انتقال نامتقارن فرکانس بالا و پایین لینک TDD-FDD vcan2002

ویژگی

• Support asymmetric transmission of uplink and downlink frequencies
• Support noise floor detection and automatic frequency selection
• Supports AES256 encryption
• Support long-distance large-bandwidth transmission

پارامتر

The channel can provide a capacity of 4Mbps, and the pod can set to 2Mbps

150km test video

پرسش و پاسخ

س: Can the uplink and downlink working frequencies be configured by the user?

آ: For standard models, the working frequencies are factory preset and cannot be modified by the user.

• Uplink (f2): 1.4 گیگاهرتز
• لینک پایین (f1): 17 گیگاهرتز

If your application requires user-adjustable frequencies, we recommend using the FDD transceiver module.

• TX (آپلینک): User configurable from 170 مگاهرتز به 6000 مگاهرتز
• RX (لینک پایین): User configurable from 170 مگاهرتز به 860 مگاهرتز
• For RX frequencies over 860 مگاهرتز, an additional down-conversion stage is required.

Please select the appropriate model based on whether fixed or user-configurable frequency operation is needed.

س: What are the advantages of the FDD + TDD hybrid technology in this video & data transmission system?

آ: This system combines the best features of FDD (فرکانس دوبلکس) و TDD (Time Division Duplex) to deliver superior performance for professional drone operations.

• Real-time two-way communication with ultra-low latency (FDD advantage): Separate frequencies are used for downlink (ویدئو & data to ground) and uplink (control commands from ground). This enables true simultaneous transmission, so you get smooth live video and instant control response without any waiting or switching delays.
• High spectrum efficiency and flexible bandwidth allocation (TDD advantage): The system dynamically adjusts bandwidth between video and control/data as needed. This allows higher overall data rates and makes the best use of available radio spectrum.
• Excellent anti-interference capability and reliability: With real-time interference detection, انتخاب فرکانس خودکار, adaptive bitrate, انتقال مجدد خودکار, and smart power control, the link remains stable even in complex environments with multipath interference or crowded radio frequencies.
• Long range and high-quality transmission: پشتیبانی می کند تا 200 کیلومتر air-to-ground range and up to 16 مگابیت در ثانیه پهنای باند, allowing you to transmit clear HD video while simultaneously sending telemetry and control data in both directions.

In simple terms: Pure FDD offers excellent low-latency two-way performance but can be less spectrum-efficient. Pure TDD is very efficient and flexible but may introduce slight delays. این FDD + TDD hybrid gives you the perfect balance: زمان تاخیر کم + high efficiency + strong anti-interference performance, making it ideal for demanding drone applications such as power line inspection, واکنش اضطراری, aerial surveying, and long-range surveillance.