Yang Qianli

Yang Qianli

Yang Qianli (October 12, 1933 - March 11, 2020), a native of Jiangyin, Jiangsu Province, once served as deputy director of Communication Department of general staff of PLA, senior engineer, major general, and member of China Electronics Society, China communication society, and international IEEE society.

In the early morning of March 11, 2020, Yang Qianli died in Beijing at the age of 87.

Life figures

Born in Jiangyin County, Jiangsu Province on October 12, 1933. In his childhood, he lived with his parents in Jiujiang City, Jiangxi Province. He first studied in the Central Primary School in the third district of Baishui Town, Guangchang county, and then went to Nanchang provincial No.1 middle school and Jiujiang Tongwen middle school.

From August 1950 to January 1951, studied in the Department of electrical engineering, Nanjing University.

From January 1951 to July 1956, he studied in the Communication Engineering College of Zhangjiakou people's Liberation Army (initially known as "the first Department of Military Commission Engineering School" and later renamed as the communication college after December 1955).

The rank of captain was awarded in June 1956.

From July 1956 to November 1969, he served as a teacher of communication college, communication Corps college, military Telecommunication Engineering College and communication Corps Engineering College (Zhangjiakou, Xi'an, Chongqing).

From November 1969 to May 1971, he was a student of the May 7th cadre school (Xuchang).

From May 1971 to February 1980, he worked as an engineer in the Department of science and technology of the 19th Research Institute of signalmen.

From February 1980 to July 1982, he was the deputy chief engineer of the science and Technology Department of the Communications Department of the general staff.

From July 1982 to January 1984, he served as director of the science and technology division of the Communications Department of the general staff.

From January 1984 to July 1991, he served as deputy director of the Communications Department of the general staff (in charge of scientific research, equipment and training), concurrently as director and deputy director of the science and Technology Committee of the Communications Department of the general staff, director of the senior professional title evaluation committee of the communications specialty of the general staff, and member of the science and Technology Committee of the general staff.

The rank of major general was awarded in September 1988.

From July 1991 to December 2000, he served as a researcher of the 61st Research Institute of the general staff, vice chief designer of military communication satellite engineering, chief designer of application system, vice chairman of China Electronics Society, and executive director of China Communications Society.

Participated in the design and test of the first generation synchronous communication satellite communication system in China. He has visited eastern Europe, Western Europe, North America, Japan and other countries more than 20 times to coordinate with relevant countries to carry out satellite communication tests.

He has been specially employed as a part-time professor and doctoral supervisor in more than 10 universities such as Peking University, and as a consultant or technical expert by China Securities Regulatory Commission, China International Engineering Consulting Corporation, China satellite communication broadcasting group, etc.

In the early morning of March 11, 2020, Yang Qianli died in Beijing at the age of 87.

Social Appointments

He is also a member of the expert group of the information leading group office of the State Council, vice chairman of the China Electronics Society, executive director of the China Communications Society, deputy director of the academic work committee, director of the national defense communication technology professional committee, member of the Beijing Municipal Committee of the Chinese people's Political Consultative Conference, member of the satellite payload professional group, member of the satellite application professional group, member of the military instrumentation professional group, and member of many universities and colleges He is a member of the academic committee of the State Key Laboratory, a senior member of the International Institute of electrical and Electronic Engineers (IEEE), and executive chairman of Beijing Branch.

Get honor

He presided over the project of "Research on the theory and application of national defense communication network construction". In 1997, he won the first prize of the military science and technology progress award, and in 1999, he won the second prize of excellent achievements of the National Social Science Foundation project. In 1998, the project of "Research on the construction of national defense communication network" was awarded the third prize of national science and technology progress award. In 1999, he was awarded the "major contribution award of PLA professional technology" by the General Staff Department, General Political Department, General Logistics Department and general equipment department. He presided over the military communication satellite application system project and won the first prize of the military science and Technology Progress Award in 2001. He was also awarded the title of "advanced individual in research and construction of military three star project" by the General Equipment Department of the Chinese people's Liberation Army and the Commission of science, technology and industry for national defense.

scientific research

Meteor trail communication is a long-distance communication based on the reflection or scattering of radio waves by the transient ionization traces formed by meteors passing through the atmosphere. It has strong survivability and strong invulnerability, and has attracted the attention of the military of various countries in the late 1950s. In 1960, Xi'an military Telecommunication Engineering College undertook the meteor trail communication research project. Yang Qianli participated in the research, and was mainly responsible for the overall design of meteor trail communication system, the formulation of technical index requirements for each subsystem, the overall joint test of the system and the communication test of the experimental circuit. The technical demonstration report of meteor trail communication system, the overall design of meteor trail communication system and the index report of subsystem prepared by him have become the important basis for the research of this project. In 1957 and 1958, he participated in the organization and translation of the Anthologies on meteor trail communication system published in the American pire magazine, which played an important reference role in the research of this project.

From 1960 to 1961, when he led the establishment of China's first 1000 km meteor trail communication test circuit, together with other members of the project team, he conducted a lot of tests, tests, statistics and analysis, and mastered the mechanism of meteor trail ionization intensity, scattering of electromagnetic waves or specular reflection, as well as the variation law with seasons and day and night. He proposed the technical conception of using the main signal fixed value timing truncation and using the burst es layer to improve the communication efficiency, which solved the bit error problem caused by the strong fluctuation oscillation of meteor ionization signal tail and effectively improved the system performance. At the end of the test, he wrote a summary report on the meteor trail communication system test. He participated in the early exploration of meteor trail communication, which laid a certain foundation for the later in-depth research and important achievements of Xi'an military telecommunication engineering college.

In 1974, with the approval of Chairman Mao Zedong and the personal deployment of Premier Zhou Enlai, China's first generation synchronous communication satellite project was officially launched. The project is of large scale, new technology, wide coverage and complex composition, including television, broadcasting, fax, analog telephone, digital telephone, Telegraph of various rates and other services, including marine, land, fixed, mobile and other station types. At the end of 1974, Yang Qianli participated in the research and development of the communication system of the project, and completed the overall technical scheme of the project and the system joint test scheme and plan, which became the basis for guiding the construction of the project. In order to solve the problems of computer simulation and measurement of nonlinear intermodulation of satellite transponder, he participated in the development of the mathematical model of each carrier in the overall scheme preparation, demonstration and optimization design. In order to make full use of the transponder capacity, he proposed to make full use of the frequency resources between the wide and narrow band of the transponder, so that a transponder can accommodate more digital group carriers on the basis of meeting the crosstalk modulation index. In the case of small satellite power, he proposed to use the threshold expansion demodulation method to improve the TV reception effect. During the organization and guidance of the whole system joint commissioning, he not only participated in the system operation, equipment connection, problem and result analysis, but also organized the equipment installation and technical coordination of the first batch of domestic satellite earth stations, and timely solved the problems such as uneven temperature of constant temperature parametric noise at Kunming station, low installation accuracy of 15m FRP antenna panel at Urumqi station and large waveguide loss. When organizing the first ground joint test of the communication system, he was responsible for drawing up plans and schemes, organizing the training of joint test personnel, and proving that the ground communication system met the design requirements through repeated tests and analysis.

In 1977, while developing the first generation of synchronous satellite communication system, Yang Qianli participated in the signing of an agreement on the cooperation between China and West Germany in the use of the "Symphony" satellite developed by Germany and France for communication test, and was designated as the chief technical coordinator of China. After returning to China, he organized the preparation of the overall technical plan and implementation plan for the "Symphony" satellite test, organized and coordinated the domestic parties to carry out the test preparation, and determined the site and earth station type of the test station. Since 1978, he has organized all kinds of earth stations to carry out satellite earth joint tests by using the "Symphony" satellite. In the joint test, he personally tested and analyzed the performance indicators of the earth station, and organized relevant technical personnel to solve the problems one by one when they found them. The transmission and test of TV, voice and data signals have been completed successively, and the TV reception quality of earth stations with different antenna diameters has been compared and analyzed. Through the comparative test of flying cesium clock method, it is proved that the two-way delay cancellation method of satellites participated in the test by Chinese Academy of Metrology has reached the international advanced level, and the advanced and feasible satellite audio-visual education test technical schemes of several universities of the Ministry of higher education of China have been verified Three large satellite earth stations just built in China were used for the first time to open a video conference on West Germany through the "Symphony" satellite. During the experiment, he also used the satellite signal transmitted by "Symphony" satellite to study the law of signal fluctuation and the influence of ionosphere, and concluded that Faraday effect is not the main factor, while atmospheric turbulence at low elevation is the main factor affecting signal fluctuation. He also verified the advanced technologies such as large loop frequency calibration of small mobile station satellite. It not only proves that the satellite communication equipment of large, medium and small earth stations developed by China has reached the international level, but also cultivates a number of technical backbones for the development, production and use of China's communication satellites. The test won the first prize of the national defense industry major improvement award. In January 1980, when he led the Chinese "Symphony" satellite test delegation to West Berlin to attend the international "Symphony" satellite test summary conference, he read out papers entitled "Symphony" satellite test in China "and" signal fluctuation analysis in Symphony "satellite test", which were highly praised by the experts.

On April 8, 1984,

Chinese PinYin : Yang Qian Li