Performance Analysis of Integrated Wireless Sensor and Multibeam Satellite Networks Under Terrestrial Interference

Area of Science:

• Satellite Communications
• Wireless Sensor Networks
• Signal Processing

Background:

• Integrated Wireless Sensor and Multibeam Satellite Networks (IWSMSNs) face performance degradation due to terrestrial interference.
• Terrestrial interference can originate from terrestrial communication networks (TCNs) or signals from satellite sinks (SSs).

Purpose of the Study:

• To investigate the performance of IWSMSNs under terrestrial interference.
• To develop and analyze hybrid one-dimensional (1D) and 2D beam models considering intra-beam (β) and inter-beam (α) interference factors.

Main Methods:

• Derivation of closed-form approximations for capacity per beam using Haar approximations for the return link.
• Modeling IWSMSNs under Rician fading channels.
• Comparison of optimal joint decoding capacity with linear minimum mean square error (MMSE) capacity.

Main Results:

• Optimal joint decoding capacity is substantially higher than MMSE capacity under identical conditions.
• Rician fading degrades network capacity, with performance converging as the Rician factor increases.
• Interference factors (α, β) and the number of SSs significantly influence both optimal and MMSE capacities.

Conclusions:

• The proposed hybrid beam models provide valuable insights into IWSMSN performance under terrestrial interference.
• Understanding the impact of interference and fading is crucial for optimizing IWSMSN design.
• Joint decoding offers a superior capacity bound compared to singular decoding methods in IWSMSNs.