FSK radar sensing in perimeter security systems

FSK Radar in Perimeter Security Systems: CIAS Technological Approach

Perimeter radar systems integrate fuzzy logic algorithms with digital signal processing to enhance detection accuracy.

The technological foundation is based on FSK radar (Frequency Shift Keying) using dual-frequency signal modulation. Unlike single-frequency Doppler systems, this method enables analysis of phase shifts in the reflected signal, delivering a three-dimensional target profile: range, speed, and direction of movement. A digital signal processor (DSP) handles incoming data using fuzzy logic algorithms, generating a multi-parameter signature for each detected object.

A critical feature is the Fuzzy SRTD technology, which implements dynamic zoning. The system generates adaptive exclusion zones near the detector, configurable with meter-level precision. This addresses a key challenge in perimeter protection: enabling operational flexibility for authorized personnel without compromising security. The algorithms perform multi-criteria object classification, identifying the target type (human, vehicle, animal) and evaluating the threat level. With exclusion zones in place, guards can move freely within authorized areas without triggering alarms, while unauthorized intrusions from other directions trigger immediate system response.

Microwave technology offers a fundamental advantage over optoelectronic systems under adverse weather conditions. Atmospheric interference such as rain, fog, or industrial dust has minimal impact on microwave propagation. Digital signal processing, combined with fuzzy logic algorithms, effectively filters out environmental noise and maintains reliable detection performance regardless of external factors.

Integration of MEMS technology provides tamper protection through accelerometric monitoring of the sensor’s physical position. The microelectromechanical sensor detects displacement, tilting, or mechanical impact on the housing, triggering a dedicated tamper alarm channel. The high sensitivity of MEMS elements enables detection of even minor vibrations, which is crucial for outdoor installations.

The system offers three detection zone configurations for outdoor deployment. The 12-meter volumetric mode (40°×90°) covers wide open areas, while the 24-meter configuration (18°×45°) is optimized for long perimeter stretches. The 12-meter curtain mode (90°×15°) forms a vertical detection plane, ideal for monitoring narrow pathways and building façades. Indoor versions with 18-meter and 36-meter ranges are also under development for interior surveillance.

Technological advancements over the previous Murena Plus model include a 30% reduction in physical size (12 cm diameter vs. 175×175×115 mm) while maintaining full functionality.

A key upgrade is the integration of a MEMS sensor for anti-movement protection and a screwless mounting bracket allowing tilt adjustment up to 75° in all directions. This simplifies installation compared to the rectangular form factor of the previous model, especially in architecturally constrained environments.

Technical specifications include an operating temperature range from -35°C to +65°C, IP65-rated housing, and 125 mA power consumption at 13.8 VDC. The system provides three solid-state relay outputs for alarm, fault, and tamper signals, along with an RS-485 digital port for network integration. Compliance with EN-50131 Grade 3 confirms its suitability for high-risk sites.

IP integration via the IP-Doorway module transforms a conventional radar detector into an enterprise-grade network device. Support for the 802.1X protocol enables port-level authentication, aligning with modern cybersecurity standards. Power over Ethernet (PoE) simplifies installation topology by combining power and data transmission over a single cable connection.

System configuration is handled through the CIAS Tuner web interface, enabling remote adjustment of detection parameters. Installers can dynamically modify detection zones, sensitivity, and classification algorithms without physical access to the hardware. This significantly reduces operational costs and ensures rapid adaptation to site configuration changes.

Real-world applications span a wide range of security scenarios. Industrial facilities can implement intelligent perimeter barriers while excluding operational zones. Logistics centers benefit from unobstructed surveillance of loading areas without hindering daily operations. Energy infrastructure sites gain reliable control over critical zones with consistent performance under all weather conditions.

Integration capabilities include support for standard security protocols via relay outputs, RS-485 digital communication, and full IP integration. This ensures compatibility with existing security systems and forms the foundation for scalable perimeter solutions. The technological platform is adaptable to a variety of architectural requirements, from standalone installations to complex enterprise-level deployments.