OFDM Transceiver Gas Pipe Broadband Dispersion
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Solution Overview
Problem
Conventional broadband access technologies using gas pipes face significant signal dispersion issues due to waveguide effects, making Ultra Wideband (UWB) signals economically unviable for practical distances, as they are highly susceptible to dispersive effects in gas pipes.
Innovation Solution
Employing Orthogonal Frequency-Division Multiplexing (OFDM) or Frequency-Division Multiplexing (FDM) techniques to transmit digital data through gas pipes, which break the signal into small frequency bands, minimizing the impact of waveguide dispersion and enabling efficient broadband access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Ultra Wideband (UWB) signals are used for broadband access via gas pipes, then transmission bandwidth is increased, but signal dispersion due to waveguide effects becomes severe, making the system economically unviable
Solution Approach 1:
The patent segments the wide frequency band into multiple smaller orthogonal sub-bands for OFDM transmission. Each sub-band experiences minimal waveguide dispersion, allowing the system to achieve high overall bandwidth while maintaining signal quality. The gas pipe waveguide effects that severely impact UWB signals are effectively managed by this segmentation approach.
2Productivity
If UWB signals are transmitted through gas pipes, then broadband access is achieved, but waveguide dispersion severely limits usable bandwidth over practical distances
Solution Approach 1:
The patent divides the data stream into multiple parallel sub-streams, each modulated onto a separate orthogonal frequency sub-band. This segmentation allows high data transmission rates to be achieved while each individual sub-band suffers minimal dispersion, preventing information loss.
Solution Approach 2:
The patent changes the frequency parameter by using multiple discrete frequency sub-bands instead of a continuous wideband signal. This parameter change transforms the transmission approach from one vulnerable to waveguide dispersion (UWB) to one that is resilient (OFDM with spaced sub-carriers), maintaining high productivity while reducing information loss.
3Quantity of substance
If conventional wired technologies like cable modem or DSL are used, then broadband access is provided, but transmission bandwidth is limited compared to gas pipe waveguide potential
Solution Approach 1:
The patent makes the existing gas pipe infrastructure multi-functional by enabling it to carry both natural gas and electromagnetic communication signals simultaneously. This universality allows the system to achieve transmission bandwidth far exceeding conventional wired technologies while utilizing already-deployed infrastructure, thereby avoiding the complexity of installing new dedicated communication lines.
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
OFDM/FDM signals can be transmitted with minimal dispersion, maintaining high bandwidth and making broadband access via gas pipes economically viable by managing dispersive effects, thus providing reliable and efficient data transmission.
Implementation Method 1
The gas pipes serve as wave guides for the UWB signals
Implementation Method 2
the use of gas pipes as a waveguide causes significant dispersion in signals transmitted within the gas pipes
Data Source
AI summary
A method and system for providing broadband access to a data network via gas pipes is disclosed. Embodiments of the present invention utilize Orthogonal Frequency-Division Multiplexing (OFDM) or Frequency-Division Multiplexing (FDM) as a modulation technique in order to protect against the effects of dispersion in the gas pipes. An OFDM transceiver modulates a digital data stream into an OFDM signal, RF up-converts the OFDM signal, and transmits the RF up-converted OFDM modulated signal through a gas pipe.