| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 106 === In the context of electronic warfare, electronic counter-devices on military vehicles must achieve high sensitivity and high direction-finding accuracy for radio waves, and can effectively combat advanced radar equipment. Because of its low computational complexity and simple principle, the phase interferometer algorithm is often used in direction finding technology. Direction of the signal is estimated by the phase difference received between two antennas and uses interferometer algorithm to solve ambiguity. In the one-dimensional phase interferometer nonlinear antenna array system, If the baseline is lengthened, the accuracy of the angle of the estimated signal can be more accurate, but the probability of ambiguity will also increase. At this time, we have to choose the best trade-off to get lowest root mean square error (RMSE). We use mathematical derivation to propose an RMSE formula for algorithms. By using the RMSE formula, we can simulate and choose the optimal array ratio between the receivers in the AWGN channel.
In addition, we choose three different algorithms according to the difference in the value of the angle of the direction. By deriving its RMSE formula and comparing its performance, we can use this RMSE formula to compare the advantages and disadvantages. Finally, the optimal array ratio of RMSE minimization is proposed by this RMSE formula.
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