UWB Modulation Apparatus Time-Amplitude Encoding
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Solution Overview
Problem
The on-off keying modulation scheme in UWB technology has a low data rate, resulting in inefficient data transmission.
Innovation Solution
A modulation method that forms a time difference between a data impulse and a sync impulse, modulates the amplitude of the sync impulse, and modulates the amplitude of the data impulse, combined with a demodulation method that down-converts RF signals to baseband and demodulates the time difference and amplitude of envelope signals using higher sampling rates and bit resolutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If on-off keying modulation scheme is used in UWB technology, then the implementation is simple, but the data rate is low
Solution Approach 1:
The data stream is segmented into multiple parallel data streams that are processed independently through different modulation paths (in-phase and quadrature components), allowing simultaneous transmission of multiple bits per symbol period and thereby increasing the overall data rate
Solution Approach 2:
The modulation scheme transitions from one-dimensional amplitude modulation (on-off keying) to two-dimensional modulation by introducing both in-phase and quadrature components, enabling transmission of multiple bits per symbol through combined amplitude and phase information
2Productivity
If multiple modulation parameters are used to increase data rate, then the data transmission efficiency improves, but the device complexity increases
Solution Approach 1:
The modulation apparatus is designed with multi-functional components that can handle multiple modulation parameters (amplitude and phase) simultaneously through a unified signal processing architecture, reducing overall system complexity despite the increased modulation capability
Solution Approach 2:
The in-phase and quadrature modulation paths are merged into a single composite signal transmission channel, allowing multiple data streams to be combined and transmitted simultaneously over the same UWB channel, improving efficiency without proportionally increasing hardware complexity
Data Source
AI summary
Disclosed is a modulation method for modulating n-bit data (n=p+q+r). The modulation method includes forming a time difference between a data impulse and a sync impulse to correspond to p-bit data, modulating the amplitude of the sync impulse to correspond to q-bit data and modulating the amplitude of the data impulse to correspond to r-bit data, and combining the sync impulse and the data impulse. As an example, n may be equal to p+q+r.