Pulse Doppler radar ranging improvement method based on one-dimensional set method

Abstract

The invention relates to a pulse Doppler radar ranging improvement method based on a one-dimensional set method. The method includes the steps of establishing a finding table, and making each numerical value in the finding table be 0; obtaining the apparent distance threshold s[i] and the maximum fuzzy degree f[i] corresponding to the ith pulse repetition frequency P[i] of a radar transmitting signal; obtaining the apparent distance x[i] corresponding to the ith pulse repetition frequency P[i] of the radar transmitting signal according to a target echo signal; renewing the maximum fuzzy degree f[i] corresponding to the apparent distance threshold s[i] to obtain the renewed maximum fuzzy degree f[xi] corresponding to the apparent distance threshold s[i]; obtaining the qth element r[iq] of the distance unit sequence number set (please see the specifications), wherein the qth element r[iq] of the distance unit sequence number set (please see the specifications) is equal to the sum of x[i] and the product of q and q[i], and q is equal to 0, 1, 2...f[xi]; renewing the numerical value (please see the specifications) in the ith row and the R[i]th line of the finding table as 1, wherein R[i] is equal to r[i0], r[i1], r[i2]...r[if[xi]]; making j sequentially be 1, 2...N, and obtaining the distance A between a target and the pulse Doppler radar if the sum y[j] of all the numerical values in the jth line in the finding table is larger than or equal to L.

Description

technical field [0001] The invention belongs to the technical field of range ambiguity resolution by pulse Doppler, and in particular relates to an improved ranging method for pulse Doppler radar based on a one-dimensional set method, which is suitable for practical engineering applications. Background technique [0002] For a long time, range ambiguity resolution is a unique function of pulse Doppler radar. Pulse Doppler radar is a pulse radar that uses signal frequency domain characteristics to distinguish and detect targets. This signal processing method of pulse Doppler radar can obtain a near-optimal signal-to-noise ratio, and more accurate target distance and radial Velocity data, with good clutter suppression performance, has been more and more widely used in radar, especially in airborne radar. [0003] Pulse Doppler radar sends pulses of multiple frequencies alternately in the working cycle, so that the maximum unambiguous distance of each pulse is much smaller tha...

AI Technical Summary

Problems solved by technology

The look-up table method is simple and easy to implement, but as the distance measurement range of the target increases, the storage space requirement rapidly expands. During the table look-up process, a lot of time may be wasted on unnecessary distance values ​​according to the degree of division of distance units.

[0007] Among the above methods, the one-dimensional set method increases exponentially with the increase of the ranging range, and consumes a lot of time; the look-up table method increases exponentially with the increase of the ranging range. High requirements, when the storage space is insufficient, the ranging accuracy will be reduced accordingly

Therefore, in the process of dealing with the distance defuzzification problem, due to the limitation of time and storage space, the existing ranging methods have poor effectiveness and are no longer applicable.

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