Satellite Channelizer Frequency Mapping for Urban Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Satellite radioterminal systems face challenges in reliably serving densely populated areas due to signal blocking by high-rise structures and poor penetration into buildings, leading to underutilization of satellite frequencies, and require enhanced capacity and economic viability.
Innovation Solution
A communications system with a space-based component that includes service link antenna elements and a channelizer for mapping spectral components of service link signals to feeder links, allowing for frequency translation and reuse, along with processing facilities for aggregating and separating feeder link signals to optimize frequency use and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite communications are used in densely populated areas, then service coverage is provided, but signal blocking by high-rise structures and poor penetration into buildings occurs
Solution Approach 1:
The patent segments the satellite service into multiple components: satellite provides broad coverage while terrestrial base stations handle localized penetration issues. The system divides frequency usage between satellite and terrestrial segments, with terrestrial infrastructure filling the penetration gaps in urban environments.
Solution Approach 2:
The patent introduces terrestrial base stations as intermediary components between the satellite and end users in densely populated areas. These terrestrial nodes act as mediators that receive signals from satellites and retransmit them locally, overcoming building penetration issues without requiring direct satellite-to-user links.
2Productivity
If satellite frequencies are reused terrestrially, then capacity is enhanced, but interference between satellite and terrestrial signals occurs
Solution Approach 1:
The patent changes frequency parameters dynamically - using different frequency sets for satellite and terrestrial segments, and adjusting which frequencies are allocated to each segment based on spatial and temporal conditions. This allows frequency reuse while managing interference through parameter optimization.
Solution Approach 2:
The system dynamically allocates frequencies between satellite and terrestrial segments based on demand and interference conditions. The frequency assignment is not static but adapts to changing traffic patterns and interference levels, allowing optimal capacity utilization while preventing harmful interference.
3Productivity
If multiple antenna patterns are deployed to increase capacity, then frequency reuse and system capacity increase, but device complexity increases
Solution Approach 1:
The patent merges satellite antenna patterns with terrestrial base station antenna patterns into a unified system. Rather than treating them as separate complex systems, the invention integrates them into a coordinated architecture where both contribute to the same service delivery, sharing control and resource management functions.
Data Source
AI summary
A space-based component (SBC) of a communications system includes a service link subsystem including a plurality of service link antenna elements configured to provide service links with radioterminals and a feeder link subsystem configured to provide respective feeder links to/from respective processing facilities. The SBC further includes a channelizer configured to map different spectral components of a signal received at the SBC via a service link antenna element to different feeder links.