NC-OFDM Satellite Communication Based on Compressed Spectrum Sensing

Area of Science:

• Satellite Communications
• Wireless Communication Systems
• Signal Processing

Background:

• The rapid expansion of Low Earth Orbit (LEO) constellations necessitates improved spectrum utilization in satellite communications.
• Current spectrum management techniques face challenges in efficiently accommodating the growing demands of satellite networks.

Purpose of the Study:

• To enhance spectrum utilization efficiency in satellite communications.
• To propose and evaluate a novel Non-Continuous Orthogonal Frequency Division Multiplexing (NC-OFDM) method.

Main Methods:

• Development of NC-OFDM system models for satellite communication.
• Implementation of a sub-carrier allocation method using spectrum sensing to identify and exploit spectrum holes.
• Application of a hybrid genetic particle swarm optimization algorithm for effective channel resource allocation.

Main Results:

• The proposed spectrum sensing and sub-carrier allocation method efficiently identifies available spectrum holes.
• The hybrid optimization algorithm effectively allocates channel resources within the NC-OFDM framework.
• Simulation results demonstrate a significant improvement in spectrum efficiency compared to existing methods.

Conclusions:

• The NC-OFDM method, combined with intelligent resource allocation, offers a viable solution for increasing spectrum efficiency in satellite communications.
• This approach is crucial for supporting the scalability and performance of future LEO satellite constellations.