【摘要】 数字预失真技术具有低功耗、低成本、结构紧凑、稳定、高效、自适应等优点,是改善功率放大器线性度最有效的方法之一;但在实际应用中,由于链路上存在正交调制误差,使得数字预失真改善的效果不能达到预期的效果,甚至使结果恶化。针对这个问题,提出一种正交调制校正的设计与实现方案,并将其应用到数字预失真系统中。仿真结果表明,经正交调制校正后能改善数字预失真的性能,降低数字预失真对链路精度的要求。更多还原

【Abstract】 Digital pre-distortion has the advantages of low power consumption,compact structure,strong self-adaptive ability,high stability and efficiency,which is one of the most effective ways to improve the linearity of power amplifiers,but in practical application,the desired effect of digital pre-distortion can not be realized due to the orthogonal modulation error in the link. Aiming at the problem,a design and implementation scheme of quadrature modulation correction based on microblaze embedded system was proposed in this paper. The simulation results show that the digital predistortion with quadrature modulation compensation could improve its function and reduce the demand of digital pre-distortion to link accuracy.更多还原