Complex sentence: The pulse may be coded in order to reduce the chance that the range-finder can be jammed and it is possible to use doppler techniques to judge whether the object is moving towards or away from the range-finder, and if so how fast.
Split into simpler sentences: The pulse may be coded in order to reduce the chance that the range-finder can be jammed. It is possible to use Doppler effect techniques to judge whether the object is moving towards or away from the range-finder, and if so how fast.