本文介绍多卜勒导航雷达中信噪比门限判别的概念和功能及其通常采用的判别方法;并提出一种新的、简单可靠、性能良好的设计方案,实验和试验证明,此方案达到予想的结果。 This paper introduces the concept and function of S / N threshold in Doppler radars and its commonly used discriminating method. A new, simple, reliable and good performance design scheme is proposed. Experiments and experiments show that this scheme reaches the expected the result of.