低复杂度子带数字预畸变用于非连续频谱接入中杂波发射抑制
Low-Complexity Sub-band Digital Predistortion for Spurious Emission Suppression in Noncontiguous Spectrum Access
AI总结：
本文提出一种低复杂度子带数字预畸变方案，针对非连续频谱传输方案在低成本设备中的应用，旨在减少处理复杂度并有效抑制杂波互调失真。
摘要：
非连续传输方案与高功率效率需求对无线电发射机和功率放大器（PA）的设计和实现提出了巨大挑战。由于PA的非线性特性，可能会产生严重的 unwanted emissions，这可能会干扰邻近信道信号，甚至导致FDD收发机自身接收机的灵敏度下降。本文提出了一种低复杂度的子带DPD解决方案，专门针对低成本设备中的非连续频谱传输方案。该技术旨在仅抑制PA输出中的选定杂波互调失真成分，从而在处理复杂度上显著低于经典线性化解决方案。此外，还提出了新的基于去相关参数学习解决方案，并进行了公式化，这些方案在参数估计计算复杂度上有所降低，并能够自适应跟踪时变特征。通过使用商用LTE-Advanced移动PA进行了全面的仿真和射频测量，以评估和验证所提出方案在实际场景中的有效性。获得的结果表明，使用所提出方案可以实现高效的杂波成分抑制。
英文摘要：
Noncontiguous transmission schemes combined with high power-efficiency requirements pose big challenges for radio transmitter and power amplifier (PA) design and implementation. Due to the nonlinear nature of the PA, severe unwanted emissions can occur, which can potentially interfere with neighboring channel signals or even desensitize the own receiver in frequency division duplexing (FDD) transceivers. In this article, to suppress such unwanted emissions, a low-complexity sub-band DPD solution, specifically tailored for spectrally noncontiguous transmission schemes in low-cost devices, is proposed. The proposed technique aims at mitigating only the selected spurious intermodulation distortion components at the PA output, hence allowing for substantially reduced processing complexity compared to classical linearization solutions. Furthermore, novel decorrelation based parameter learning solutions are also proposed and formulated, which offer reduced computing complexity in parameter estimation as well as the ability to track time-varying features adaptively. Comprehensive simulation and RF measurement results are provided, using a commercial LTE-Advanced mobile PA, to evaluate and validate the effectiveness of the proposed solution in real world scenarios. The obtained results demonstrate that highly efficient spurious component suppression can be obtained using the proposed solutions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
