Abstract:
PURPOSE: The FMCW (Frequency Modulated Continuous Wave) radar signal process module and a memory management method thereof can save using memory resource. CONSTITUTION: The FMCW radar signal process module comprises a first FFT (Fast Fourier Transform) processor (11), a second FFT processor (12), and a CFAR (Constant False Alarm Rate) wave detector (13). The first FFT processor is connected to a second port of a double-port-memory (100), and after FFT-processing data stored in the double-port-memory through the second port, stores first data, which is FFT-processed, into the double-port-memory. The second FFT processor is connected to a first port, and it reads a first data through the first port, and after FFT-processing the first data read, stores second data which is FFT-processed into the double-port-memory. The CFAR wave detector is connected to the second port and detects a target by CFAR-computing the second data stored in the double-port-memory. [Reference numerals] (11) First FFT processor; (12) Second FFT processor; (13) CFAR wave detector
Abstract:
PURPOSE: A method for compensating a radar video display based on a true north reference in the surveillance radar system is provided to display all radar videos regardless of the real time change of heading. CONSTITUTION: Whether the veering of a fleet is in a clockwise direction or in a counterclockwise direction is confirmed based on the heading information of a gyro. The interval of an azimuth change pulse is calculated to compensate for the variation amount of heading. The azimuth change pulse is generated according to the calculated interval of the azimuth change pulse.
Abstract:
An apparatus and a method for canceling an adaptive interference signal are provided to obtain an optimum erroneous alarm rate by adaptively changing an erroneous alarm rate of a CA-CFAR(Call Averaging-Constant False Alarm Rate) detector. A frequency domain conversion unit(202) receives an auxiliary channel output signal for canceling an interference signal included in a main channel output signal, and converts it into a frequency domain. A weight value calculating unit performs calculation by multiplying a certain weight value to the frequency domain-converted signal. An adaptive signal processing unit(401) discriminates whether there is an interference signal in each frequency band, and selectively updates only a frequency band signal in which there exists an interference signal through the weight value calculating unit.
Abstract:
PURPOSE: A phase acquiring method of an active phased array antenna radiation element is provided to effectively execute rear side phase array of an active phased array antenna having various channels. CONSTITUTION: Near field measurement result data of a channel is stored and it is changed into S-parameter(S501). An entire signal which is sampled is minimized to a signal which is need for calculation by an algorithm and Fourier transformation is executed(S502). Far field pattern calculation and back-projection calculation are executed as the number of cassettes(S503). Phase at the arrangement surface in regard to all radiation elements is obtained(S504).