线性和存储器效应，并且在功率附加效率，相邻信道泄漏比和峰均功率比方面也提高了性能。本公开使得功率放大器系统能够是现场可重新配置的并且支持多调制方案（调制不可知），多载波和多信道。结果，数字混合模式功率放大器系统特别适用于诸如基站，中继器和室内信号覆盖系统之类的无线传输系统，其中基带I-Q信号信息不容易获得。

4. 发明申请

WO2016161438A1 METHOD AND SYSTEM FOR LINK SYNCHRONIZATION IN AN LTE-TDD ARCHITECTURE 审中-公开
标题翻译： LTE-TDD架构链路同步的方法与系统
公开(公告)号：WO2016161438A1
公开(公告)日：2016-10-06
申请号：PCT/US2016/025900
申请日：2016-04-04
申请人： DALI SYSTEMS CO. LTD. , DALI WIRELESS, INC.
发明人： KIM, Wan-Jong , STAPLETON, Shawn Patrick
IPC分类号： G01R21/133 , G01R21/06 , G01R35/04
CPC分类号： H04W56/0095 , H04B7/04 , H04B17/318 , H04L5/14 , H04L25/03 , H04W56/00
摘要： A method of detecting a synchronization switching pulse using a power detector in a time division duplexing (TDD) system includes receiving an input signal, detecting a power level associated with the input signal using a digital power meter, and determining a configuration associated with the input signal. The method also includes determining that a pulse width associated with the input signal is greater than a threshold, determining an offset associated with a special subframe configuration, and generating an estimated sync pulse. The method further includes forming a regenerated sync pulse, determining an error between the estimated sync pulse and the regenerated sync pulse, determining that the error is less than a threshold, and providing a lock detect.
摘要翻译：在时分双工（TDD）系统中使用功率检测器检测同步切换脉冲的方法包括接收输入信号，使用数字功率计检测与输入信号相关联的功率电平，以及确定与输入相关联的配置信号。该方法还包括确定与输入信号相关联的脉冲宽度大于阈值，确定与特殊子帧配置相关联的偏移，以及生成估计的同步脉冲。该方法还包括形成再生的同步脉冲，确定估计的同步脉冲和再生的同步脉冲之间的误差，确定误差小于阈值，并提供锁定检测。

5. 发明申请

WO2013044238A1 SYSTEM AND METHOD FOR INCREASING BANDWIDTH FOR DIGITAL PREDISTORTION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS 审中-公开
标题翻译：用于增加多通道宽带通信系统中数字预测的带宽的系统和方法
公开(公告)号：WO2013044238A1
公开(公告)日：2013-03-28
申请号：PCT/US2012/056918
申请日：2012-09-24
申请人： DALI SYSTEMS CO. LTD.
发明人： KIM, Wan-Jong , STAPLETON, Shawn Patrick
IPC分类号： H03F1/26
CPC分类号： H04B1/0475 , H03F1/3241 , H03F1/3247 , H04B1/0017 , H04B2001/0425 , H04L27/368
摘要： A digital predistortion linearization method is provided for increasing the instantaneous or operational bandwidth for RF power amplifiers employed in wideband communication systems. Embodiments of the present invention provide a method of increasing DPD linearization bandwidth using a feedback filter integrated into existing digital platforms for multi-channel wideband wireless transmitters. An embodiment of the present invention utilizes a DPD feedback signal in conjunction with a low power band-pass filter in the DPD feedback path.
摘要翻译：提供数字预失真线性化方法来增加在宽带通信系统中使用的RF功率放大器的瞬时或者操作带宽。本发明的实施例提供了一种使用集成到用于多信道宽带无线发射机的现有数字平台中的反馈滤波器来增加DPD线性化带宽的方法。本发明的一个实施例利用DPD反馈信号与DPD反馈路径中的低功率带通滤波器相结合。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式