The pulse Doppler radar (PDR) is an ultra wideband radar system, not only can detect the target location, but also measure the radial velocity through the Doppler effect. However, the conventional radar signal processing techniques and the limit calculation don't match the storage resources of typical wireless sensor particle. By using miniature pulse Doppler radars as the sensor nodes, the compatibility of PDR with miniature wireless sensor nodes has been studied through the design of a new target tracking system. This system is composed of several PDR sensor nodes to detect the presence and position of the moving target, one base station node is used to collect the detection data from the sensor nodes, and an algorithm to estimate the location of the object. The results show that the system has smaller deviation, but it is enough to realize the target tracking.