5 results about "Jitter noise" patented technology

The invention relates to an SF6 gas density relay verification signal anti-jitter processing method and system, and the method comprises the steps: firstly collecting a switching value signal of a relay contact in verification in real time, and obtaining an original sequence containing jitter noise; then, a Kalman filtering algorithm is initialized, and meanwhile, a snow ablation optimizer (SAO) is configured; thirdly, constructing a fitness function containing smoothness, real-time performance and accuracy indexes, and taking minimization of the fitness function as a target to drive a snow ablation optimizer to optimize to obtain an optimal covariance matrix; the optimal parameters are injected into Kalman filtering, the state is reset, original signals are input point by point, and anti-jitter signals are output through recursive optimal estimation; and finally, judging and identifying a contact action moment through a threshold value, and recording a corresponding pressure / density value to finish verification. Compared with the prior art, the method has the advantages of being high in anti-jitter adaptability and universality, accurate in verification result, intelligent in verification process and the like.

This invention provides a time-domain correction method based on local adaptive thin-plate spline interpolation, comprising the following steps: S10, separating the pilot signal from the mixed measurement signal, performing fine phase tracking on the pilot signal, and extracting the phase noise sequence introduced by clock jitter; S20, converting the phase noise sequence into jitter at the sampling time; S30, determining the ideal sampling time, selecting several original sampling points adjacent to each ideal sampling time, obtaining a local interpolation subset, evaluating the jitter intensity of the local interpolation subset, and performing adaptive interpolation calculation accordingly to obtain the signal value at the ideal sampling time; S40, outputting the uniformly sampled signal sequence after interpolation reconstruction; this invention also provides a time-domain correction system based on local adaptive thin-plate spline interpolation. This invention solves the problems of poor real-time performance and weak adaptability of traditional TPS interpolation, achieving high-precision suppression of clock jitter noise and meeting the stringent requirements of phase measurement for space gravitational wave detection.

The present application relates to a kind of SF6 gas density relay verification signal anti-jitter processing method and system, comprising: first, the switching quantity signal of relay contact in verification is collected in real time, and the original sequence containing jitter noise is obtained;Then initialize Kalman filtering algorithm, while configuring Snow Ablation Optimizer (Snow Ablation Optimizer, SAO);Then build fitness function containing smoothness, real-time, accuracy index, with its minimization as goal drive Snow Ablation Optimizer optimization, obtain optimal covariance matrix;Optimal parameter is injected into Kalman filtering and resets state, then input original signal point by point, and output anti-jitter signal by recursive optimal estimation;Finally, through threshold value judgment identifies contact action time, records corresponding pressure / density value and completes verification.Compared with prior art, the present application has the advantages of high anti-jitter adaptability and universality, accurate verification result, intelligent verification process and the like.

The invention discloses a true random number generator entropy source for enhancing jitter noise level, comprising: a plurality of basic units, each basic unit comprising an L input end, an R input end and a total output end; the L input end is connected with the total output end of the previous-stage basic unit; the L input end is connected with the L input end, the R input end is connected with the total output end of the basic unit of the later stage or the later stages, and when the L input end is the same as the R input end, the total output end is in a state opposite to the previous state and is in an oscillation state in time; when the L input end is different from the R input end, the total output end takes the value of the L input end. By implementing the entropy source of the true random number generator, the jitter noise level can be effectively enhanced, and continuous oscillation under the condition of lacking a steady state is ensured, so that higher-quality randomness is provided, and the entropy source is suitable for a high-performance true random number generator.

The application discloses a kind of single ring oscillator true random number generator circuit structure, the circuit structure includes ring oscillator, fast oscillation circuit, counter, eigen transistor, exclusive or gate, reset signal generating circuit and post-processing circuit.The circuit structure of above-mentioned, the two different inverter stages of ring oscillator are XOR and the width of rectangular pulse generated by output is determined by the change caused by time-invariant inherent propagation delay and time-varying jitter noise, the width of the continuous pulse generated is quantified by fast oscillation circuit and counter, that is, the delay change caused by jitter noise can be represented from the minimum significant bit of the above-mentioned counter;By changing the gate voltage of eigen transistor, the supply voltage of ring oscillator is adjusted, so that the amplitude of the jitter noise of ring oscillator is maximized by reducing its charging / discharging current, so that the true random number generator circuit structure has the application effect of high energy efficiency and high throughput.