overmodulation


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overmodulation

[¦ō·vər‚mäj·ə′lā·shən]
(communications)
Amplitude modulation greater than 100%, causing distortion because the carrier voltage is reduced to zero during portions of each cycle.
References in periodicals archive ?
Space vector pulse width modulation of three-level inverter extending operation into overmodulation region," IEEE Transactions on Power Electronics, 18(2): 604-611.
Khambadkone, "A simple space vector PWM scheme to operate a three-level NPC inverter at high modulation index including overmodulation region, with neutral point balancing," IEEE Transactions on Industry Applications, vol.
Another problem that arises frequently when you're mixing audio for live events is overmodulation (or overmod) on the mixer input.
Goodman (39) noted that dissociative symptoms in PTSD may be a distinct aspect of the disorder but also a part of maladaptive posttraumatic process certain with emotional overmodulation mediated by midline prefrontal inhibition of limbic regions.
The topics include the overmodulation of three-phase voltage inverters, stochastic modulation strategies, PWM strategies for multi-level converters, and sliding mode current control for a synchronous motor.
615) and in terms of the neurobiology of the disorder there is an overmodulation of emotions by inhibition of the limbic regions related to emotions.
Carrier based PWM-VSI overmodulation strategies: Analysis, comparison, and design // IEEE Trans.
The boundary of the linear modulation and overmodulation is the hexagon.
To obtain the maximum possible fundamental voltage 2Vdc/[pi], the operation of the VSI must be extended into the overmodulation region.
Usually, in an AM most AM transmitters attempt to maintain between 90% to 95% modulation as a compromise between efficiency and the chance of drifting into overmodulation.
Combined with the wideband compander and other elements, the resulting system has a wide range of independent-gain/spectral-tilt combinations, and can therefore deal with the broadest range of signal/noise spectral combinations, without overload or overmodulation.
When people are trying to get that big FM radio sound on their tracks, they're applying something line an Orban or dbx [audio] compressor, but applying too much [audio] compression"--"brickwalling" the mix, in the jargon, using very fast attack and release parameter settings--"and what you get instead is overmodulation as a result of overall aggressive energy compression.