N2 - The article presents methods that help in the elimination of mutual clutter as well as the consequences of two FM sounding signal sonars operating in the same body of water and frequency band. An in-depth analysis of mutual clutter was carried out. The effects of sounding signal differentiation were determined, as was the Doppler effect on mutual clutter suppression. One of the methods analysed is of particular interest in a situation in which collaborating sonars are operating in opposite frequency modulation directions. This method is effective for both linear and hyperbolic frequency modulations. A formula was derived, identifying exactly how much quantities of clutter may be lessened. The work included comprehensive computer simulations and measurements as well as tests in real-life conditions. L1 - http://journals.pan.pl/Content/103498/PDF/aoa-2016-0069.pdf L2 - http://journals.pan.pl/Content/103498 PY - 2016 IS - No 4 EP - 729 DO - 10.1515/aoa-2016-0069 KW - sonar KW - signal processing KW - FM KW - LFM KW - HFM KW - clutter KW - crosstalk A1 - Marszal, Jacek A1 - Rudnicki, Mariusz A1 - Jedel, Andrzej A1 - Salamon, Roman A1 - KochaƄska, Iwona PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 41 DA - 2016 T1 - Mutual Clutter Suppression Techniques for FM Sonars SP - 721 UR - http://journals.pan.pl/dlibra/publication/edition/103498 T2 - Archives of Acoustics