This paper aims to introduce a case of improving the performance of aged naval ships' Identification Friend or Foe(IFF) equipment from Mode 4 to Mode 5, thereby enhancing operational capabilities and overcoming integration limitations. Since 2019, South Korea has been conducting a project to replace IFF equipment across the entire military, categorized into naval ship, air force aircraft, surveillance and reconnaissance, and protection. Among these, three naval classes without combat systems required not only an upgrade of their IFF equipment from Mode 4 to Mode 5 but also an integration capability that would allow them to maintain the same fire control procedures by linking with existing naval gun fire control systems. To implement this integration function, the signal processing methods of the existing IFF equipment were analyzed, and based on this, the integration function was implemented in a signal converter module. This paper is expected to serve as an important resource for future performance upgrades of internal equipment in aged naval ships.

Abstract
1. 서 론
2. 본 론
    2.1 피아식별 개요
    2.2 피아식별장비 성능개량
3. 결 론
References

• 정성빈(Defence Agency for Technology and Quality) | Sung-Bin Jung Corresponding author
• 이상민(Defence Agency for Technology and Quality) | Sang-Min Lee
• 오준희(Hanwha Systems) | Jun-Hee Oh
• 박성순(Hanwha Systems) | Seong-Sun Park