Intra-Symbol Multi-Dimensional Modulation for Noise Reduction
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Solution Overview
Problem
Existing modulation techniques suffer from significant noise and byproducts, limiting data transmission rates and requiring excessive bandwidth, while struggling to maintain high signal quality and reliability.
Innovation Solution
The implementation of Phase/Amplitude-Time modulation, which combines amplitude-time and variable phase modulation of sine waves to create a compound signal wave, allowing for increased data transmission rates and improved noise immunity by reducing noise and bandwidth requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional amplitude modulation or frequency modulation is used, then data transmission can be achieved, but significant noise and modulation byproducts are generated that limit transmission rates and require excessive bandwidth
Solution Approach 1:
The modulation process is segmented into multiple dimensions: amplitude-time modulation for one data stream and phase modulation for another data stream. This segmentation allows each dimension to carry independent information while minimizing interference and noise generation from traditional single-dimension modulation
Solution Approach 2:
The patent transitions from traditional single-dimension modulation to multi-dimensional modulation by combining amplitude-time modulation with phase modulation. This dimensional expansion enables simultaneous transmission of multiple data streams with reduced noise and improved spectral efficiency
2Productivity
If hybrid modulation schemes like QAM are used to improve data transmission rates, then bandwidth efficiency improves, but significant noise and modulation byproducts still reduce actual transmission rates
Solution Approach 1:
The data transmission is segmented across multiple modulation dimensions: amplitude-time modulation handles one portion of data while phase modulation handles another portion. This segmentation avoids the noise-generating interactions present in traditional hybrid schemes like QAM
Solution Approach 2:
The patent introduces an intermediary approach by using amplitude-time modulation as a base layer that generates minimal noise, then adding phase modulation as a secondary layer. This layered intermediary structure reduces overall noise generation compared to direct high-order QAM schemes
3Productivity
If more bits per cycle are transmitted to increase data rates, then transmission efficiency improves, but noise and modulation byproducts increase reducing signal quality
Solution Approach 1:
The patent achieves high bits-per-cycle transmission by adding phase modulation as an additional dimension to amplitude-time modulation. This dimensional addition allows multiple bits to be encoded simultaneously without proportionally increasing noise, maintaining signal-to-noise ratio while improving throughput
Data Source
AI summary
In accordance with at least one embodiment, a method, apparatus, and communication system provide intra-symbol multi-dimensional modulation (ISMM). A modulator can be provided modulate data according to ISMM for transmission. The modulator can include a dimensional mapper configured to receive transmit data to provide a plurality of outputs for a plurality of different dimensions; a plurality of dimensional modulators coupled to the dimension mapper, the plurality of dimensional modulators configured to receive the plurality of outputs and to provide a plurality of modulated outputs for the plurality of different dimensions, the plurality of dimensional modulators configured to convey data distributed among a plurality of discrete locations within a symbol; a combiner configured coupled to the plurality of dimensional modulators, the combiner configured to receive the plurality of modulated outputs, to combine the plurality of plurality of modulated outputs, and to provide a transmit signal; and a transmit filter.