Otherwise , a bi - stable nonlinear system can be connected to the matched filter , and by adjusting the system parameters , the system will keep in single state for the detection of binary or multi - nary code , so that the detection performance can be remarkably improved in a wide range of sampling period 如果匹配滤波器的采样周期没有达到理想情况,则在它之前连一个双稳势的非线性系统,然后选择合适的参数使此系统始终处于单稳态,再对二进制或多进制码元信号进行检测,即使采样周期变化程度较大,检测性能也会得到显著的改善。