Pulse Compression - MATLAB Simulations for Radar Systems Design - page 236

Clearly, the target returns overlap and, thus, they are not resolved. However,
after pulse compression the two pulses are completely separated and are
resolved as two distinct targets. In fact, when using LFM, returns from neigh-
boring targets are resolved as long as they are separated in time by , the
compressed pulsewidth. This figure can be reproduced using MATLAB pro-
gram Ðfig5_3.mÑ given in Listing 5.1 in Section 5.5.

τ n 1

Figure 5.3a. Composite echo signal for two unresolved targets.

Figure 5.3b. Composite echo signal corresponding to Fig. 5.3a, after
pulse compression.