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4.     EXPERIMENTS

  A simulation experiment was performed to verify the performance of the proposed algorithm.   16 equally-spaced targets were placed in the same range gate as shown in Figure 1.   A Kaiser window was applied to each burst in the processing.   Image quality parameters of the good targets such as impulse response width, maximum side lobe ratio, geometric registration, and phase at the theoretical peak position were measured.   It was found that these parameters agreed with their theoretical values.

Figure 3 shows part of the output from IFFTs 1 & 2, corresponding to targets 1 to 10.   Two divisions where the targets change from complete to incomplete are shown, at targets 5 & 9.   The good targets are then selected from each IFFT, as shown in the bottom part of Figure 3.

Figure 4 shows the impulse response of Target T3 in S1 and S2.   From the figure, it is clear why this target is a good one in S1, but rejected in S2.
  

FIG 4

Figure 4: Impulse Response of Target


ian cumming                 Fri Sep 5 16:48:53 PDT 1997