Pasif radar hedef tespit performansinin iyileştirilmesi için çoklu ortak FM radyo vericilerin kullanılmasının araştırılması

Yıl 2019, Cilt: 25 Sayı: 5, 525 - 531, 21.10.2019

Burak Tüysüz

Öz

Gizli
operasyon kabiliyeti, uygun maliyet ve düşük bakım gereksinimi gibi özellikleri
nedeniyle pasif radar sistemlerine olan ilgi giderek artmaktadır. Bu
sistemlerin en büyük avantajı ise kendilerine ait bir vericiye ihtiyaç duymadan
ortamda bulunan vericileri kullanarak hedef tespit ve takibi yapabilmeleridir.
Son yıllarda sayıları artan kablosuz iletişim vericilerinin tek bir noktada
toplanmaya başlanması ise pasif radar sistemleri için yeni fırsatlar
yaratmaktadır. Bu çalışmada, ortak bir verici noktasından, birden çok frekansta
yapılan FM radyo yayınların birlikte kullanılmasıyla pasif radar sistemlerinde
hedef tespit performansının arttırılması araştırılmıştır. Önerilen yöntem
sayısallaştırılan geniş bir frekans bandından ayrıştırılan tekil kanalların
yazılım tabanlı radyo teknolojileri ile toplanarak hedef tespit performansının
artırılmasını sağlamaktadır. Gerçek FM radyo verileri ile yapılan testlerde
önerilen yöntemin sisteme ek yük getirmeden hedef tespit performansını
artırdığı, modülasyon içeriği sebebiyle pasif radar sistemlerinde oluşan
performans dalgalanmalarını ve oluşan hayalet hedefleri azalttığı görülmüştür.

Anahtar Kelimeler

Pasif radar, FM radyo, Çoklu verici, Hedef tespit, Yazılım tabanlı radyo

Investigation of passive radar target detection performance improvement by using multiple co-located FM radio transmitters

Öz

Interest in passive radar systems is increasing
because of its hidden operational capabilities, cost effectiveness and low
maintenance requirements. The greatest advantage of these systems is that they
can detect and follow targets using the illuminators in the environment without
the need for a dedicated transmitter. In recent years, the increasing number of
wireless transmitters have begun to be gathered at a single point, creating new
opportunities for passive radar systems. In this study, target detection
performance in passive radar systems by using multiple frequency FM radio
broadcasts from a common transmitter point is investigated. Accordingly, a
real-time applicable method proposed that combines the singular channels on a
broad frequency band with software based radio technologies to improve target
detection performance. It has been shown that the proposed method improves the
target detection performance of FM signals without introducing additional load
to the system and reduces the performance fluctuations and ghost targets that
are generated in passive radar systems due to the modulation content.

Anahtar Kelimeler

Passive radar, FM radio, Multiple transmitter, Target detection, Software defined radio

Kaynakça

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