GNSS Clean Signal Distribution & Coverage Solution

Demand Background

GNSS systems fail not because of accuracy, but because of signal integrity and availability.

• No GNSS signal in indoor environments
  Testing, validation, and system integration cannot be performed due to signal blockage
• Severe signal degradation under interference
  Weak GNSS signals are easily suppressed, leading to unstable or lost positioning
• Unreliable test conditions
  Different devices operate under inconsistent signal environments, making results non-repeatable
• Lack of trusted GNSS signal source
  Systems cannot distinguish between clean and corrupted signals

👉 Core issue:
GNSS signals are unavailable, unstable, and untrusted in real-world and test environments

Product Solution

This solution uses dual AJT105S + GNDA4 to generate, process, and distribute clean GNSS signals for controlled and reliable operation.

Step 1: Clean GNSS Signal Generation (AJT105S ×2)

• Each AJT105S receives live GNSS signals and performs:
  • Anti-jamming (≥105 dB interference suppression)
  • Anti-spoofing (sync / async / relay protection)
• Outputs clean and trusted GNSS RF signals via RF interface

👉 Result:
Corrupted signals are filtered, only verified GNSS signals are passed forward

Step 2: Signal Amplification & Distribution (GNDA4)

• Receives clean GNSS RF signals from AJT105S
• Performs:
  • Signal amplification (adjustable gain up to 40–60 dB)
  • Low-noise conditioning (~3 dB NF)
  • Multi-channel distribution (4 independent RF outputs)

👉 Result:
Stable, amplified GNSS signals delivered to multiple endpoints

Step 3: Signal Coverage & Multi-Terminal Use

GNDA4 outputs can be used in two ways:

• GNSS signal coverage via antennas
  → Indoor / facility / tunnel GNSS signal extension
• Direct RF output to terminals
  → GNSS receivers, UAV systems, navigation units

👉 Result:
Controlled GNSS environment for testing and deployment

Typical Application Scenarios

1. Indoor GNSS Testing (Core Scenario)

• UAV and navigation system testing in lab environments
• Repeatable, controlled GNSS signal conditions
• Multi-device synchronized validation

2. Interference Environment Compensation

• Maintain GNSS availability in jammed or degraded environments
• Provide clean and stable signal source for critical systems

Solution Value

Create a controlled, clean, and reliable GNSS signal environment

• Ensure signal integrity
  Only clean, anti-jammed, anti-spoofed GNSS signals are used
• Enable indoor and controlled testing
  GNSS becomes usable in environments where it normally fails
• Support multi-system operation
  One signal source drives multiple devices consistently
• Improve reliability in interference conditions
  Maintain navigation capability under real-world threats

Deliver clean GNSS signals where they are needed, when they are needed, without compromise