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1. 发明申请

US20090072900A1 APPARATUS AND METHOD FOR COMPENSATING FOR NONLINEARITY IN PORTABLE COMMUNICATION TERMINAL 审中-公开
标题翻译：用于补充便携式通信终端中非线性的装置和方法
公开(公告)号：US20090072900A1
公开(公告)日：2009-03-19
申请号：US12233275
申请日：2008-09-18
申请人： Hyung-Weon PARK , Seung-Hwan Kim , Shin-Ho Kim
发明人： Hyung-Weon PARK , Seung-Hwan Kim , Shin-Ho Kim
IPC分类号： H03F1/32 , H04L5/14
CPC分类号： H04L27/367 , H03F1/32 , H03F1/3282 , H03F3/24 , H03F2200/447 , H03F2200/451 , H03F2200/468 , H04L27/2626
摘要： An apparatus and method for compensating for nonlinearity of a portable communication terminal are provided. The apparatus includes a modem for modulating Transmission (Tx) data, a Digital Pre-Distortion (DPD) mode controller for obtaining power level information and for determining a power on/off state of a DPD unit by using the obtained information in the Tx mode, and the DPD unit for outputting the modulated data input from the modem without performing a DPD operation when power is off, and for outputting the modulated data input from the modem by performing the DPD operation when power is on.
摘要翻译：提供了一种用于补偿便携式通信终端的非线性的装置和方法。该装置包括用于调制传输（Tx）数据的调制解调器，数字预失真（DPD）模式控制器，用于通过使用获得的Tx模式的信息来获得功率电平信息和用于确定DPD单元的电源接通/断开状态 DPD单元，用于在电源关闭时输出从调制解调器输入的调制数据，而不执行DPD操作，并且用于在电源接通时通过执行DPD操作输出从调制解调器输入的调制数据。

2. 发明授权

US08457246B2 Apparatus and method for envelope tracking power amplifier in wireless communication system 有权
标题翻译：无线通信系统中包络跟踪功率放大器的装置及方法
公开(公告)号：US08457246B2
公开(公告)日：2013-06-04
申请号：US12876555
申请日：2010-09-07
申请人： Shin-Ho Kim , Hyung-Weon Park
发明人： Shin-Ho Kim , Hyung-Weon Park
IPC分类号： H04L27/00
CPC分类号： H04L27/366 , H03F1/0266
摘要： An apparatus and method for amplifying a Transmit (Tx) signal according to an Envelope Tacking (ET) scheme in a wireless communication system are provided. A transmitting end apparatus includes an envelope gain controller for controlling a gain of a digital baseband Tx signal in accordance with power control, a detector for detecting an envelope signal from the digital baseband Tx signal whose gain is controlled, and for shaping on the envelope signal, a first Digital to Analog Converter (DAC) for converting the shaped envelope signal into an analog signal, and an envelope modulator for generating a drain bias of a power amplifier that amplifies a Radio Frequency (RF) Tx signal by using the analog envelope signal. Accordingly, a digital-based ET scheme is implemented, and by using a plurality of shaping tables, efficiency of the ET scheme can be maximized in a transmitting end that uses power control.
摘要翻译：提供了一种用于在无线通信系统中根据信封贴（ET）方案放大发送（Tx）信号的装置和方法。发送端装置包括：包络增益控制器，用于根据功率控制来控制数字基带Tx信号的增益;检测器，用于检测来自其增益被控制的数字基带Tx信号的包络信号，以及对包络信号进行整形，用于将成形包络信号转换为模拟信号的第一数模转换器（DAC）和用于产生放大射频（RF）Tx信号的功率放大器的漏极偏置的包络调制器，该功率放大器通过使用模拟包络信号。因此，实现基于数字的ET方案，并且通过使用多个整形表，可以在使用功率控制的发送端最大化ET方案的效率。

3. 发明授权

US08548092B2 Method and apparatus for reducing peak to average power ratio using peak windowing 有权
标题翻译：使用峰值窗口降低峰均功率比的方法和装置
公开(公告)号：US08548092B2
公开(公告)日：2013-10-01
申请号：US13004271
申请日：2011-01-11
申请人： In-Tae Kang , Jung-Hwa Bae , Jung-Uk Woo , Shin-Ho Kim , Sang-Min Bae , Jong-Han Lim , Dong-Min Kim , Bo-Rham Lee
发明人： In-Tae Kang , Jung-Hwa Bae , Jung-Uk Woo , Shin-Ho Kim , Sang-Min Bae , Jong-Han Lim , Dong-Min Kim , Bo-Rham Lee
IPC分类号： H04K1/02
CPC分类号： H04L27/2624
摘要： A method and apparatus for reducing a Peak to Average Power Ratio (PAPR) using peak windowing is provided. In the apparatus, an absolute value calculator calculates an absolute value of an input signal, a subtractor subtracts a predetermined clipping threshold level from the absolute value, a smoothing unit performs smoothing on the subtracted signal according to a predetermined smoothing scheme and outputs a first smoothed signal, an adder adds the first smoothed signal to the clipping threshold level, an inverse calculator outputs a second smoothed signal by multiplying the clipping threshold level by an inverse of the added signal, and a multiplier outputs a final PAPR-reduced signal by multiplying the input signal by the second smoothed signal. The method and apparatus address an overcompensation problem while processing signals having a large bandwidth and a high data rate without delay, thereby minimizing the clipping influences on Bit Error Rate (BER) and Adjacent Channel Leakage Ratio (ACLR) performances.
摘要翻译：提供了一种使用峰值窗口降低峰均功率比（PAPR）的方法和装置。在设备中，绝对值计算器计算输入信号的绝对值，减法器根据绝对值减去预定的限幅阈值电平，平滑单元根据预定的平滑方案对减法信号进行平滑处理，并输出第一个平滑信号，加法器将第一平滑信号与削波阈值电平相加，逆计算器通过将削波阈值电平乘以相加信号的倒数来输出第二平滑信号，乘法器将最终的PAPR降低信号乘以输入信号由第二平滑信号。该方法和装置在不延迟地处理具有大带宽和高数据速率的信号的同时解决过度补偿问题，从而最小化对误码率（BER）和相邻信道泄漏比（ACLR）性能的削波影响。

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