Positioning system only using Doppler information based on radar sensor network
A radar sensor and Doppler information technology, which is applied in the field of positioning technology using only target echo Doppler information, can solve problems such as difficulty in obtaining, failure, and increased computational complexity, and achieve high-precision two-dimensional positioning and fast two-dimensional positioning. The effect of dimensional positioning and complexity growth
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[0150] As an airport surface surveillance radar, the system locates multiple aircraft on the ground within the airport range. Set the radius of the circular area to be measured to 700m. Radar sensors are evenly arranged on a circle with a radius of 1000m starting from the north direction, and a total of 32 radar sensors form a network of radar sensors. The range of speed measurement is 1m / s to 30m / s. Let the number of targets in the scene be K. The target position is given by the polar coordinates (r k ,θ k ) description, the velocity is determined by the velocity magnitude v_A k and velocity direction v_θ k Description, the subscript k represents the kth target, k=1,2,...K. In step 1, the signal baseband sampling rate fs is 5000 Hz, and the number of sampling points Ns is 4096 points. The signal-to-noise ratio of the echo signal received by the radar is 10dB.
[0151] The central frequency of the transmitted signal of each radar sensor in the system is determined by t...
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