Spectral/Fourier Analysis TRIZ Cases

Phase-shifted product-sum processing minimizes vibration rectification errors, improving periodic signal extraction without envelope smoothing.

Dual detector paths thin and compress FFT streams so FFT plots and spectrograms can be shown together without losing signal distribution.

Maps spurious frequencies against multiple tone frequencies to quickly reveal RF signal relationships and support source identification.

Parallel time-delay channels combine ESPRIT and a robust Chinese remainder theorem to resolve real-signal aliasing with fewer samples.

Iterative frequency-bin analysis locates blocker signals with higher resolution and lower computation, improving interference cancellation.

A modulation screen and high-sensitivity magnetometer map weak static magnetic fields with one detector, cutting array complexity and data load.

A reference configuration and minimum-phase difference let engineers measure ADC-like DUT phase response with one setup and less error.

Separates DAC and ADC harmonic distortion using calibrated path gain, phase, and FFT analysis to improve analog signal measurement accuracy.

A modulation screen and high-sensitivity magnetometer map weak or static magnetic fields with one sensor, reducing array complexity and data load.

Multiple RF acquisitions at shifted center frequencies are stitched into one wideband waveform, preserving phase while avoiding extra VSA cost.

Filter banks and multi-tone bias modulation expose time-varying audio distortion, phase shifts, and wow/flutter missed by single-tone tests.

Frequency-domain peak extraction suppresses primary-signal artifacts to detect overlapping transmissions with fewer false alarms.

Real-time shaft proximity sensing tracks runout and axial position in ESPs to cut vibration and wear in harsh SAGD conditions.

Measures time-varying harmonic, intermodulation, phase, and frequency distortion in audio equipment using dynamic bias signals and filter banks.

A composite multi-sine test signal captures voltage and current at once, cutting component frequency response measurement time.

A sinc-shaped pulse plus sinusoidal excitation captures oscillator spectral density in seconds, improving MEMS resonance and Q measurement accuracy.

A two-stage trigger stores signal segments first, then scans them offline to detect rare events across long time or frequency ranges.

Spectrum-based optimization calibrates gain mismatch and timing offset in time-interleaved ADCs to suppress image power and improve output accuracy.

Predictable non-uniform ADC sampling suppresses aliasing in wideband receivers, helping detect weak signals with lower hardware and compute load.