Direct Digital Synthesizer of Phase-Manipulated Signals, Based on the Direct Digital Synthesis Method

Strelnikov, I. V.; Ryabov, I. V.; Klyuzhev, E. S.

doi:10.1109/synchroinfo49631.2020.9166040

Cited by 8 publications

(2 citation statements)

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“…The binary number in the phase register provides the primary input to the phase accumulator. I. V. Strelnikov [10] implemented DDS using phase-manipulated signals. Han Liu [11] used a 5th-order elliptic function filter to filter the sinusoidal driving signal of DDS to improve the driving performance of a two-dimensional MEMS scanning mirror.…”

Section: Frequency Generation By Ddsmentioning

confidence: 99%

Research on Implementation of a PWM Generation Algorithm for Train Stationary Stopping Frequency

Han,

Park,

Kim

et al. 2024

Electronics

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In industrial electronic equipment or communication equipment, a reference clock should be generated for stable operation of the equipment, which requires precise and stable reference frequency generation. As a method for generating this reference frequency, an analog method called PLL (phase locked-loop) has been devised and widely used. However, in order to make a more precise and stable reference frequency simple and economical, a DDS (direct digital synthesizer) has been developed. In this paper, we propose a stable and accurate method to generate a low frequency of the PWM method via pure logic circuit configuration without a microprocessor for digital reference frequency generation. Depending on the electronic communication equipment, the required reference frequency varies from a low frequency to a very high frequency. The reference frequency synthesis required in these frequency bands has been studied in various ways, but in industries such as railways, the low-frequency band based on the DDS method is used. In particular, it is very important to operate without a single operating error or failure in order to obtain information for stopping the train. Therefore, it is necessary to design a pure logic method that excludes a stored program type processor that minimizes the possibility of temporary interruption due to disturbance such as surge or high voltage. Therefore, through this study, the algorithm is implemented so that the duty ratio is output at 50:50, the circuit is configured so that two target frequencies are generated at the same time, and the performance is verified by generating the low-frequency band used for stopping the railway train. It was confirmed that the accuracy and stability were improved compared to the analog method used for stopping the railway train, and it was verified that the frequency resolution was superior to the similar results obtained in the digital frequency synthesis field so far.

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Section: Frequency Generation By Ddsmentioning

confidence: 99%

Research on Implementation of a PWM Generation Algorithm for Train Stationary Stopping Frequency

Han,

Park,

Kim

et al. 2024

Electronics

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“…Based on the position trajectory of the floating node in CGCS2000, considering the characteristics of the measured wind speed data, the three-dimensional velocity data corresponding to each point on the position trajectory are obtained by linear interpolation. The dataset is the numerical simulation results of Super Typhoon Usagi [29] in 2013, including the meteorological data in the time range from 12:00 on September 19 to 00:00 on September 20. The horizontal orientation of data uses grid points of equal latitude and longitude: 300 grid points in the East-West direction and 300 grid points in the North-South direction.…”

Section: Multidimensional Linear Interpolationmentioning

confidence: 99%

Motion Model of Floating Weather Sensing Node for Typhoon Detection

Dong

Cao

2022

Complex Syst. Model. Simul.

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To improve the accuracy of typhoon prediction, it is necessary to detect the internal structure of a typhoon. The motion model of a floating weather sensing node becomes the key to affect the channel frequency expansion performance and communication quality. This study proposes a floating weather sensing node motion modeling method based on the chaotic mapping. After the chaotic attractor is obtained by simulation, the position trajectory of the floating weather sensing node is obtained by space and coordinate conversion, and the three-dimensional velocity of each point on the position trajectory is obtained by multidimensional linear interpolation. On this basis, the established motion model is used to study the Doppler frequency shift, which is based on the software and physical platform. The software simulates the relative motion of the transceiver and calculates the Doppler frequency shift. The physical platform can add the Doppler frequency shift to the actual transmitted signal. The results show that this method can effectively reflect the influence of the floating weather sensing node motion on signal transmission. It is helpful to research the characteristics of the communication link and the design of a signal transceiver for typhoon detection to further improve the communication quality and to obtain more accurate interior structure characteristic data of a typhoon.

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