Performance of a range-ambiguous MTI and doppler filter system

In this report the clutter rejection performance of a range-ambiguous MTI and doppler filter system is analyzed. The reduction of correlation time in a range-ambiguous system in general improves the clutter rejection performance. However, due to the fold-over phenomenon, a far-away target has to compete with the near-in clutter; hence, a higher improvement factor is required. Examples presented here which take into account these effects show that the improvement factor of a range-ambiguous MTI system is slightly better than that of a range-unambiguous system. However, the performance of a doppler filter processor in a range-ambiguous system is worse.