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1. 发明授权

US08542768B2 High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications 有权
标题翻译：高效，远程可重构的远程无线电头单元系统和无线通信方法
公开(公告)号：US08542768B2
公开(公告)日：2013-09-24
申请号：US12928943
申请日：2010-12-21
申请人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Ying Xiao
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Ying Xiao
IPC分类号： H04L25/49
CPC分类号： 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
摘要： A remote radio head unit (RRU) 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 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. As a result, the remote radio head system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems.
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。

2. 发明授权

US08509347B2 Method and system for baseband predistortion linearization in multi-channel wideband communication systems 有权
标题翻译：多通道宽带通信系统中基带预失真线性化的方法和系统
公开(公告)号：US08509347B2
公开(公告)日：2013-08-13
申请号：US13404679
申请日：2012-02-24
申请人： Wan Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
发明人： Wan Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
IPC分类号： H04K1/02
CPC分类号： 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
摘要： In some embodiments, a method of reducing adjacent channel power ratio and compensating memory effects of multi-channel wideband communication systems using multiplexing modulation techniques is provided. The method includes generating an address from samples of a baseband input signal of a communication system. The method also includes retrieving from a memoryless lookup table an entry in accordance with the address. The method further includes pre-equalizing the baseband input signal, the pre-equalization depending on one or more magnitudes of the input signal. The method still further includes multiplying the pre-equalized baseband input signal and the lookup table entry.
摘要翻译：在一些实施例中，提供了一种使用多路调制技术来减少相邻信道功率比并补偿多信道宽带通信系统的存储器效应的方法。该方法包括从通信系统的基带输入信号的采样中产生地址。该方法还包括根据该地址从无记忆查找表检索条目。该方法还包括基于输入信号的一个或多个幅度预均衡基带输入信号，预均衡。该方法还包括将预均衡的基带输入信号和查找表条目相乘。

3. 发明申请

US20130009707A1 N-WAY DOHERTY DISTRIBUTED POWER AMPLIFIER WITH POWER TRACKING 有权
标题翻译：具有电力跟踪功能的N-Way DOHERTY分布式功率放大器
公开(公告)号：US20130009707A1
公开(公告)日：2013-01-10
申请号：US13553967
申请日：2012-07-20
申请人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton
IPC分类号： H03F3/68
CPC分类号： H03F1/0288 , H03F1/0261 , H03F1/56 , H03F3/193 , H03F3/211 , H03F3/607 , H03F2200/451 , H03F2203/21106
摘要： A power amplifier using N-way Doherty structure with adaptive bias supply power tracking 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, 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：公开了一种使用具有自适应偏置电源功率跟踪的N路Doherty结构的功率放大器，用于在高峰值与平均功率之间扩展效率区域：多路调制信号比例，如宽带码分多址和正交频分复用。在一个实施例中，本发明使用双馈馈分布式结构到N路Doherty放大器来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，并且还可以在高输出下提高增益和效率性能后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。

4. 发明申请

US20090285194A1 Efficient Peak Cancellation Method for Reducing the Peak-To-Average Power Ratio in Wideband Communication Systems 审中-公开
标题翻译：用于降低宽带通信系统中的峰均功率比的高效峰值抵消方法
公开(公告)号：US20090285194A1
公开(公告)日：2009-11-19
申请号：US12415676
申请日：2009-03-31
申请人： Wan Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
发明人： Wan Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
IPC分类号： H04B7/216 , H04B7/00
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/19 , H03F3/20 , H03F3/24 , H03F2200/129 , H03F2200/451 , H03F2201/3224 , H03F2201/3227 , H03F2201/3233
摘要： An efficient peak cancellation method for reducing the peak-to-average power ratio in wideband communication systems uses repeated clipping and frequency domain filtering to achieve a desired peak-to-average power ratio for wideband code division multiple access and orthogonal frequency division multiplexing signals. The maximum magnitude of the filtered pulse is determined by a scaling factor which permits eliminating several iterations while still achieving convergence to the targeted peak-to-average power ratio, thereby reducing computational load and saving hardware resources. This results in improved performance in terms of error vector magnitude, adjacent channel leakage ratio and peak-to-average power ratio.
摘要翻译：用于降低宽带通信系统中的峰值与平均功率比的有效的峰值抵消方法使用重复的限幅和频域滤波来实现宽带码分多址和正交频分复用信号所需的峰值与平均功率比。经过滤波的脉冲的最大幅度由缩放因子决定，该比例因子可以消除多次迭代，同时仍然达到目标峰值与平均功率比的收敛，从而减少计算负荷并节省硬件资源。这导致在误差矢量幅度，相邻信道泄漏比和峰值与平均功率比方面的性能提高。

5. 发明申请

US20120154038A1 Multi-band wideband power amplifier digital predistorition system and method 有权
标题翻译：多波段宽带功率放大器数字预失真系统及方法
公开(公告)号：US20120154038A1
公开(公告)日：2012-06-21
申请号：US12928934
申请日：2010-12-21
申请人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton
IPC分类号： H03F1/26
CPC分类号： H04B1/0475 , H03F1/3247 , H03F2200/111 , H03F2200/451 , H04B1/62 , H04L27/2626 , H04L27/368
摘要： 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.
摘要翻译：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。

6. 发明申请

US20110156815A1 MODULATION AGNOSTIC DIGITAL HYBRID MODE POWER AMPLIFIER SYSTEM AND METHOD 有权
标题翻译：调制惯性数字混合模式功率放大器系统及方法
公开(公告)号：US20110156815A1
公开(公告)日：2011-06-30
申请号：US12928931
申请日：2010-12-21
申请人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Ying Xiao
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Ying Xiao
IPC分类号： H03F1/26
CPC分类号： H03F1/304 , H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/087 , H03F3/19 , H03F3/24 , H03F2200/18 , H03F2200/204 , H03F2200/207 , H03F2200/447 , H03F2200/451 , H03F2201/3206 , H03F2201/3209 , H03F2201/3212 , H03F2201/3215 , H03F2201/3224 , H03F2201/3227 , H04L25/067 , H04L25/08 , H04L27/0008 , H04L27/368 , H04W24/02
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 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。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。

7. 发明授权

US08811917B2 Digital hybrid mode power amplifier system 有权
标题翻译：数字混合模式功率放大器系统
公开(公告)号：US08811917B2
公开(公告)日：2014-08-19
申请号：US12108502
申请日：2008-04-23
申请人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Jong Heon Kim , Dali Yang
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Jong Heon Kim , Dali Yang
IPC分类号： H04B1/04
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/19 , H03F3/20 , H03F3/24 , H03F2200/129 , H03F2200/451 , H03F2201/3224 , H03F2201/3227 , H03F2201/3233
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。

8. 发明授权

US08804870B2 Modulation agnostic digital hybrid mode power amplifier system and method 有权
标题翻译：调制不可知数字混合模式功率放大器系统及方法
公开(公告)号：US08804870B2
公开(公告)日：2014-08-12
申请号：US12928931
申请日：2010-12-21
申请人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Ying Xiao
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Ying Xiao
IPC分类号： H03F1/34 , H03F1/32
CPC分类号： H03F1/304 , H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/087 , H03F3/19 , H03F3/24 , H03F2200/18 , H03F2200/204 , H03F2200/207 , H03F2200/447 , H03F2200/451 , H03F2201/3206 , H03F2201/3209 , H03F2201/3212 , H03F2201/3215 , H03F2201/3224 , H03F2201/3227 , H04L25/067 , H04L25/08 , H04L27/0008 , H04L27/368 , H04W24/02
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 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。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。

9. 发明授权

US08618883B2 N-way doherty distributed power amplifier with power tracking 有权
公开(公告)号：US08618883B2
公开(公告)日：2013-12-31
申请号：US13553967
申请日：2012-07-20
申请人： Kyoung Joon Cho , Wan Jong Kim , Shawn Patrick Stapleton
发明人： Kyoung Joon Cho , Wan Jong Kim , Shawn Patrick Stapleton
IPC分类号： H03F3/68
CPC分类号： H03F1/0288 , H03F1/0261 , H03F1/56 , H03F3/193 , H03F3/211 , H03F3/607 , H03F2200/451 , H03F2203/21106
摘要： A power amplifier using N-way Doherty structure with adaptive bias supply power tracking 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, 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.

10. 发明申请

US20120147993A1 METHOD AND SYSTEM FOR BASEBAND PREDISTORTION LINEARIZATION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS 有权
标题翻译：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：US20120147993A1
公开(公告)日：2012-06-14
申请号：US13404679
申请日：2012-02-24
申请人： Wan Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
发明人： Wan Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
IPC分类号： H04L25/49
CPC分类号： 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
摘要： In some embodiments, a method of reducing adjacent channel power ratio and compensating memory effects of multi-channel wideband communication systems using multiplexing modulation techniques is provided. The method includes generating an address from samples of a baseband input signal of a communication system. The method also includes retrieving from a memoryless lookup table an entry in accordance with the address. The method further includes pre-equalizing the baseband input signal, the pre-equalization depending on one or more magnitudes of the input signal. The method still further includes multiplying the pre-equalized baseband input signal and the lookup table entry.
摘要翻译：在一些实施例中，提供了一种使用多路调制技术来减少相邻信道功率比并补偿多信道宽带通信系统的存储器效应的方法。该方法包括从通信系统的基带输入信号的采样中产生地址。该方法还包括根据该地址从无记忆查找表检索条目。该方法还包括基于输入信号的一个或多个幅度预均衡基带输入信号，预均衡。该方法还包括将预均衡的基带输入信号和查找表条目相乘。

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