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Fusion of Data Received from AIS and FMCW and Pulse Radar - Results of Performance Tests Conducted Using Hydrographical Vessels “Tukana” and “Zodiak”

Krol A., Stupak T., Wawruch R., Kwiatkowski M., Paprocki P., Popik J.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2011

Vol. 5, no. 4

463--469

Paper presents results of performance tests of the Integrated Vessel Traffic Control System re-alizing fusion of data received from shore based station of the Automatic Identification System (AIS) and pulse and Frequency Modulated Continuous Wave (FMCW) radars and presenting information on Electronic Navigational Chart issued by the Polish National Hydrographical Service – Hydrographical Office of the Polish Navy. Tests were conducted in real sea conditions using hydrographical vessels “Tucana” and “Zodi-ak” owned by the Maritime Office in Gdynia.

A Novel Approach to Signal Processing in FMCW Radar

Wojtkiewicz A., Nałęcz M., Kulpa K., Rytel-Andrianik R.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2002

Vol. 50, Nr 4

347--359

New possibilities of Digital Signal Processing (DSP) in Frequency Modulated Continuous Wave (FMCW) radar are presented. By the use of a transformation belonging to the class of higher-order bilinear time-frequency transforms (such as Polynomial Phase Transform PPT, Generalized Ambiguity Function GAF or Generalized Wigner-Ville Distribution GWVD) one can estimate coefficients of polynomial phase of the intermediate frequency (IF) signal. Two practical cases with non-negligible higher order coefficients are considered: compensation of nonlinear modulator and estimation of moving target acceleration, velocity and range. In the latter case, target velocity introduces to the processed signal a linear phase shift that can be measured using Fourier transform. Similarly, target acceleration introduces parabolic shift to the signal phase, which in turn enables the estimation of the acceleration. The article includes the description of a relationship between quadratic coefficient and object acceleration as well as estimation methods for this coefficient. Examples based on recorded signals from working FMCW radar prove usefulness of proposed methods.