◎ Science and Technology Daily Reporter Chengkuan Lu
Reporters learned from the Aerospace Information Innovation Research Institute of the Chinese Academy of Sciences (hereinafter referred to as "AII") on the 26th that researchers from this institute and other units have recently successfully conducted experiments on a new ground technology for satellite-to-ground communication, achieving a communication speed of up to 2100 megabits per second in the X-band, increasing the microwave communication code rate by 75%. This is currently the highest speed for single-channel satellite-to-ground communication in China's X-band.
At present, domestic civilian satellites mainly use the X-band for data transmission, with single-channel transmission speeds generally ranging from 450 megabits per second to 1200 megabits per second. "However, these speeds are no longer sufficient to meet the transmission needs of massive space exploration data, affecting the efficiency of satellite usage," said Zhang Yunmeng, the project leader and senior engineer at AII.
In order to solve this problem, researchers proposed a high-order system high-code-rate data transmission scheme under microwave technology. This scheme maximizes the utilization of existing ground equipment while significantly improving the data transmission speed between satellites and the ground by upgrading the technical capabilities of key devices such as modems.
"This experiment has broken through a series of key technologies, including phase noise compensation, providing a new cost-effective technical solution to address China's satellite-to-ground communication bottleneck," said Huang Peng, a researcher at AII.
Source: Science and Technology Daily
Original article: https://www.toutiao.com/article/7508935244515394058/
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