RTTH-HG宽带与射频信号干扰研究

Research Interference Between Broadband and RF Signal of RTTH-HG

针对RTTH-HG科研样机宽带与射频信号的干扰问题进行研究,分别对矢量幅度误差EVM、噪声系数NF、杂散Spurious等指标恶化现象深入分析。运用背景噪声公式进行理论计算,验证不同优化方案(对参考信号进行滤波、在网线接口处增加屏蔽消除串扰、调整中频频段范围等)对射频指标的优化结果。然后进行外场测试分析,得出最优方案,从单一制式推广到不同制式产品,使之性能显著提升,更具市场竞争力。

In this paper, the interference between broadband and RF signal of R3TH-HG is researched ,the deterioration phenomenon of indicators such as EVM,noise figure and spurious are analyzed. The noise floor formula theoretical calculation is used to verify optimization RF indicators in different scheme such as reference signal filtering,adding shielding in the cable interface to eliminate crosstalk and adjusting the IF frequency. Field test is conducted to obtain optimal solution,spreading to different standard products from a single system to promote the performance significantly and enhance the product more competitive.