EFFECTS OF RECONSTRUCTION FILTERS IN DIGITAL PREDISTORTION LINEARIZERS FOR RF POWER-AMPLIFIERS

被引：24
|
作者：
SUNDSTROM, L [1 ]
FAULKNER, M [1 ]
JOHANSSON, M [1 ]
机构：
[1] VICTORIA UNIV TECHNOL,DEPT ELECT & ELECTR ENGN,MELBOURNE,VIC 3000,AUSTRALIA
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 1995年 / 44卷 / 01期
关键词：
D O I：
10.1109/25.350278
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The reconstruction filters are a major source of error in digital predistortion linearizers for RF power amplifiers, This paper presents a method that enables these filters to be designed for lowest filter complexity and minimum degradation of the linearizer performance. Furthermore, a method to choose an appropriate sampling rate for the predistorter is presented, Different filter approximations and orders are examined for different amplifier configurations by means of simulation, Of the filters tried, low-ripple Chebyshev and Butterworth filters perform best. It is demonstrated that it is possible to account for reasonable filter misalignment with only a small degradation in performance. It is also shown that the effect on the modulation is small with respect to intersymbol interference.
引用
收藏
页码：131 / 139
页数：9
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