本文讨论了数字微波设备的误码率与载干比之间的关系，得出了两者之间数学关系表达式。结果表明在满足一定误码率指标的前提下，随着接收电平的升高，允许干扰电平可以大幅度提高，而并非线性关系。这一点在工程上有非常重要的实用意义 This article discusses the relationship between the bit error rate and the carrier-to-interference ratio for digital microwave equipment, and gives the expressions for the mathematical relationship between the two. The results show that under the premise of meeting a certain bit error rate index, as the receiving level increases, the allowable interference level can be greatly improved, but not linear. This point in engineering has very important practical significance