Abstract:
The present specification relates to an apparatus for sensing a concealed object and a method thereof, which sense a signal reflected from the concealed object by transmitting an FMCW signal, and display sensing result by sensing a portable concealed object or an object concealed in a human body located at a long or close distance and analyzing the sensed signal. In order to achieve the objective, the apparatus for sensing a concealed object according to the present specification includes: a pulse generator generating a linear frequency modulation (LFM) signal including pre-established bandwidth; a transmitter amplifying the generated LFM signal; and a transmission antenna transmitting the amplified LFM signal to a random object to be measured. The apparatus further includes: a receiving antenna receiving a signal reflected from the object to be measured; a receiver outputting a first bit frequency and a second bit frequency corresponding to a third harmonic and a second harmonic of the received signal respectively on the ground of the generated LFM signal and the received signal received through the receiving antenna; and a signal processor which calculates the distance to the object to be measured corresponding to the first bit frequency and the second bit frequency, calculates received power level of the received signal corresponding to the first bit frequency and the second bit frequency on the ground of each calculated distance, and distinguishes the kind of the object to be measured on the ground of the received power level of each calculated received signal. [Reference numerals] (100) Pulse generator; (200) Transmitter; (300) Transmission antenna; (400) Receiving antenna; (500) Receiver; (600) Signal processor; (700) Display unit
Abstract:
본 발명은, 모노스태틱 방식으로 전파를 송수신하는 레이더의 영상 처리 방법에 있어서, 전파를 수신하여 데이터를 획득하는 단계, 상기 획득한 데이터에 대하여 디처핑 프로세스(Dechirping Process)를 수행하여, 디처핑된(Dechirped) 데이터를 획득하는 단계, 상기 디처핑된(Dechirped) 데이터의 방위각 시간 영역을 방위각 주파수 영역으로 변환시키는 제 1 변환 단계, 상기 변환에 근거하여 주파수 스캐일링 함수를 획득하는 단계, 상기 주파수 스캐일링 함수에 근거하여, 상기 변환된 데이터에 대하여 Bulk RCMC(Range Cell Migration Correction)를 수행하는 단계를 포함하는 것을 특징으로 한다.
Abstract:
A radar is provided to obtain an accurate speed of an object to be monitored by removing a clutter from a reflected signal and suppressing and power leakage of the radar. A radar includes a transmitter-side frequency processor(100), a transmission antenna(200), a reception antenna(300), a receiver-side frequency processor(400), a signal processor(500), and a band reject filter(460). The transmitter-side frequency processor generates and outputs a high frequency monitoring signal. The transmission antenna transmits the monitoring signal. The reception antenna receives a reflected signal, which is Doppler-shifted by an object, from the monitoring signal. The receiver-side frequency processor receives the reflected signal and down-shifts the reflected signal, such that a Doppler frequency is obtained. The signal processor processes the Doppler frequency and obtains an object speed. The band reject filter is arranged in the frequency processor and removes a clutter and a transmission leakage power from the reflected signal.
Abstract:
A radar apparatus and a method for compensating an azimuth are provided to calculate the correct azimuth by compensating the azimuth based on a reflection signal by using an offset between channels. A radar apparatus for compensating azimuth includes a transmitting terminal intermediate frequency processing unit(100), a transmitting unit(200), a reference signal generation unit(300), a receiving unit(400), a receiving terminal intermediate frequency processing unit(500) and a signal processing unit(600). The transmitting terminal intermediate frequency processing unit(100) modulates a detection signal to a detection signal of a high frequency band. The transmitting unit(200) amplifies and transmits the detection signal of the high frequency band. The reference signal generation unit(300) modulates the detection signal to the high frequency band, and generates a reference signal by processing a Doppler effect treatment. The receiving unit(400) receives a reflection signal which is Doppler effect treated by a detector, and mixes the received signal with the reference signal of the reference signal generation unit(300). The receiving terminal intermediate frequency processing unit(500) receives the mixed signal from the receiving unit(400), and modulates the received signal to a base band. The signal processing unit(600) converts the mixed signal into a digital signal if receiving the mixed signal from the receiving terminal intermediate frequency processing unit(500). The signal processing unit(600) calculates an offset between channels through the reference signal, and compensates the azimuth by using the offset.
Abstract:
The present invention relates to an array antenna compensation apparatus in a radar system and a method thereof capable of accurately compensating power level and phase of the array antenna in the radar system. The array antenna compensation apparatus in the radar system according to an embodiment of the present invention comprises the steps of outputting a signal via a coupling line of the array antenna and compensating the array antenna as a result of a difference value between the signal and initial compensation data. [Reference numerals] (11) Transmitter; (12) Pulse generator; (13) Transmitting array antenna; (14) Receiving array antenna; (15) Receiver; (16) Signal processor; (17) Compensation data storage apparatus
Abstract:
The present invention relates to a three-dimensional battle analyzing device capable of analyzing and providing three-dimensional battle information and a method for the same. The three-dimensional battle analyzing device in accordance with the embodiment of the present invention generates coordinates of a battle position. The present invention generates the three-dimensional battle information on a treating object and a missile using an RF sensor, an IR sensor, a calculation computer, and a camera. The present invention can analyze a battle result (for example, the battle result between the treating object and the missile) based on the three-dimensional battle information and the coordinates of the battle position. [Reference numerals] (11) Coordinate generating unit; (12,15) Detection imaging unit; (13) Battle imaging unit; (14) Battle calculation unit; (AA) Battle position coordinate; (BB) Imaging data; (CC) Battle analysis; (DD) Imaging data; (EE) Calculation data; (FF) Flight trajectory and flight speed information; (GG) Proximate target detection, response system RF, and IR sensor
Abstract:
The present invention relates to a compensation apparatus of an array antenna in a radar system and a method thereof capable of performing compensation of the array antenna in the radar system installed at an arbitrary location, and preventing a transmitting and receiving beam to be distorted. The compensation method of the array antenna therein according to an embodiment of the present invention comprises the steps of: transmitting a transmission signal from a transmission array antenna; receiving the transmission signal as four reference reception antennas among a received array antenna; and compensating the transmission array antenna as a result of a difference value of an initial compensation data and the transmission signal which are received as four reference reception antennas.
Abstract:
PURPOSE: A transmitting apparatus for minimizing thermal noise interference between ground vehicle radar systems and ground vehicle radar system including the transmitting apparatus are provided to improve the Constant False Alarm Rate of a receiver by reducing thermal noise between vehicle radar systems. CONSTITUTION: An amplifier(301) amplifies an input signal. A mixer(310) mixes the inputted signal with an intermediate frequency] signal and output a shifted-up frequency. The amplifier forms an input terminal of a transmission device to reduce the noise ratio of the transmission device.