Linear power amplifier with a modified predistortion compensation for NCDMA applications

Y. Kao, Wei-Chung Chen
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Abstract

The selection of the matched transistor pair in a cascaded architecture for predistortion compensation is nontrivial. In this study, a modified architecture of predistortion with two paths is presented for the high power amplifier. The goal is to develop a 10W linear power amplifier with LDMOS transistor for 8 channels NCDMA repeater from 870 to 880MHz. With the modified scheme, the improvement of intermodulation is larger than 10dB and spurious is less than 50dBc.
用于NCDMA的改进预失真补偿线性功率放大器
在级联结构中选择匹配的晶体管对进行预失真补偿是非常重要的。本文提出了一种改进的双路径预失真结构,用于高功率放大器。目标是为870 ~ 880MHz的8通道NCDMA中继器开发一种10W LDMOS晶体管线性功率放大器。改进方案的互调性能改善大于10dB,杂散小于50dBc。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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