级联对消技术研究

Cascade Cancellation Technology

对级联对消技术进行研究,介绍了同频干扰自适应对消的基本思想和数学模型。为获得较高的对消比,在工程应用环境中研究并采用了可行的级联对消方案。同时,阐述级联对消的系统架构、实现流程和保持对消环路稳定的要求,研究了实际对消环路中关键单元硬件的实现方法。最后,利用实际对消环路进行对消测试实验。实验结果表明,级联对消能够实现60 d B以上的对消比,满足了实际工程的使用需要,对解决同频干扰等类似问题有较大的工程借鉴作用。

The cascade cancellation technology is studied,and the basic idea and mathematical model of the adaptive cancellation of the same frequency interference introduced.In order to acquire a fairly high cancellation ratio,the feasible cascade cancellation scheme is studied and applied in the engineering application environment.Then the system architecture,implementation process and stability requirements of the cancellation loop are described,and the hardware implementations of the key units in the actual cancellation loop also discussed.Finally,the cancellation test with actual cancellation loop is done.The experimental results indicate that the cascade cancellation could achieve a cancellation ratio of more than60dB,and this could also meet the needs of practical engineering,and is of great engineering reference to solving the similar problems such as co-frequency interference.