UWB Pulse Generator Encoding Table Amplitude Modulation
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Solution Overview
Problem
Current ultra-wide-band generators face challenges in compatibility between frequency band occupation and pulse repetition period, requiring complex and costly bandpass filters to meet standards.
Innovation Solution
An ultra-wide-band pulse generator design that includes an addressing circuit and encoding table, using an amplitude modulator with programmable gain and optional phase modulator, to encode information elements by amplitude and phase changes, reducing the passband of pulses without the need for output bandpass filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bandpass filters are used at the output of UWB generators to meet frequency band occupation standards, then frequency band compatibility is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the filtering function from a separate physical bandpass filter component and integrates it into the pulse generation process itself. The encoding table and modulator are designed to directly generate pulses with the desired spectral characteristics, removing the need for external filtering hardware while maintaining frequency band compatibility.
Solution Approach 2:
The encoding table serves multiple functions: it performs digital encoding of information elements, controls the amplitude modulation sequence, and simultaneously shapes the pulse spectrum to meet frequency band requirements. This multi-functionality eliminates the need for separate filtering components.
2Adaptability or versatility
If bandpass filters are used at the output of UWB generators to meet frequency band occupation standards, then frequency band compatibility is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive, complex bandpass filter hardware with a software-based encoding table and digital control mechanism. The filtering function is achieved through programmed amplitude modulation sequences rather than physical filtering components, significantly reducing manufacturing cost while maintaining spectral compliance.
3Device complexity
If conventional UWB generators are designed without output bandpass filters, then device complexity is reduced, but frequency band occupation standards cannot be met
Solution Approach 1:
The patent performs spectral shaping in advance during the pulse generation process. The encoding table is pre-configured with amplitude modulation sequences that inherently produce pulses with the desired spectral characteristics, so the frequency band compatibility is built into the generation process itself rather than requiring post-generation filtering.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The generator produces pulses with reduced bandwidth, eliminating the need for costly filters and allowing for flexible configuration of pulse trains, enabling efficient digital data transmission while adhering to frequency standards.
Implementation Method 1
the modulator is an amplitude modulator assuming the form of a digital control amplifier, the gain of which is controlled by the digital words provided by the encoding table
Data Source
AI summary
An embodiment of the invention relates to a method for transmission by ultra-wide-band pulses of digital data formed with a flow of information elements, this method comprising at least one operation including sequentially encoding the information elements by modulating an oscillating signal In order to avoid the use of a bandpass filter, the oscillating signal is modulated in amplitude depending on the identity or dissimilarity of each information element relative to the preceding information element.