Carrier Wave Modulation Without Sidebands for Minimal Bandwidth
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Solution Overview
Problem
Current modulation processes require finite bandwidth proportional to the highest signal frequency, resulting in limited available frequencies for radio frequency communication, leading to inefficient use of spectrum and regulatory constraints.
Innovation Solution
The method generates modulated sinusoidal carrier waves with zero sidebands by configuring each cycle to start and end at zero voltage crossing points, allowing only the carrier frequency to carry information, thus eliminating the need for sidebands and reducing bandwidth requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional modulation processes are used to transmit information, then information can be carried in sidebands, but bandwidth consumption increases proportionally to the highest signal frequency
Solution Approach 1:
The invention extracts and eliminates the sidebands from the modulated carrier wave, keeping only the carrier frequency. The modulating signal is embedded directly into the carrier wave by varying its parameters (amplitude, frequency, or phase) without generating sideband components, thus removing the bandwidth-consuming elements while preserving information transmission capability
Solution Approach 2:
The invention changes the fundamental approach by varying the parameters of the carrier wave itself (amplitude, frequency, or phase) to encode the modulating signal, rather than generating sidebands. This parameter modulation allows information to be carried in the carrier's instantaneous properties, eliminating the need for sidebands and reducing bandwidth requirements to near zero
2Length of stationary object
If sidebands are suppressed to conserve transmission bandwidth, then bandwidth efficiency improves, but the complexity of modulation and demodulation processes increases
Solution Approach 1:
The invention creates a universal modulation framework where a single carrier frequency performs multiple functions: it carries the information through parameter variations and serves as the sole transmission component. This eliminates the need for separate sideband components and simplifies both modulation and demodulation by focusing all functionality on the carrier wave itself
Solution Approach 2:
Instead of modulating the carrier to generate sidebands and then suppressing them, the invention inverts the approach by directly modulating the carrier's parameters to embed information without generating sidebands in the first place. This reverses the conventional wisdom that information must be carried in sidebands, achieving bandwidth efficiency without complex suppression circuits
3Productivity
If higher carrier bandwidth is used to accommodate more frequencies, then more information can be transmitted, but the available spectrum for radio frequency communication decreases
Solution Approach 1:
The invention merges the modulating signal directly with the carrier wave by varying the carrier's parameters, combining both signals into a single frequency component. This eliminates the need for separate sideband frequencies, allowing high information transmission rates to be achieved within a minimal bandwidth, thus preserving the available spectrum for more communication channels
Data Source
AI summary
A method for transmission of signal is provided, the method comprising the steps of receiving one or more modulating signals, generating one or more modulated sinusoidal carrier waves with zero side bands, including one or more sine wave cycles at carrier frequency that have a predetermined one or more properties, defined for complete cycle at the beginning of each sine cycle at one or more zero voltage crossing points in accordance with the one or more values of the one or more modulating signals. The one or more predetermined properties to change, is selected from group of amplitude, frequency, phase, time period and combinations thereof.