Abstract: This paper analyses the problem of the quadratic phase for multiple frequency ranging based on chirp signal, and the method of the phase elimination is proposed. Ambiguity in ranging is resolved by the Chinese remainder theory. It is simple in algorithm, convenient to be realized and accurate. Simulation results indicate that this algorithm is accurate for ranging.

Key words: chirp signal, multiple frequency ranging, elimination of the phase, Chinese remainder theory

摘要： 分析了基于线性调频信号多频测距时出现的二次相位问题，提出了利用测速系统速度信息进行相位消除的方法。对于测距中出现的模糊问题，利用了中国余数定理(孙子定理)来解决。与传统算法相比，该算法具有简单、实现方便、测距精度高等特点。给出了仿真结果，表明该算法具有较高的测距精度。

关键词: 线性调频信号, 多频测距, 相位消除, 中国余数定理

CLC Number: 

• TN95