


China Telecom takes the lead in completing the industry's first integrated verification of 3.5GHz frequency band and multi-frequency collaborative synaesthesia
July 26 news, according to official news from China Telecom, recently, China Telecom Research Institute, China Telecom Zhejiang Company and Beijing University of Posts and Telecommunications jointly completed the industry's first 3.5GHz frequency band and the first high-low frequency collaborative synaesthesia integration in Ningbo, Zhejiang Through chemical testing and verification, it has demonstrated three major technical advantages: long sensing distance, low sensing overhead, and zero communication interruption. In addition, under complex weather conditions such as rain and fog, it can realize multi-domain multi-target positioning speed measurement and trajectory tracking of ships in the sea and drones in the air. The highlights of the attached official introduction are as follows: First, the industry’s first verification of collaborative synaesthesia capabilities in the 3.5GHz frequency band and high and low frequencies, reaching a sensing distance of 1.6 kilometers. This is the industry's first synaesthesia test in the 3.5GHz frequency band, and collaborative sensing of targets was carried out simultaneously based on low-frequency and high-frequency bands. In this test, the sensing distance reached 1.6 kilometers and the sensing accuracy reached sub-meter level. For the first time, the advantages of fusion technology of long low-frequency sensing distance and high high-frequency sensing accuracy were realized and verified.
Innovation point: Perception waveform and communication waveform integration design, based on comb OFDM technology, realizes simultaneous transmission of perception and communication signals.
Advantages: Perceived overhead is reduced by more than 70%.
3. Multi-domain interference cancellation technology
Goal: Zero interruption of communication in the full sensing process.
Innovation point: Multi-domain interference cancellation technology maintains zero-interruption communication transmission during long-distance sensing.
4. Synaesthesia performance in complex environments
Test verification: The impact of rain, foggy weather and sea clutter on synaesthesia performance verifies the stability of synaesthesia positioning, speed measurement and tracking performance in complex environments.
5. Multi-domain target perception and tracking
Test content: Multi-domain target perception and tracking capabilities under the coexistence of airspace drones and sea-area ship targets.
Meaning: Provide effective testing and verification basis for the development of global synaesthesia technology.
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