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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.


The estimation error of speed v versus various maximal remainder error level τ
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f2-sensors-08-01343: The estimation error of speed v 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.


Range and Velocity Estimation of Moving Targets Using Multiple Stepped-frequency Pulse Trains
The estimation error of speed v versus various maximal remainder error level τ
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3927511&req=5

f2-sensors-08-01343: The estimation error of speed v 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

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.