HDDM Hardware Evaluation for Robust Interference Mitigation

Area of Science:

• Electrical Engineering
• Signal Processing
• Navigation Systems

Background:

• Global Navigation Satellite System (GNSS) receivers are susceptible to performance degradation caused by signal interference.
• Existing interference mitigation techniques often lack robustness and multi-purpose applicability for diverse interference scenarios.
• Reliable GNSS operation necessitates advanced methods to counteract various forms of signal disruption.

Purpose of the Study:

• To describe state-of-the-art interference mitigation techniques for GNSS receivers.
• To propose and present a hardware implementation of the High-rate DFT-based Data Manipulator (HDDM) algorithm as a solution to current limitations.
• To evaluate the performance, resource utilization, and power consumption of the HDDM hardware module in different receiver configurations.

Main Methods:

• A hardware module of the HDDM algorithm was implemented.
• The HDDM module was integrated into three distinct GNSS receivers with varying analog radio-frequency (RF) front-end dynamic ranges.
• Performance was evaluated by comparing the HDDM-equipped receivers against low-end and high-end commercial receivers using diverse interference types, including frequency hopping and pulsed interference.

Main Results:

• The hardware HDDM implementation achieved performance comparable or superior to existing state-of-the-art mitigation techniques.
• The HDDM demonstrated enhanced effectiveness against more complex interference types, such as frequency hopping and pulsed signals.
• Resource utilization and power consumption were evaluated across different receiver integrations, providing insights into hardware efficiency.

Conclusions:

• The HDDM algorithm, particularly in its hardware implementation, offers a robust and effective solution for GNSS interference mitigation.
• The HDDM shows significant advantages over conventional methods when dealing with challenging and complex interference environments.
• The proposed hardware module provides a viable path towards improving the reliability and performance of GNSS receivers in adverse signal conditions.