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1.发明公开METHOD AND SYSTEM FOR UPDATING MULTI-FREQUENCY-BAND PRE-DISTORTION COEFFICIENT LOOKUP TABLE 有权用于更新多频带预 - 降系数表格的方法和系统
公开(公告)号：EP2924938A4
公开(公告)日：2016-08-17
申请号：EP13857235
申请日：2013-07-17
发明人： XIONG JUN , DUAN TAO , SUN HUARONG , XIAO PENG
IPC分类号： H04L25/49
CPC分类号： H04L1/0043 , H03F1/3241 , H03F1/3247 , H03F3/245 , H04L1/0036 , H04L25/03159 , H04L25/03343 , H04L25/49 , H04L27/2646 , H04L27/367
摘要： Disclosed are a method and a system for updating a multi-frequency band pre-distortion coefficient lookup table, in order to solve the problems that the calculation complexity of a multi-frequency band pre-distortion coefficient is high and the calculated pre-distortion coefficient is unstable. Wherein, the method comprises: collecting a first frequency band reference signal and a first frequency band feedback signal, and a second frequency band reference signal and a second frequency band feedback signal; calculating a first frequency band pre-distortion coefficient and a second frequency band pre-distortion coefficient, according to the first frequency band reference signal and the first frequency band feedback signal, and the second frequency band reference signal and the second frequency band feedback signal; performing phase calibration on the first frequency band pre-distortion coefficient and the second frequency band pre-distortion coefficient, respectively; and updating a first lookup table according to the first frequency band pre-distortion coefficient performed the phase calibration, and updating a second lookup table according to the second frequency band pre-distortion coefficient performed the phase calibration. The embodiments of the present application simplify the calculation process, and the calculated pre-distortion coefficient is more accurate.
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公开(公告)号：EP2947833A4
公开(公告)日：2016-08-17
申请号：EP13871392
申请日：2013-12-25
发明人： XIONG JUN , ZHANG YONGLI , XUE BIN
CPC分类号： H04B1/0475 , H03F1/3247 , H04B1/62 , H04B2001/0433 , H04L25/49 , H04L27/368
摘要： The present invention discloses a digital predistortion processing method and system. The method includes: extracting a predistortion parameter corresponding to an input signal from a predistortion coefficient parameter list to perform predistortion processing on the input signal to obtain a forward sending signal; performing power amplification processing on the forward sending signal to obtain an output signal; collecting the output signal to obtain a feedback signal; collecting the forward sending signal after delaying for a preset number of sampling points to obtain a reference signal; performing synchronous correlation calculation on the reference signal and the feedback signal to calibrate the feedback signal; training a predistortion coefficient according to the reference signal and the calibrated feedback signal; and forming a predistortion coefficient parameter list according to the predistortion coefficient and the amplitude of the input signal. In this embodiment, the transmission signal is delayed for a preset number of sampling points to greatly perfect the radio frequency index ACPR.
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3.发明公开
公开(公告)号：EP3089414A4
公开(公告)日：2016-11-02
申请号：EP14873505
申请日：2014-12-24
发明人： XIONG JUN , WANG XINMIN , DUAN TAO , WANG JINGYI
CPC分类号： H04B1/62 , H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/24 , H03F3/245 , H03F2200/198 , H03F2201/3209 , H03F2201/3224 , H03F2201/3227 , H03F2201/3233 , H04B1/04 , H04B1/0475 , H04B2001/0416 , H04B2001/0425 , H04L25/49 , H04L27/367 , H04L27/368
摘要： The present application relates to the field of digital pre-distortion processing. Disclosed in an embodiment of the present application are a pre-distortion parameter obtaining method and pre-distortion system for simplifying calculating complexity of a model while achieving good signal processing effect. The method comprises: after the beginning of periodic filtering processing, obtaining a pre-distorted signal after pre-distortion processing and a first feedback signal after power amplification (S101); obtaining a second feedback signal by eliminating the rated linear gain of the first feedback signal (S102); determining a pre-distortion parameter according to a matrix formed by the second feedback signal and a matrix formed by the pre-distorted signal (S103); updating the pre-distortion parameter index table according to the determined pre-distortion parameter (104).
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公开(公告)号：EP2938034A4
公开(公告)日：2016-09-28
申请号：EP13872950
申请日：2013-12-30
发明人： XIONG JUN , DUAN TAO , SUN HUARONG , XIAO PENG , WANG CE , WANG JIELI
CPC分类号： H04W52/243 , H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/19 , H03F3/245 , H03F2201/3233 , H04B1/0475 , H04L25/03343 , H04L25/49 , H04W52/16 , H04W52/52
摘要： Disclosed is a method and a system for switching pre-distortion coefficients, which is used to solve the problem of interference with neighbor cells due to the inferior pre-distortion coefficients. The method comprises: presetting a primary table and a standby table, wherein the primary table stores default pre-distortion coefficients and the standby table stores updated pre-distortion coefficients; when a data source of a pre-distortion processor adopts the standby table, adopting the updated pre-distortion coefficients to perform parameter output processing to acquire pre-distortion parameters, and conveying the pre-distortion parameters and an input signal to the pre-distortion processor to process to acquire pre-distortion signals; conveying the pre-distortion signals through various signal processors to acquire a first signal, and determining the power data of the first signal; if the power data of the first signal is more than or equal to a setting range, continuing to adopt the standby table as the data source of the pre-distortion processor; and if the power data of the first signal is less than setting range, switching the data source of the pre-distortion processor to the primary table.
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