Acoustic processor of the MCM sonar

Digital Signal Processing Applied to the Modernization Of Polish Navy Sonars

“…The shifts of echo signal phases in the modernized sonar MG-89DSP are made digitally [46]. A sinusoidal signal represented by its quadrature samples has its phase shifted by changing the proportions between sine and cosine samples.…”

“…Because the signals will be processed subsequent to the sampling for the purpose of time and space filtration, all channel sampling must be done synchronously in the same moments of time. To ensure the accurate timing of sampling, a number of independent converters are used rather than a single converter with input multiplexer, a common solution in other applications [46,57]. The accuracy of the process depends on the input signal staying constant throughout the conversion time.…”

“…The module's architecture was optimized to ensure that it meets sonar signal processing requirements and can multiply the number of modules if needed to increase computational power [46,57]. The module is easily programmable in the language C++ (alternatively to programming in the assembler) allowing fast implementation of algorithms pre-tested in the MATLAB environment [54].…”