双极点滤波器的实现与改进

Implimentation and modification of the two pole filter

在扫描雷达的视频积累中，双极点滤波器是一种常用的积累器，它仅需很少的存贮量且易于实现．探讨了双极点滤波器在实现中的一些问题并对其进行了改进．结果表明，改进后的积累器提高了滤波器的稳定性，降低了对处理器的精度要求，而其性能仅下降０．１５ ｄＢ，因而具有较好的实用性．

The two pole filter is a commonly used integrator in the video integration of scanning radars. It requires little storage and is easy to implement. Some implementation issues are discussed and a modified integrator is proposed. It is shown that the improved integrator is more stable and it does not require a high precision processor. The optimum modified integrator requires only 0 15 dB increase in signal to noise ratio in order to provide the same detection capability as the optimum two pole filter. Therefore the modified integrator is more practical.