-
公开(公告)号：US10256853B2
公开(公告)日：2019-04-09
申请号：US14918371
申请日：2015-10-20
Applicant: Dali Systems Co. Ltd.
Inventor： Wan-Jong Kim , Shawn Patrick Stapleton
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.
-
公开(公告)号：US20180227870A1
公开(公告)日：2018-08-09
申请号：US15820299
申请日：2017-11-21
Applicant: Dali Systems Co. Ltd.
Inventor： Wan-Jong Kim , Shawn Patrick Stapleton
IPC: H04W56/00 , H04L25/03 , H04B17/318 , H04B7/04 , H04L5/14
CPC classification number: H04W56/0095 , H04B7/04 , H04B17/318 , H04L5/0048 , H04L5/0053 , H04L5/14 , H04L5/1469 , H04L25/03 , H04L27/2656 , H04L27/2675 , H04W56/00 , H04W56/001 , H04W88/085
Abstract: 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.
-
公开(公告)号：US20160269210A1
公开(公告)日：2016-09-15
申请号：US14991264
申请日：2016-01-08
Applicant: Dali Systems Co. Ltd.
Inventor： Wan-Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
CPC classification number: H04W40/02 , H03F1/3247 , H03F3/24 , H03F2200/336 , H03F2200/57 , H03F2201/3224 , H03F2201/3233 , H04B1/0475 , H04B7/022 , H04B2001/0425 , H04L25/03343 , H04L27/2618 , H04L27/362 , H04L2025/03414 , H04W24/02 , H04W24/04 , H04W40/00 , H04W72/04 , H04W72/0453
Abstract: An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers.
-
公开(公告)号：US20160261294A1
公开(公告)日：2016-09-08
申请号：US14987093
申请日：2016-01-04
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Wan-Jong Kim , Shawn Patrick Stapleton
IPC: H04B1/04
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.
-
5.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：US09236897B2
公开(公告)日：2016-01-12
申请号：US14225673
申请日：2014-03-26
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Shawn Patrick Stapleton , Wan-Jong Kim
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。
-
Patent Agency Ranking
6.发明申请公开(公告)号：US20150180519A1
公开(公告)日：2015-06-25
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。
-
7.发明申请METHOD AND SYSTEM FOR BASEBAND PREDISTORTION LINEARIZATION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS 有权多通道宽带通信系统中基带预测线性化的方法与系统公开(公告)号：US20150092830A1
公开(公告)日：2015-04-02
申请号：US14480285
申请日：2014-09-08
Applicant: Dali Systems Co. Ltd.
Inventor： Wan-Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
CPC classification number: H04W40/02 , H03F1/3247 , H03F3/24 , H03F2200/336 , H03F2200/57 , H03F2201/3224 , H03F2201/3233 , H04B1/0475 , H04B7/022 , H04B2001/0425 , H04L25/03343 , H04L27/2618 , H04L27/362 , H04L2025/03414 , H04W24/02 , H04W24/04 , H04W40/00 , H04W72/04 , H04W72/0453
Abstract: An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers.
Abstract translation: 公开了一种使用诸如宽带码分多址和正交频分复用之类的有效复用调制技术在宽带通信系统中减少频谱再生长和补偿存储器效应的有效的基带预失真线性化方法。 本发明基于基于分段预均衡查找表的预失真的方法，该预失真是查找表预失真和分段预均衡器的级联。
-
公开(公告)号：US20130251066A1
公开(公告)日：2013-09-26
申请号：US13894987
申请日：2013-05-15
Inventor： Wan-Jong Kim , Kyoung-Joon Cho , Shawn Patrick Stapleton
IPC: H04B1/04
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：US08467747B2
公开(公告)日：2013-06-18
申请号：US13705022
申请日：2012-12-04
Inventor： Wan-Jong Kim , Kyoung-Joon Cho , Shawn Patrick Stapleton
IPC: H04B1/04
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。
-
公开(公告)号：US10727879B2
公开(公告)日：2020-07-28
申请号：US16240433
申请日：2019-01-04
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Wan-Jong Kim , Shawn Patrick Stapleton
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.
-
-
-
-
-
-
-
-
-
Search Results
49
records
(took 0.022 seconds)
