Satellite Signal Installation Merging Bidirectional Links
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Solution Overview
Problem
Current satellite television systems lack an efficient, cost-effective, and adaptable solution for bidirectional communication, particularly for machine-to-machine applications, as existing systems are cumbersome, costly, and not suited for transmitting smaller messages like voting or command messages.
Innovation Solution
An installation for the emission/reception of hyperfrequency radioelectrical satellite signals using a reflector, a low noise block LNB down converter, an emitter, and a box with modulator and demodulator, allowing for efficient signal transformation and transmission between Ku or Ka bands and S or C bands, utilizing a coaxial cable and wireless connections, which is adaptable to existing installations and reduces the need for additional equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bidirectional satellite service is implemented using traditional systems (e.g., Tooway, EP 0 888 690), then return link capability is achieved, but device complexity and installation cost increase significantly due to requiring multiple antennas, heavy supports, and additional coaxial cables
Solution Approach 1:
The patent combines the return link transmission antenna with the existing television reception antenna into a single integrated structure. The antenna serves dual purposes: receiving television signals in the 10.7-12.75 GHz band and transmitting return link signals in the 21.4-23.6 GHz band, eliminating the need for separate antennas and heavy supports
Solution Approach 2:
The antenna system is designed with multi-functionality, operating in both reception mode for television signals and transmission mode for return link communication. This universal design allows the same physical infrastructure to support both functions without requiring additional dedicated equipment
2Adaptability or versatility
If bidirectional satellite service is implemented using traditional systems, then return link capability is achieved, but installation cost increases due to requiring two reflectors or a dedicated dual-band reflector and additional infrastructure
Solution Approach 1:
The patent merges the function of two separate reflectors (one for Ku-band reception and one for return link transmission) into a single integrated reflector system. This unified structure uses one set of heavy supports and one coaxial cable infrastructure, significantly reducing material costs and installation expenses compared to traditional dual-reflector systems
3Adaptability or versatility
If ADSL or GPRS/UMTS connection is used for return link, then bidirectional communication is achieved, but equipment cost and subscription cost increase significantly
Solution Approach 1:
The system enables satellite terminals to communicate directly with each other through peer-to-peer communication facilitated by the satellite switch. Small message exchanges (voting, commands, acknowledgments) are handled autonomously between terminals without requiring terrestrial telephony infrastructure, thereby eliminating additional subscription costs and reducing equipment requirements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient, low-cost bidirectional communication suitable for machine-to-machine applications, managing tens of millions of terminals with minimal additional costs by leveraging existing infrastructure and reducing the need for powerful amplifiers, while avoiding interference between frequency bands.
Implementation Method 1
an LNB (low noise block) down converter which transforms radioelectrical signals into electrical signals in an intermediate frequency band, concentrates by the reflector, in a frequency band greater than 10 GHz
Implementation Method 2
a parabolic reflector which focuses the modulated hyprefrequency signals, on the source, designated a cornet, of an LNB
Implementation Method 3
an emitter which transforms electrical signals in an intermediate frequency band, without common frequencies with the first intermediate frequency band, into radioelectrical signals in a frequency band greater than 10 GHz
Implementation Method 4
transform into radioelectrical signals the amplified electrical signals in the second frequency band; transmit the radioelectrical signals in the second frequency band towards the reflector
Implementation Method 5
a modulator suited to modulate electrical signals in the second intermediate frequency band
Data Source
Figure 1
AI summary
The present invention concerns an emission/reception installation (1) of satellite signals comprising a reflector (3) suited to receive and emit radio signals, a unit (2) integrating an LNB (4) suited to transform radio signals into electrical signals in a first frequency band concentrated by the reflector (3), to amplify the electrical signals in the first frequency band and to lower the first frequency band towards a first intermediate frequency band. The unit (2) further comprises an emitter (TX) suited to amplify electrical signals in a second intermediate band having no common frequency with the first intermediate band, to raise the second intermediate band towards a second frequency band (S), to transform into radio signals the electrical signals in the second frequency band and to transmit these radio signals towards the reflector (3). The installation (1) further comprises a box (21) including a modulator (25) suited to modulate electrical signals in the second intermediate band, an output (32) suited to transmit electrical signals in the first intermediate band and a coaxial cable (20) connecting the unit (2) and the box (21).