Digital Pulse FMOP Modeling via Inverse Fourier Transform

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Solution Overview

Problem

Conventional signal processing techniques face challenges in accurately generating digital pulses with specific Frequency Modulation on Pulse (FMOP) properties that closely match data from other platforms, as they primarily focus on the leading edge of the pulse waveform.

Innovation Solution

A system utilizing a processor, integrator, and converter to compute discrete Fourier transforms of digital pulse frequency data, integrate phase data, and apply inverse discrete Fourier transforms to produce a continuous signal that can be sampled at any predetermined time instant, enabling the creation of complex digital waveforms with desired FMOP characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional signal processing techniques measure and compare FMOP near the leading edge of a pulse waveform, then the measurement process is simple, but the accuracy of generating digital pulses with specific FMOP properties is insufficient

Engineering Contradiction:
ImproveFMOP measurement accuracyVSAvoidsignal processing system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The pulse waveform is segmented into multiple discrete samples, with particular emphasis on sampling the leading edge portion where FMOP properties are most significant. This segmentation allows for precise measurement and manipulation of FMOP characteristics while maintaining system manageability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Conventional mechanical or analog signal processing is replaced with digital signal processing techniques, including discrete Fourier transforms and inverse discrete Fourier transforms. This substitution enables more precise FMOP measurement and pulse generation while providing greater flexibility in algorithm implementation.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If an algorithm computes the sequence of digital samples required to generate a wave signature, then the ability to generate specific FMOP properties is improved, but the complexity of the processing system increases

Engineering Contradiction:
ImproveFMOP signature generation capabilityVSAvoidalgorithm complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The inverse discrete Fourier transform algorithm serves multiple functions: it generates the wave signature from computed digital samples, enables arbitrary FMOP characteristics, and provides a unified approach for different pulse types. This multi-functionality reduces the need for separate specialized algorithms.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system allows arbitrary changes to FMOP parameters including frequency, modulation depth, and pulse width. By modifying input parameters to the inverse discrete Fourier transform, different FMOP signatures can be generated without changing the fundamental algorithm structure, enhancing adaptability.

Inventive Principle:
Principle #35Parameter changes

3Measurement precision

If the system generates pulses with FMOP signatures that closely match data from other platforms, then the measurement precision is improved, but the processing time increases

Engineering Contradiction:
ImproveFMOP signature matching accuracyVSAvoidpulse generation time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system pre-computes the inverse discrete Fourier transform to generate the wave signature before actual pulse transmission is needed. This preliminary computation allows for precise FMOP matching while enabling rapid pulse generation during actual operation, as the computationally intensive transformation has already been performed.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS7848220B2System for modeling digital pulses having specific FMOP properties
Publication Date: 2010.12.07 LOCKHEED MARTIN CORP
  • US7848220B2 patent drawing
  • US7848220B2 patent drawing
  • US7848220B2 patent drawing

AI summary

A system samples data of a digital pulse. The system includes a processor, an integrator, and a converter. The processor computes a discrete Fourier transform of frequency data of the digital pulse. The discrete Fourier transform includes a first output. The integrator integrates the first output to produce phase data. The phase data includes a second output. The converter applies an inverse discrete Fourier transform to the second output to produce a continuous signal that may be sampled at a predetermined time instant.