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Patent Agency Ranking
1.发明公开公开(公告)号：US20230370098A1
公开(公告)日：2023-11-16
申请号：US18188216
申请日：2023-03-22
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Wan-Jong KIM , Shawn Patrick STAPLETON
CPC classification number: H04B1/0475 , H03F1/3241 , H03F1/3247 , H04B1/0017 , H04L27/368 , H04B2001/0425
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.
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公开(公告)号：US20220231714A1
公开(公告)日：2022-07-21
申请号：US17666357
申请日：2022-02-07
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.
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公开(公告)号：US20130094612A1
公开(公告)日：2013-04-18
申请号：US13705022
申请日：2012-12-04
Inventor： Wan-Jong KIM , Kyoung-Joon CHO , Shawn Patrick STAPLETON
IPC: H04B1/62
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.
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公开(公告)号：US20210376871A1
公开(公告)日：2021-12-02
申请号：US17403725
申请日：2021-08-16
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.
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公开(公告)号：US20200336161A1
公开(公告)日：2020-10-22
申请号：US16922773
申请日：2020-07-07
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.
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