Welcome to apply | Three propositions of RIGOL are shortlisted for the industrial proposition track of the 9th China International "Internet +" College Student Innovation and Entrepreneurship Competition
China International “Internet+” College Students Innovation and Entrepreneurship Competition
The company always adheres to original technological innovation, independently develops key core technologies, and empowers customers in more than 90 countries and regions around the world with test and measurement applications through the "RIGOL" brand, in digital oscilloscopes, radio frequency instruments, waveform generators, power supplies and electronic loads. We continue to innovate in general electronic measuring instrument products such as multimeters and data collectors , and provide chip-level, module-level and system-level multi-level solutions to help a wide range of customers in communications, new energy, semiconductors, education, scientific research and system integration solve test and measurement problems. Complex challenges enable unlimited possibilities for scientific and technological exploration.
For more than 20 years, Puyuan Precision Technology has been committed to helping engineers achieve innovation in the field of science and technology. It not only has an extraordinary influence in the development of electronic measuring instrument products and solutions, but also shoulders the responsibility of assisting the cultivation of innovative engineering talents in the industry. . In this competition, Puyuan Jingdian focuses on the construction of new engineering disciplines, and implements the concepts of promoting teaching, learning, and innovation through competition , so as to connect the intellectual resources of universities with the development needs of enterprises, and assist universities to integrate innovation and entrepreneurship education practices with industry Development is organically integrated, cultivating students' ability to solve industrial development problems, and deepening the in-depth integration of industry, academia and research .
Proposition 1
Digital predistortion (DPD) technology is a digital signal processing technology commonly used in the field of wireless communications. It can effectively suppress the nonlinear distortion of the transmitter signal link, improve the link linearity and reduce harmonics and spurious signals in the signal.
In recent years, DPD technology has been increasingly used in test and measurement instruments. Both American and German companies have applied DPD technology in their signal source products to achieve high linearity that cannot be achieved purely based on linear power amplifiers combined with harmonic filters. Some of these signal sources can achieve harmonic and spurious levels better than -90dBc in the 1GHz band.
In China, with the rapid progress of wireless communication technology, the DPD technology used in wireless base stations and wireless terminals has become very mature. However, DPD technology in wireless communications is limited to the linearization of the transmitter link, especially the power amplifier. Its use frequency is low, the bandwidth is narrow, and the adaptable hardware architecture is relatively fixed. It is not suitable for broadband application scenarios ≥1GHz. The technical level There is still a certain gap with overseas countries.
The development of DPD technology for wideband DAC linearization has positive significance for reducing power consumption, improving system dynamic range, increasing transmission bandwidth, and extending radar detection range in fields such as test and measurement, communications, and radar. It is also an important technology development trend in the future.
Title content:
Develop a DPD-based predistortion algorithm to improve DAC linearity:
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DAC resolution: 16bit, sampling rate 5GSa/s, signal bandwidth 2GHz
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Within the 1GHz bandwidth of the output signal, the SFDR is improved by ≥15dB. SFDR improvement ≥10dB within 2GHz bandwidth
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Deterioration of signal-to-noise ratio in the whole frequency band <3dB
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In the temperature range of 0~85℃ and the power supply fluctuation range of ±5%, the nonlinear effects of temperature, power supply and other fluctuations on the nonlinearity can be automatically compensated in the background
DC microgrid technology has been widely used and developed at home and abroad, especially in Europe and the United States, which have begun to invest heavily in the construction and application of DC microgrids, and domestically it has gradually become a key area of national support.
DC microgrid technology has obvious advantages in DC voltage regulation, DC current transmission, load control and power management. With the continuous innovation of technology, DC microgrid technology will have broad application prospects in distributed energy and other aspects with its higher reliability, scalability, security and efficiency.
At present, DC microgrid needs to be further improved in terms of supply voltage flexibility and response speed to improve the voltage stability on the power side, adapt to the power supply needs of different loads and provide necessary load protection.
Title content:
Develop a DC power supply module and its microgrid control system that can be used for large-scale networking, which can realize voltage control, automatic module current sharing control, dynamic grid-connected and off-grid management, redundancy and exception handling, fault detection, and inter-module synchronous communication. technology, grid impedance measurement, etc.
need:
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The number of power supply modules that can be connected in parallel is >100
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Maximum current>54kA
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Responsible for transient response time <200us
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With adjustable constant current function
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Voltage programming time <500us
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10% of the number of power module failures will not cause network disconnection
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Dynamic grid connection and off-grid management based on output settings
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With CC, CV, CP and other working modes
Proposition background:
High-speed serial data interface plays an irreplaceable role in the data transmission process and has become the cornerstone of wired broadband transmission. In the development and production process of high-speed serial interface chips, modules and equipment, broadband oscilloscopes must be used for signal quality testing. Currently, this type of oscilloscope serial signal quality analysis software is completely monopolized by foreign manufacturers.
At present, domestic oscilloscope manufacturers are catching up in hard indicators such as bandwidth and sampling rate of oscilloscopes. However, there is still a big gap between them and international manufacturers in terms of supporting serial signal quality analysis software. Mastering technologies such as equalization and jitter analysis of high-speed serial signals is crucial. The next step is to realize a complete solution for high-speed serial signal quality analysis and break the monopoly of international manufacturers in this field.Title content:
As high-speed serial data rates continue to increase, non-ideal factors such as channel loss, crosstalk, and dispersion will cause greater signal distortion. In order to effectively recover the transmitter signal from the distorted signal, the signal must be equalized.
This topic studies efficient and accurate serial signal equalization and jitter algorithms, which are used for the high-speed serial bus consistency analysis function of high-end oscilloscopes. Develop serial signal equalization filtering algorithms such as DFE, FFE, and CTLE, as well as clock recovery software algorithms with optional loop filter structures and configurable loop filter parameters to implement serial signal jitter analysis functions.
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Design serial signal equalization and jitter analysis algorithms
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Support decoding analysis of NRZ code type and PAM code type
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DFE, FFE, CTLE equalizer algorithm
Details of the shortlisted propositions, contact information of the proposition parties, etc. can be viewed on the above website. The registration system is open from June 28 to August 15, 2023, Beijing time .
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Contact information: jiangjiahui@rigol.com
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