Radar azimuth pulse frequency multiplication system and using method thereof

Abstract

The invention discloses a radar azimuth pulse frequency multiplication system. Radar azimuth pulse lengths are counted by using a high-frequency clock; the count values are equally divided into N parts, wherein N is a radar azimuth frequency multiplication coefficient; a pulse is generated within the equally divided radar azimuth pulse count value; and the pulse is an azimuth pulse after the frequency multiplication is performed. By the system, the problem of lock loss is avoided; the performance is stable and reliable; accumulation and averaging are performed by utilizing the count values of the current azimuth cycle and the conventional azimuth cycle; the randomness of output azimuths caused by a change process of rotating speed of an antenna is reduced; and simultaneously, the rotating situation of the current antenna can also be embodied.

Description

technical field [0001] The invention relates to the technical field of frequency multiplication of pulse signals, in particular to a frequency multiplication circuit for realizing radar azimuth pulses and a method for using the same, which are mainly applied to radar display terminals. Background technique [0002] At present, when the antenna of some radars, especially the navigation radar, rotates one circle, the number of azimuth pulses output by the azimuth code disc is relatively small, generally 128 or 360, which is difficult to meet the display terminal’s requirements for azimuth accuracy (4096 or 8192 azimuth pulses). Require. In this case, it is usually necessary to perform frequency multiplication processing on the azimuth pulse signal output by the antenna on the radar display terminal. [0003] Existing solutions usually use a phase-locked loop circuit to achieve frequency multiplication, such as figure 1 As shown, the phase-locked loop circuit is mainly compos...

AI Technical Summary

Problems solved by technology

Once the frequency of the input azimuth pulse changes and exceeds the capture range of the phase-locked loop, the phase-locked loop will lose lock, resulting in errors in the frequency-multiplied azimuth pulse. Due to the wind effect and other reasons, the azimuth pulse frequency output by the navigation radar antenna is often not constant during the rotation process.

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