论文部分内容阅读
射频功率放大器的向量开关数字预失真模型存在因所在区域样本点不足而引起的不连续问题。提出一种基于向量开关模型的数字预失真改进方法,该方法通过加入区域权重的约束条件以及交叠的区域划分方法对向量开关模型进行优化,达到消除向量开关模型不连续问题,提高模型的稳定性。仿真实验中采用30MHz的LTE信号进行实验,当原方法出现不连续时新方法可消除间断点,同时在邻道泄漏比(ACLR)指标上有近6dB改善,结果表明其具有更好的鲁棒性。
The digital predistortion model of the vector-switching RF power amplifier has the problem of discontinuity caused by the lack of sample points in the area of RF power amplifier. An improved digital predistortion method based on vector switch model is proposed in this paper. This method optimizes the vector switch model by adding constraints of region weight and overlapping region partition method, so as to eliminate the discontinuity problem of vector switch model and improve the stability of the model Sex. Experiments using 30MHz LTE signal in the simulation experiment show that the new method can eliminate the discontinuity point when the original method is discontinuous and has an improvement of nearly 6dB on the adjacent channel leakage ratio (ACLR) index. The result shows that it has better robustness Sex.