TY - JOUR N2 - The secretiveness of sonar operation can be achieved by using continuous frequency-modulated sounding signals with reduced power and significantly prolonged repeat time. The application of matched filtration in the sonar receiver provides optimal conditions for detection against the background of white noise and reverberation, and a very good resolution of distance measurements of motionless targets. The article shows that target movement causes large range measurement errors when linear and hyperbolic frequency modulations are used. The formulas for the calculation of these errors are given. It is shown that for signals with linear frequency modulation the range resolution and detection conditions deteriorate. The use of hyperbolic frequency modulation largely eliminates these adverse effects. L1 - http://www.journals.pan.pl/Content/89918/PDF/Journal10178-VolumeXIX%20Issue2_12paper.pdf L2 - http://www.journals.pan.pl/Content/89918 PY - 2012 IS - No 2 EP - 332 DO - 10.2478/v10178-012-0027-6 KW - silent sonar KW - frequency modulation KW - continuous wave KW - matched filtering KW - distance measurement KW - errors KW - Doppler effect A1 - Marszal, Jacek A1 - Salamon, Roman PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation DA - 2012 T1 - Distance Measurement Errors in Silent Fm-Cw Sonar with Matched Filtering SP - 321 UR - http://www.journals.pan.pl/dlibra/publication/edition/89918 T2 - Metrology and Measurement Systems ER -