Range and Velocity Estimation of Moving Targets Using Multiple Stepped-frequency Pulse Trains
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ABSTRACT
Range and velocity estimation of moving targets using conventional stepped-frequency pulse radar may suffer from the range-Doppler coupling and the phase wrapping. To overcome these problems, this paper presents a new radar waveform named multiple stepped-frequency pulse trains and proposes a new algorithm. It is shown that by using multiple stepped-frequency pulse trains and the robust phase unwrapping theorem (RPUT), both of the range-Doppler coupling and the phase wrapping can be robustly resolved, and accordingly, the range and the velocity of a moving target can be accurately estimated. No MeSH data available. |
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f3-sensors-08-01343: The estimation error of range r versus various maximal remainder error level τ Mentions: According to the derivation in the previous section, one can calculate that Γ = 6x109, Γ1 =3 and Γ2 =2. The maximal determinable speed is / vmax / =120m/s according to (10). We consider the maximal remainder error levels τ =0, 1, 2, 3, 4, 5 and let P=128 that satisfies (11). In Fig. 2, the error between the estimate vˆ in (13) and the true value of v and the error upper bound in (14) versus various τ are plotted, and they are marked by « and *, respectively. In Fig. 3, the error between the estimate rˆ in (15) and the true value of r and the error upper bound in (16) versus various τ are plotted, and they are marked by « and *, respectively. In Fig. 2 and Fig. 3, τ =0 means high SCNR (signal-to-clutter-noise ratio) case while the larger τ means low SCNR case, and the results are obtained by 100 trials. One can see the proposed algorithm robustly provides small estimation errors, even when the remainders are erroneous. |
View Article: PubMed Central - PubMed
Range and velocity estimation of moving targets using conventional stepped-frequency pulse radar may suffer from the range-Doppler coupling and the phase wrapping. To overcome these problems, this paper presents a new radar waveform named multiple stepped-frequency pulse trains and proposes a new algorithm. It is shown that by using multiple stepped-frequency pulse trains and the robust phase unwrapping theorem (RPUT), both of the range-Doppler coupling and the phase wrapping can be robustly resolved, and accordingly, the range and the velocity of a moving target can be accurately estimated.
No MeSH data available.