Changing the Delay of the Analog-Digital Conversion in Reduce the Leakage Signal Effect

The research of reduction the leakage signal effect in short range radiolocation system is considered. LFM signal is used as a probe signal. The structure of the differential frequency signal and the structure of operating harmonic are shown for the spectral method of processing the useful signal. To reduce the leakage signal effect, it is proposed to use subsampling of the useful signal with a variable delay of the clock signal of the analog-to-digital converter. The dependence between the level of the parasitic component of the operating harmonic signal, due to the leakage signal effect, and the delay of the clock signal of the analog-digital converter, is given. The clock signal of the analog-digital converter is generated by a microcontroller timer. The timer is initialized in pulse width modulation mode. The required delay of the clock signal of the analog-digital converter is selected by changing the threshold of the timer. For testing the algorithm, a microwave module K-LC5 and a prototype board with a microcontroller STM32F407 are used

References

[1] Gorbatov K. On construction of long-range movement sensor based on K-LC6 24 GHz module of RFbeam company. Komponenty i tekhnologii [Components & Technologies], 2016, no. 7, pp. 34–36 (in Russ.).

[2] Gorbatov K. On exact range meters from Texas Instruments and Silicon Radar. Komponenty i tekhnologii [Components & Technologies], 2018, no. 2, pp. 6–10 (in Russ.).

[3] Ozturk E., Genschow D., Yodprasit U., et al. Measuring target range and velocity: developments in chip, antenna, and packaging technologies for 60-GHz and 122-GHz industrial radars. IEEE Microw. Mag., 2017, vol. 18, no. 7, pp. 26–39. DOI: 10.1109/MMM.2017.2738468

[4] Ozturk E., Genschow D., Yodprasit U., et al. A 60 GHz SiGe BiCMOS monostatic transceiver for radar applications. IEEE MTT-S IMS, 2017, pp. 1408–1411. DOI: 10.1109/MWSYM.2017.8058880

[5] Vasilyev D.A., Kichigin A.A., Shakhtarin B.I. Realization of a noise immunity algorithm for detecting obstacles on the trajectory of unmanned aerial vehicles. SYNCHROINFO, 2018, pp. 1–4. DOI: 10.1109/SYNCHROINFO.2018.8457036

[6] Myakochin Yu., Biryukov M. Car radars for 24- and 77-GHz frequency bands. Elektronika: nauka, tekhnologiya, biznes [Electronics: Science, Technology, Business], 2018, no. 8, pp. 84–88 (in Russ.).

[7] Ju Y., Jin Y., Lee J. Design and implementation of a 24 GHz FMCW radar system for automotive applications. Int. Radar Conf., 2014, pp. 1–4. DOI: 10.1109/RADAR.2014.7060385

[8] Anishchenko L.N., Razevig V.V. Two-channel bioradar for stress monitoring. PIERS-Toyama, 2018, pp. 983–987. DOI: 10.23919/PIERS.2018.8597844

[9] Gagnon A. Field trial results using a novel integration of unique millimeterwave Doppler radar for high performance non-obtrusive life sign (breathing and heart beating) monitoring of high suicide risk prisonner in observation cell. IEEE ICCST, 2016, pp. 1–9. DOI: 10.1109/CCST.2016.7815682

[10] Butler W. Design considerations for intrusion detection wide area surveillance radars for perimeters and borders. IEEE Conf. Tech. Homeland Security, 2008, pp. 47–50. DOI: 10.1109/THS.2008.4534421

[11] Skolnik M.I. Radar handbook. McGraw-Hill Education, 2008.

[12] Kogan I.M. Blizhnyaya radiolokatsiya [Short-range radiolocation]. Moscow, Sovetskoe Radio Publ., 1973.

[13] Gonorovskiy I.S. Chastotnaya modulyatsiya i ee primenenie [Frequency modulation and its application]. Moscow, Svyaz’izdat Publ., 1948.

[14] Vinitskiy A.S. Ocherk osnov radiolokatsii pri nepreryvnom izluchenii radiovoln [Basics of continuous wave radar location]. Moscow, Sovetskoe radio Publ., 1961.

[15] Klimashev B.M., Petrov I.P. Ustroystva blizhney lokatsii s nepreryvnymi signalami [Short-range location devices with continuous signals]. Kuybyshev, Kuybyshev KPtI Publ., 1974.

[16] Kichigin A.A., Yurenev A.V. Subsampling in reducing leakage signal effect. Herald of the Bauman Moscow State Technical University, Series Instrument Engineering, 2018, no. 1, pp. 21–30 (in Russ.). DOI: 10.18698/0236-3933-2018-1-21-30