Method for removing broadband noise interference signal cross positioning false points

Abstract

The invention discloses a method for removing broadband noise interference signal cross positioning false points, belonging to the field of electronic reconnaissance. The self-correlation property ofthe broadband noise signals is utilized, the false points generated by the direction-finding cross positioning are eliminated, and the three-dimensional positioning problem is solved by utilizing twoobservation stations. The method comprises performing the target position estimation by means of the orientation and pitching angle information obtained by the direction finding of a radiation sourceby utilizing a high-precision direction finding device; calculating the time difference of the signals which can be transmitted by the estimation point to the two observation stations by means of theposition relation between the estimation point and the observation stations; sampling the signals received by the two observation stations integrally, performing the cross-correlation operation on thepremise that the mixed signals are not separated to obtain the time difference information of the real target reaching the two observation stations; and taking the time difference measurement error as a threshold value, comparing the time different information one by one, and screening out the real target to obtain the coordinate position. According to the invention, the signal characteristic isfully utilized, and the signal processing process is simplified.

Description

Technical field [0001] The invention relates to a method for removing false points of cross positioning of broadband noise interference signals, and belongs to the field of electronic reconnaissance. Background technique [0002] Passive positioning systems use electronic reconnaissance receivers. The equipment itself does not emit electromagnetic signals, but only receives signals emitted by the target, and uses the signal information as the basis for all processing data and generating positioning results. The passive positioning system has stronger anti-interference ability and the system has a longer range. [0003] Among a variety of passive positioning methods, the direction finding cross positioning method is simple in principle, easy to implement, and fast in positioning. The current high-resolution array direction finding technology can quickly and accurately obtain the angle information of multiple targets. In actual scenes, the azimuth information changes slowly, the me...

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Problems solved by technology

For the elimination of false points, Chen Hong (Journal of Air Force Engineering University, Volume 12, No. 1, February 2011, false point elimination algorithm based on redundant information) proposed a data association using azimuth or time difference redundant information, More than three observation stations are required. Compared with the dual-station positioning system adopted in this patent, the inter-station communication of this method is more complicated, and the utilization process of time difference redundant information in this paper is more complicated and the amount of ca

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