X-Band FMCW RADAR Signal Processing for small ship

Abstract

Conventional marine radar systems utilize pulse radar which is capable of high-power transmissions and is effective for remote detection purposes. A pulse radar is most commonly used on medium or large vessels due to its expensive installation and maintenance costs.I propose the use of a Frequency Modulated Continuous Wave (FMCW) radar system operated at low-power and high-resolution instead of the conventional pulse-radar based system. The transmitted and received signals of the FMCW radar system were theoretically analyzed and radar signal processing design and simulation experiments were performed to detect the range and speed. Intermediate Frequency (IF) signal mixed with virtual transmit and receive signals were generated to perform FMCW radar signal processing simulations where the IF signal underwent noise reduction through a lowpass filter. The maximum frequency was derived through the sample interval of the FFT size instead of using A/ D converter. This maximum frequency was used to get the frequency range and frequency speed which were in turn used to calculate the range and speed. The virtual beat frequency generated using MATLAB is utilized to analyze the beat frequency used in the actual FMCW radar system signal processing. The differences in the range and speed of the beat frequency signals are processed and analyzed.

A Performance Analysis of Phase Comparison Monopulse Algorithm for Antenna Spacing and Antenna Array

“…[1,2] 이 때, 주로 사용 되어지는 각도 추정 알고리즘에는 MUSIC 알고리즘과 Bartlett 알고리즘 등이 있는데, MUSIC 알고리즘은 도래각 추정 성능이 우수하고, 임의의 배열에도 적용할 수 있다는 장점이 있지만, 타겟이 인접해있는 상황에서의 분해능이 낮 고, 고유값 분해를 하는데에 있어서 많은 계산량을 필 요로 하기 때문에 도래각 추정을 위한 시간이 오래 걸 린다는 단점이 있다. [3] 모노 펄스 알고리즘은 기존에 사용되고 있는 알고리즘에 비해 정확도는 조금 떨어 지지만, 작은 도래각은 잘 추정해내는 장점이 있고, MUSIC 알고리즘이나 Bartlett 알고리즘에 비해 월등 히 빠른 계산 속도를 낼 수 있기 때문에, 선박용 레이 더에서 사용될 각도 추정 알고리즘으로써 연구되어질 필요가 있다.…”