CEL-FI COVERAGE ENHANCEMENT SOLUTION
Project Overview
Saudi Intelligent Solutions (SIS) successfully delivered an advanced Cel-Fi in-building mobile coverage enhancement solution for Al Jazeera Capital, a premium commercial tower located in Al Olaya district, Riyadh.
The project objective was to provide stable and reliable indoor cellular connectivity across all building areas while supporting high-quality voice and mobile data services for employees, visitors, and operational teams.
The building consists of 12 floors; all fully covered through the deployed indoor coverage solution.

Customer Challenges
The building was facing several indoor cellular coverage challenges, including:
• Weak mobile signal in internal areas
• Inconsistent voice call quality
• Poor mobile data performance
• Coverage degradation in enclosed zones
• Signal attenuation caused by building structure
• Difficulty maintaining stable multi-operator connectivity

SIS Solution
SIS designed and implemented a professional Cel-Fi indoor coverage enhancement solution using advanced RF engineering methodologies and optimized antenna distribution architecture.
The implementation included:
• Professional RF site survey and analysis
• Cel-Fi QUATRA deployment
• Indoor ceiling antenna distribution system
• Outdoor donor antenna installation
• RF optimization and balancing
• Testing, commissioning, and fine-tuning
The solution was engineered to ensure stable and reliable indoor coverage across all 12 floors while minimizing passive RF losses and improving overall signal quality.

Supported Operators
The deployed solution successfully supports:
• STC
• ZAIN
• MOBILY
Providing stable multi-operator coverage throughout the building.

Key Technical Highlights
• Advanced RF design and optimization
• Improved SINR and signal stability
• Enhanced indoor voice and data performance
• Balanced indoor antenna distribution
• Reduced weak coverage areas
• Optimized passive RF losses
• Reliable multi-floor indoor coverage

Project Outcome
Following implementation and optimization, the project achieved:
• Significant improvement in indoor cellular coverage
• Enhanced voice call stability
• Better mobile internet experience
• Improved tenant and visitor connectivity experience
• Stable multi-operator performance across all floors
• Reduced customer complaints related to mobile signal quality

Solution Components
• Cel-Fi QUATRA Units
• Indoor Ceiling Antennas
• Outdoor Donor Antennas
• RF Distribution Network
• Structured Cabling Infrastructure