The question of the digital processing in the coherent pulse doppler radar which radiates the pulse complicated probing signal with a button type ambiguity diagram

Abstract

Introduction. The advantages of the pulse complicated signals using in the radar are well-known. These signals are signals with the high time security, the high power security or (and) the high structural security. The signal with the symmetrical linear frequency modulation, the signal with the triangular frequency modulation, the signal with the trapezoidal frequency modulation, the signal with the quadratic and with the cubic frequency intra -modulation and the signal with pseudorandom sequence have the button ambiguity function. Problem statement. It is necessary:

• To conduct the comparative estimation of the distance resolution and the range rate resolution (Doppler resolution) for signals with the button type ambiguity diagram;

• To develop recommendations for determination of the Doppler channels number;

Purpose of the article. To estimate the complication of the multichannel locations high-ways realization of echo signal as the multichannel Doppler-beat frequency highway on the base of matched filters or correlators. The analysis of complicated signals potential characteristics. Potential characteristics of the distance resolution and the range rate resolution for the signal with the symmetrical linear frequency modulation, the signal with the triangular frequency modulation, the signal with the trapezoidal frequency modulation, the signal with the quadratic and with the cubic frequency intra-modulation and the signal with pseudorandom sequence are analyzed. Conclusions to advantages of these pulse complicated signals with the button ambiguity function are drawn. Recommendations for determination of the Doppler channels number are developed. The complication of the multichannel locations highways realization of echo signal as the multichannel Doppler-beat frequency highway on the base of matched filters or correlators is estimated. The block diagrams analysis result testifies that the realization of the multichannel Doppler-beat frequency correlator is technically more difficult. In this scheme there is the difficult block with the formation of a probing signal with parallel releases of the so-called Doppler copies. Conclusions. The number of the Doppler channels in the radar locations highway deter-mined by maximum target velocity by the falling possible level of the noise immunity and of the distance resolution and the range rate resolution of probing signal that is used. The use of the considered complicated signals any types provides the identical number of processing channels. The use of the signal with pseudorandom sequence supports the high time security, the high power security and the high structural security.