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Adaptive detection of multifrequency radar signals

Keywords:

D.I. Popov – Dr. Sc. (Eng.), Professor, Ryazan State Radio Engineering University. E-mail: adop@mail.ru


In the article the quasi-optimum estimating algorithm and measuring instrument of multifrequency radar signal Doppler phase and detection system with adaptive accumulation of signal are synthesized. The analysis of the synthesized measuring instrument and detection system of multifrequency signal modeling on the computer is carried out. Based on a simplified expression for the optimal decision statistics in each frequency channel synthesized estimation algorithm and the corresponding measuring instrument the Doppler phase. Study of the properties of the estimates obtained by statistical computer simulation showed the possibility of their use in the detection systems with adaptive accumulation of signal. For optimal detection of multifrequency signals systems an algorithm of adaptive signal accumulation is offered. The goal of the algorithm is to reduce the number of Doppler channels in each frequency channel or the same number of channels Doppler mismatch between channels to avoid inter-channel losses. The resulting computer simulation results confirm the accuracy of the proposed algorithms. Block diagram system of the adaptive accumulation of signal for a single frequency channel is shown. Adaptation of the noise parameters is done in an adaptive filter matrix, in which the output samples in the meter Doppler phase calculated desired estimate. In the adaptive coherent storage calculated weight vectors whose projections are used in a weight summation matrix filter output samples. Signal detection is performed on the results of the subsequent comparison of modular values with the corresponding detection thresholds. In general, the results of simulation confirm the accuracy of the synthesized processing algorithms in the frequency channels and the proposed principles for constructing the corresponding systems of adaptive detection of multifrequency signals. Thus synthesized quasi-optimal estimation algorithm and the corresponding measuring instrument of Doppler multifrequency signal phase allows obtaining corresponding estimates in each frequency channel. Research properties of these estimates showed the possibility of their use in the detection systems with adaptive accumulation of signal, reduces the number of Doppler channels in each frequency channel or by the same number of channels Doppler detuning between the channels, eliminating inter-channel losses.
References:

 

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  2. Popov D.I. Obnaruzhenie-izmerenie mnogochastotnykh radiolokacionnykh signalov // Vestnik Rjazanskogo gosudarstvennogo radiotekhnicheskogo universiteta. 2012. № 39-2. S. 40−48.
  3. Popov D.I. Optimizacija sistem kogerentno-vesovojj obrabotki mnogochastotnykh signalov // Cifrovaja obrabotka signalov. 2013. № 4. S. 17−21.
  4. Popov D.I. Adaptivnye rezhektornye filtry s avtokompensaciejj doplerovskojj fazy pomekhi // Vestnik Rjazanskojj gosudarstvennojj radiotekhnicheskojj akademii. 2003. № 12. S. 10−14.
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  8. Popov D.I. Sintez obnaruzhitelejj-izmeritelejj dopplerovskikh signalov // Izvestija vuzov. Radioehlektronika. 1999. T. 42. № 4. S. 11−17.
  9. Pat. № 2165627 Rossijjskojj Federacii. MPK7G 01 R 25/00. Doplerovskijj fazometr mnogochastotnykh signalov / Popov D.I.,Belokrylov A.G.; zajavl. 24.01.2000; opubl. 20.04.2001. Bjul. № 11. 11 s.
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