摘要
在一定的信噪比下,二次差频测距法只有增加频点数才能增大测距范围或提高测距精度.本文从二次差频测距的基本原理出发详细推导了二次差频法正确测距对输出信噪比的要求,给出了测距精度与输出信噪比之间的关系,然后提出了一种新的差频测距算法———频差组合法,在相同的信噪比和频点数不增加的情况下,提高了测距性能.最后通过仿真,验证了该算法的有效性.
Quadric difference frequency needs more frequencies to range longer distance or to range more precisely under fixed SNR. The requirements of SNR to range correctly and the relationship between SNR and precision have been deduced in detail. Then a new method - combination frequency difference is proposed, which improves the performance of ranging under the same number of frequencies and the same condition. Finally simulated results verify the validity of the method.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2006年第6期1012-1015,共4页
Acta Electronica Sinica
关键词
多频测距
二次差频
信噪比
频差组合
multiple frequencies ranging
quadric difference
signal noise ratio
combination frequency difference
