-
41.发明申请SOFTWARE CONFIGURABLE DISTRIBUTED ANTENNA SYSTEM AND METHOD FOR BANDWIDTH COMPRESSION AND TRANSPORT OF SIGNALS IN NONCONTIGUOUS FREQUENCY BLOCKS 审中-公开软件可配置的分布式天线系统和方法用于非线性频率块中信号的带宽压缩和传输公开(公告)号：US20160226784A1
公开(公告)日：2016-08-04
申请号：US14960177
申请日：2015-12-04
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Shawn Patrick Stapleton , Wan-Jong Kim
IPC: H04L12/811 , H04B1/00
CPC classification number: H04L47/38 , H04B1/0007 , H04B1/40 , H04B1/50 , H04W72/04
Abstract: 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.
Abstract translation: 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。
-
42.发明申请SYSTEM AND METHOD FOR INCREASING BANDWIDTH FOR DIGITAL PREDISTORTION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS 审中-公开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：US20160191087A1
公开(公告)日：2016-06-30
申请号：US14918371
申请日：2015-10-20
Applicant: Dali Systems Co. Ltd.
Inventor： Wan-Jong Kim , Shawn Patrick Stapleton
CPC classification number: H04B1/0475 , H03F1/3241 , H03F1/3247 , H04B1/0017 , H04B2001/0425 , H04L27/368
Abstract: A method of operating a communications system includes receiving a signal at a digital predistorter (DPD), introducing predistortion to the signal using the DPD, and converting the predistorted signal to an analog signal using a digital-to-analog converter having a first bandwidth. The method also includes amplifying the analog signal, sampling the amplified signal using an analog-to-digital converter having a second bandwidth less than the first bandwidth, and extracting coefficients of the DPD from the sampled signal.
Abstract translation: 一种操作通信系统的方法包括在数字预失真器（DPD）处接收信号，使用DPD将预失真引入信号，以及使用具有第一带宽的数模转换器将预失真信号转换为模拟信号。 该方法还包括放大模拟信号，使用具有小于第一带宽的第二带宽的模数转换器对放大信号进行采样，以及从采样信号中提取DPD的系数。
-
公开(公告)号：US09379745B2
公开(公告)日：2016-06-28
申请号：US14553828
申请日：2014-11-25
Applicant: Dali Systems Co. Ltd.
Inventor： Wan-Jong Kim , Kyoung-Joon Cho , Shawn Patrick Stapleton
CPC classification number: H04B1/0475 , H03F1/3247 , H03F2200/111 , H03F2200/451 , H04B1/62 , H04L27/2626 , H04L27/368
Abstract: A high performance and cost effective method of RF-digital hybrid mode power amplifier systems with high linearity and high efficiency for multi-frequency band wideband communication system applications is disclosed. The present disclosure enables a power amplifier system to be field reconfigurable and support multiple operating frequency bands on the same PA system over a very wide bandwidth. In addition, the present invention supports multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels.
-
公开(公告)号：US09258022B2
公开(公告)日：2016-02-09
申请号：US14552231
申请日：2014-11-24
Applicant: Dali Systems Co. Ltd.
Inventor： Wan-Jong Kim , Shawn Patrick Stapleton
CPC classification number: H04B1/0475 , H03F1/02 , H03F1/3241 , H03F3/24 , H04B1/0017 , H04B2001/0425 , H04B2001/0433 , H04B2001/045
Abstract: 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.
Abstract translation: 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。
-
Patent Agency Ranking
45.发明授权System and method for increasing bandwidth for digital predistortion in multi-channel wideband communication systems 有权用于增加多通道宽带通信系统中数字预失真的带宽的系统和方法公开(公告)号：US09197259B2
公开(公告)日：2015-11-24
申请号：US14480267
申请日：2014-09-08
Applicant: Dali Systems Co. Ltd.
Inventor： Wan-Jong Kim , Shawn Patrick Stapleton
CPC classification number: H04B1/0475 , H03F1/3241 , H03F1/3247 , H04B1/0017 , H04B2001/0425 , H04L27/368
Abstract: 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.
Abstract translation: 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。
-
公开(公告)号：US08903337B2
公开(公告)日：2014-12-02
申请号：US13894987
申请日：2013-05-15
Inventor： Wan-Jong Kim , Kyoung-Joon Cho , Shawn Patrick Stapleton
CPC classification number: H04B1/0475 , H03F1/3247 , H03F2200/111 , H03F2200/451 , H04B1/62 , H04L27/2626 , H04L27/368
Abstract: A high performance and cost effective method of RF-digital hybrid mode power amplifier systems with high linearity and high efficiency for multi-frequency band wideband communication system applications is disclosed. The present disclosure enables a power amplifier system to be field reconfigurable and support multiple operating frequency bands on the same PA system over a very wide bandwidth. In addition, the present invention supports multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels.
Abstract translation: 公开了一种用于多频带宽带通信系统应用的具有高线性度和高效率的RF数字混合模式功率放大器系统的高性能和成本有效的方法。 本公开使得功率放大器系统能够在现场可重新配置并且在非常宽的带宽上支持相同PA系统上的多个工作频带。 此外，本发明支持多调制方案（调制不可知），多载波和多信道。
-
47.发明授权Software configurable distributed antenna system and method for bandwidth compression and transport of signals in noncontiguous frequency blocks 有权软件可配置的分布式天线系统和方法，用于在非连续频率块中进行信号的带宽压缩和传输公开(公告)号：US08724664B2
公开(公告)日：2014-05-13
申请号：US13686036
申请日：2012-11-27
Applicant: Dali Systems Co. Ltd.
Inventor： Shawn Patrick Stapleton , Wan-Jong Kim
IPC: H04J3/04
CPC classification number: H04L47/38 , H04B1/0007 , H04B1/40 , H04B1/50 , H04W72/04
Abstract: 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.
Abstract translation: 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。
-
48.发明申请HIGH EFFICIENCY, REMOTELY RECONFIGURABLE REMOTE RADIO HEAD UNIT SYSTEM AND METHOD FOR WIRELESS COMMUNICATIONS 有权高效，远程可重新配置的远程无线电头单元系统和无线通信方法公开(公告)号：US20140079153A1
公开(公告)日：2014-03-20
申请号：US14020425
申请日：2013-09-06
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Wan-Jong Kim , Kyoung-Joon Cho , Shawn Patrick Stapleton , Ying Xiao
IPC: H04B1/04
CPC classification number: H04B1/0475 , H03F1/3247 , H03F3/24 , H03F3/68 , H03F2201/3224 , H04B1/0064 , H04W24/02 , H04W84/047 , H04W88/08 , H04W88/085 , Y02D70/00 , Y02D70/122 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/146 , Y02D70/40
Abstract: A remote radio head unit (RRU) system is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier inside the RRU. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by a wideband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, embodiments of the present invention can compensate for the nonlinearities as well as memory effects of the power amplifier systems and also improve performance, 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, multi-frequency bands and multi-channels. Consequentially, the remote radio head system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems.
Abstract translation: 公开了一种远程无线电头单元（RRU）系统。 本发明基于对RRU内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非对称失真的功率放大器特性由宽带反馈路径监测并由数字模块中的自适应算法控制。 因此，本发明的实施例可以补偿功率放大器系统的非线性以及存储器效应，并且在功率附加效率，相邻信道泄漏比和峰值与平均功率比方面也提高性能。 本公开使得功率放大器系统能够是现场可重构的并且支持多调制方案（不可调制调制），多载波，多频带和多信道。 因此，远程无线电头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。
-
公开(公告)号：US20140010168A1
公开(公告)日：2014-01-09
申请号：US13686036
申请日：2012-11-27
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Shawn Patrick Stapleton , Wan-Jong Kim
IPC: H04W72/04
CPC classification number: H04L47/38 , H04B1/0007 , H04B1/40 , H04B1/50 , H04W72/04
Abstract: 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.
-
-
-
-
-
-
-
-
Search Results
49
records
(took 0.022 seconds)
