Multi-Component Signal Mixing for Spectral-Efficient Data Transmission
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Solution Overview
Problem
Existing modulation techniques such as QAM and QPSK are limited by spectral inefficiency, requiring large spectral resources for high data rates, which strains wireless and telecommunications systems and limits data transmission capacity.
Innovation Solution
A method and apparatus for generating a multi-component signal comprising a modulated signal and an auxiliary zero-crossing modulated waveform, where the auxiliary waveform is embedded within the modulated signal, allowing for efficient data transmission without significant signal degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If QAM and QPSK modulation techniques are used to improve data transmission rates, then data transmission capacity is improved, but spectral efficiency deteriorates requiring large spectral resources
Solution Approach 1:
The patent combines a conventional modulated signal with an auxiliary zero-crossing modulated waveform to create a composite signal. This merging allows the system to achieve high data transmission capacity while improving spectral efficiency, as the auxiliary waveform fills spectral gaps and the combined signal maintains better power spectral density characteristics without requiring excessive bandwidth.
Solution Approach 2:
The invention creates a composite signal by superimposing a zero-crossing modulated waveform onto a conventional modulated signal. This composite structure leverages the advantages of both waveform types: the conventional modulation provides robustness and compatibility while the zero-crossing modulation contributes to spectral efficiency and compact bandwidth utilization.
2Area of stationary object
If bandwidth compression techniques are used to reduce occupied bandwidth, then spectral efficiency is improved, but signal distortion and information loss occur
Solution Approach 1:
The auxiliary zero-crossing modulated waveform acts as an intermediary that bridges the gap between bandwidth compression and signal quality preservation. By inserting this intermediate waveform between the conventional modulated signal and the final transmitted signal, the system achieves bandwidth reduction while the auxiliary waveform compensates for potential distortions and maintains information integrity.
3Area of stationary object
If signal shaping techniques are used to modify waveform to reduce spectral bandwidth, then required bandwidth is reduced, but complexity and computational intensity increase
Solution Approach 1:
The patent segments the signal processing into distinct components: a conventional modulated signal and a separate auxiliary zero-crossing modulated waveform. This segmentation allows each component to be processed independently using simpler algorithms, reducing overall computational complexity while still achieving bandwidth reduction through the combination of these segmented parts.
Data Source
AI summary
A system and method for generating a multi-component signal including a modulated signal and an auxiliary signal by embedding the auxiliary signal within the modulated signal. The method includes receiving input digital data and generating, based upon the input digital data, zero-crossing modulated waveform data encoding the input digital data. The zero-crossing modulated waveform data represents an auxiliary zero-crossing modulated waveform having a plurality of periods wherein portions of the plurality of periods are shifted in phase relative to a sinusoid. The method further includes mixing the zero-crossing modulated waveform data and modulation data representing a modulated signal wherein the mixing produces a multi-component signal. The modulated signal may consist of a frequency modulated signal, an amplitude modulated signal, or other conventionally modulated signal.