Measuring method of airborne single-station passive positioning system on target radiation wavelength

Abstract

The invention discloses a measuring method of an airborne single-station passive positioning system on a measure target radiation wavelength. The measuring method comprises the following steps: making an airborne single-station passive probing platform do constant motion along a straight line; firstly, using the receiving front end to process received probing signals; then, sending the received probing signals into a digital signal processing unit; sending signal frequency values obtained through regular detection under the control of a synchronous clock into a memory; and calling the latest three frequency values from the memory by the data processing unit in a mode of automatic or manual commands under the triggering effect of the regular synchronous clock to measure the wavelength of the measured signals. The invention can accurately estimate and obtain the wavelength of the measure target radiation signals through the simple frequency measuring technology, and the measuring method can be applied to the execution of long distance positioning measuring tasks. However, an aerial measuring platform which has simple equipment and can not be supported by a ground measuring system can also be applicable to the monitoring management of aerial radio signals.

Description

technical field [0001] The invention belongs to the technical field of radio measurement, and specifically relates to an airborne single-station passive positioning system. By applying frequency measurement technology and comprehensively utilizing velocity relationship, Doppler frequency shift and rate-of-change equation, the wavelength of the radiation signal of the measured target can be accurately determined. Determination. Background technique [0002] China is gradually becoming a powerful country in the world. In order to promote the strategy of strengthening the military, it is necessary to establish a military force with a certain deterrent effect. The key to winning the war in the 21st century lies in the fastest and most accurate acquisition of intelligence. This includes the development of space-based intelligence and reconnaissance systems, especially long-range space-based intelligence and reconnaissance systems. Long-range space-based reconnaissance is still t...

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Problems solved by technology

This method only requires the airborne station to maintain a straight-line flight at a constant speed, and continuously track and measure the frequency spectrum, and after continuously obtaining three Doppler frequency difference measurement values, the distance of the measured target can be obtained through the calculation formula and relative azimuth, but the preliminary analysis also shows that the measurement error of this method is relatively large

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