Ship Positioning Estimation Using Phased Array Antenna in FMCW Radar System for Small-Sized Ships

Abstract

Conventionally, a pulse radar is used for middle-sized or large-sized ships to detect other ships or obstacles located at a long distance. However, it is hardly equipped for most of the small-sized ships due to mounting and maintenance costs. Therefore, FMCW(frequency modulated continuous wave) radar is suggested as an alternative for the small-sized ships. Since it operates with low power and has good range resolution for relatively close objects, it is eligible for the small-sized ships. In previously proposed FMCW radar system, it only estimates distance and velocity of a target ship placed in the direction of main beam and is hard to detect several ships simultaneously. Thus, we suggest the method for detecting several ships at the same time by applying MUSIC(multiple signal classification) algorithm to FMCW radar signal received by a phased array antenna. In addition, by combining digital beam forming with the MUSIC algorithm, better angle resolution is achievable.

Wideband Chirp Waveform Generation and Error Compensation Using Multi-DDS

“…또 다른 신호적 특성 으로 송수신 하는 파형의 모양이 해상도나 대역폭을 결정한다. 연속 신호인 주파수 변조 연속 파형은 비교 적 근거리의 대상을 관측할 때 사용되며 [4] , 무인기나…”