| According to the shooting range's measuring requirements of the multi-targets environment , this paper illustrates the new radar possesses the ability of tracking multiple targets in a bunch of wave which has applied the pulse_compressed technology. Because the radar dosen't provide the linear-frequency-modulation's analog signals. It can't meet the anticipated result during debugging the radar , mending equipment and eliminating malfunction , and the ability of tracking multi-targets of the radar . So we design the linear-frequency-modulation's multi-target signal source .The radar containing the single carrier frequency applies the pulse-compressed system . The transmitter transmits linear-frequency-modulation's signals that is equal to 25us . It compresses the received wide pulse signals to 0, 3us narrow pulse signals , then the signal is processed . The above processes are not only improve the average power of the transmittor and the reflecting operating range , but also gain higher time-bandwidth accumulation and better range resolving power , provide efficient technology support to the target characteristic measuring .The multi-target signal source of the linear-frequency modulation is composed of the missile-contrail forming implement , range delaying-time circuit , high frequency signal source and the modulator of amplitude , azimuth , elevation . The analog signals of the single carrier frequency and the linear-frequency modulation , being together sent to the antenna's forepart by the power combiner and then coming by the HF system , IF and VF system , create the multi-target respondent wave . Since different-frequency singals are differentiated in two-circuited receiver , and the adopts the ranger's united time-pulse timing , the whole radar can achieve synchronization and offer the accurate range and error signals, drives the antenna to tracking normally, Accordingly , the dynamic multi-target environment is simulated by above processes . |
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