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公开(公告)号：US10063265B2
公开(公告)日：2018-08-28
申请号：US15291898
申请日：2016-10-12
Applicant: Analog Devices Global
Inventor： Patrick Pratt , Claire Masterson , Justine Mary McCormack
IPC: H04B1/04 , H04L27/36 , H04B1/7163 , H03F1/32
CPC classification number: H04B1/0475 , H03F1/3247 , H03F1/3258 , H04B1/71635 , H04B2001/0425 , H04L27/368
Abstract: A digital pre-distortion system can inversely model a power amplifier of a system to linearize the transmitter. A complex baseband model for digital pre-distortion based on a narrowband signal assumption is unworkable for an ultra wide band Cable television application. Predistortion can use a true wide band model including real-valued basis terms, obtained from a real-valued signal. When raised to a power, both even and odd harmonics or both odd or even other non-linear terms are represented and negative frequency fold-over can be accounted for. A Hilbert transform can be applied. Compressed sensing can be used to reduce the number of basis terms in the true real wide band model to generate a sparse model. Sparse equalization can be added to improve the stability of the digital pre-distortion system.
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公开(公告)号：US09379675B2
公开(公告)日：2016-06-28
申请号：US14282484
申请日：2014-05-20
Applicant: ANALOG DEVICES GLOBAL
Inventor： Eamon Nash , Mingming Zhao , Ovidiu Vasile Balaj , Peadar Antony Forbes , Claire Masterson
CPC classification number: H03F1/52 , H03F1/0222 , H03F1/0266 , H03F3/195 , H03F3/24 , H03F3/72 , H03F2200/102 , H03F2200/18 , H03F2200/192 , H03F2200/195 , H03F2200/426 , H03F2200/435 , H03F2200/451 , H03F2203/7215 , H03F2203/7221
Abstract: Aspects of this disclosure relate to protecting a circuit, such as an amplifier, from transient overdrive events and/or average overdrive events. In one embodiment, an indication of average power, such as root mean squared (RMS) power of a radio frequency (RF) signal, can be compared to a first threshold and an indication of a peak RF power can be compared to a second threshold. When the indication of average power exceeds the first threshold, an average overdrive event can be detected. When the indication of peak power exceeds the second threshold, a peak overdrive event can be detected. If either a transient overdrive event or an average overdrive event is detected, a circuit, such as an amplifier, can be protected.
Abstract translation: 本公开的方面涉及保护诸如放大器的电路免受瞬态过驱动事件和/或平均过驱动事件的影响。 在一个实施例中，能够将射频（RF）信号的平均功率（诸如均方根（RMS））功率的指示与第一阈值进行比较，并且峰值RF功率的指示可以与第二阈值进行比较 。 当平均功率的指示超过第一阈值时，可以检测平均过驱动事件。 当峰值功率的指示超过第二阈值时，可以检测峰值过驱动事件。 如果检测到瞬态过驱动事件或平均过驱动事件，则可以保护诸如放大器的电路。
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公开(公告)号：US20150236658A1
公开(公告)日：2015-08-20
申请号：US14282484
申请日：2014-05-20
Applicant: Analog Devices Global
Inventor： Eamon Nash , Mingming Zhao , Ovidiu Vasile Balaj , Peadar Antony Forbes , Claire Masterson
CPC classification number: H03F1/52 , H03F1/0222 , H03F1/0266 , H03F3/195 , H03F3/24 , H03F3/72 , H03F2200/102 , H03F2200/18 , H03F2200/192 , H03F2200/195 , H03F2200/426 , H03F2200/435 , H03F2200/451 , H03F2203/7215 , H03F2203/7221
Abstract: Aspects of this disclosure relate to protecting a circuit, such as an amplifier, from transient overdrive events and/or average overdrive events. In one embodiment, an indication of average power, such as root mean squared (RMS) power of a radio frequency (RF) signal, can be compared to a first threshold and an indication of a peak RF power can be compared to a second threshold. When the indication of average power exceeds the first threshold, an average overdrive event can be detected. When the indication of peak power exceeds the second threshold, a peak overdrive event can be detected. If either a transient overdrive event or an average overdrive event is detected, a circuit, such as an amplifier, can be protected.
Abstract translation: 本公开的方面涉及保护诸如放大器的电路免受瞬态过驱动事件和/或平均过驱动事件的影响。 在一个实施例中，能够将射频（RF）信号的平均功率（诸如均方根（RMS））功率的指示与第一阈值进行比较，并且峰值RF功率的指示可以与第二阈值进行比较 。 当平均功率的指示超过第一阈值时，可以检测平均过驱动事件。 当峰值功率的指示超过第二阈值时，可以检测峰值过驱动事件。 如果检测到瞬态过驱动事件或平均过驱动事件，则可以保护诸如放大器的电路。
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