Single side band modulation and bandpass subsampling

• Autorzy: Poćwiardowski P. , Kobylarz P.
• Języki publikacji: EN

Abstrakty

EN

Paper describes the efficient method of gaining information from beamformer based on band subsampling technique. In active sonar systems, where centre (carrier) frequency is known (neglecting the Doppler shift), it is feasible to use the subsampling techniques, widely used elsewhere. The subsampling techniques can be used for narrow band signals. One of the advantages of this method lays in the use of noiseless heterodyne in mixer circuit, which provides errorless signal shifting to zero frequency. The use of subsampling provides good opportunity for decreasing the amount of digital processing, hardware components and followed by capital expenditure consumed during fabrication of sonars systems. lt also allows increasing the spatial resolution of sonar by increasing the number of preformed beams in the sonar array.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2001
• Tom: Vol. 4
• Strony: 201--204
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Poćwiardowski P.

• Technical University of Gdańsk, Remote Monitoring Systems DepartmentNarutowicza 11/12, 80-952 Gdańsk, Poland

autor

Kobylarz P.

• Technical University of Gdańsk, Remote Monitoring Systems DepartmentNarutowicza 11/12, 80-952 Gdańsk, Poland

Bibliografia

• 1. E. Hermanowicz, Specjalne filtry o skończonej odpowiedzi impulsowej i ich zastosowanie do modulacji i demodulacji kwadraturowej, ELEKTRONIKA Nr. 82, Zeszyty naukowe Politechniki Gdanskiej
• 2. A. Eliminowicz, Komputerowe modelowanie wąskopasmowego beamformera FFT, Prace XV Sympozjum z Hydroakustyki, Gdańsk-Jurata 26-29 Maja 1998,.
• 3. Knight et al., Digital Signal processing for sonar, Proceedings of the IEEE, Vol. 69, No. 11, Nov. 1981,
• 4. I. Selin, Detection Theory, Princeton, 1965 5. A. S. Willsky, Relationships between digital signal processing and control and estimation theory, Proc. IEEE, vol. 66, Sept 1978