Zero-Sideband Carrier Modulation for Bandwidth-Limited Transmission
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Solution Overview
Problem
Current modulation processes require finite bandwidth proportional to the highest signal frequency, leading to limited available frequencies for radio frequency communication, resulting in 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 conveyed through sidebands, but bandwidth consumption increases proportionally to the highest signal frequency
Solution Approach 1:
The invention extracts and eliminates the sideband components from the modulated signal, retaining only the carrier frequency. By removing the upper and lower sidebands that traditionally carry information, the system achieves information transmission through carrier frequency modifications alone, thereby reducing bandwidth consumption to zero while maintaining information conveyance capability
Solution Approach 2:
The invention changes the modulation parameter from amplitude/phase variations that produce sidebands to frequency-based encoding at the carrier frequency itself. By modifying how information is encoded (using carrier frequency properties rather than sideband amplitudes), the system eliminates the need for bandwidth-proportional sidebands while preserving information transmission
2Area of stationary object
If sidebands are suppressed to conserve transmission bandwidth, then bandwidth efficiency improves, but information carrying capacity must be maintained through alternative means
Solution Approach 1:
The invention uses the carrier frequency itself as an intermediary to carry information that would traditionally require sidebands. By encoding information in the carrier's frequency properties (such as instantaneous frequency deviations or zero-crossing patterns) rather than in sideband amplitudes, the system maintains information carrying capacity while eliminating bandwidth-consuming sidebands
Solution Approach 2:
Instead of using sidebands to carry information and suppressing the carrier, the invention inverts the traditional approach by using the carrier frequency itself to encode information directly. This inversion allows the carrier to perform the information-carrying function that sidebands traditionally performed, achieving bandwidth efficiency without sacrificing information capacity
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.