Bộ thu phát dữ liệu video không dây hai chiều cho rơle UAV

Q: Q1: Can I use different frequencies for uplink and downlink?

A: It’s not necessary. The system uses TDD on the same frequency, alternating time slots between send and receive. FDD models support set different frequencies for uplink and downlink.

Q: Q2: What hardware do I need to add a relay function?

A: Just one extra two-way transceiver module configured as a relay node.

Q: Q3: How do I configure the time slot ratio?

A: It can be modified in firmware or configuration software — change from 1:4 to 2:3 for two-way relay mode.

Q: Q4: Will latency increase in relay mode?

A: Only slightly. The system’s OFDM frame design keeps total delay under 50ms even with one relay hop.

Q: Q5: Can multiple relays be added for extended range?

A: Yes, multi-hop relay is supported by chaining additional transceivers, though timing synchronization must be maintained.

Mục lục

Two-Way Wireless Video Data Transceiver for UAV Relay Applications

In modern UAV (Máy bay không người lái) hệ thống, wireless video and data transmission plays a critical role in ensuring real-time situational awareness, command control, and feedback. Traditional COFDM or TDD-based transmitters are typically used in point-to-point communication. Tuy nhiên, as mission distances increase and terrain becomes complex, the need for relay transmission between drones becomes essential.

Với chúng tôi two-way COFDM wireless video data transceiver, UAV relay can be easily implemented — without changing the base system structure. All that’s required is one additional transceiver, and by adjusting the time slot ratio from 1:4 ĐẾN 2:3, full-duplex two-way relay communication can be achieved.

Key Concept: Two-Way Transmission and Time Slot Adjustment

Our COFDM-based system operates on a TDD (Song công phân chia thời gian) mechanism, meaning the same frequency band alternates between transmit and receive time slots.

In a traditional single-link system, Một 1:4 time slot ratio is used — one slot for uplink (video/data from UAV to ground) and four slots for downlink control or feedback.

For UAV relay applications, we adjust the slot ratio to 2:3, enabling both drones to transmit and receive alternately within the same frequency band.

This method allows:

Drone A to send video/data to Drone B (tiếp sức)
Drone B to forward data to the ground control station
Ground control to send command data back via Drone B to Drone A

All achieved in a đồng bộ, độ trễ thấp time slot cycle.

Technical Advantages

Simple Hardware Upgrade
You only need to add one transceiver module as a relay node. No additional frequency allocation or complicated RF synchronization is required.
Độ trễ thấp, High Stability
Thanks to COFDM modulation and precise TDD slot control, latency remains under 50bệnh đa xơ cứng, even in relay operation.
Frequency Efficiency
Both UAVs share the same frequency channel, eliminating the need for multiple RF bands and minimizing interference.
Bi-Directional Transmission
Unlike one-way analog transmitters, the two-way transceiver supports simultaneous video + dữ liệu + điều khiển quá trình lây truyền.
Adaptive for Various Applications
Lý tưởng cho long-range drones, relay stations, mountain terrain, maritime patrol, hoặc ứng phó khẩn cấp where direct LOS (tầm nhìn) is unavailable.

System Example

Kịch bản:
A drone flies behind a mountain ridge where direct communication with the ground station is lost.

Giải pháp:
Place another drone in the air to serve as a relay.

Cấu hình:

Trạm điều khiển mặt đất (GCS): Two-way COFDM transceiver
UAV1: Two-way transceiver (Nút chuyển tiếp)
UAV2: Two-way transceiver (Frontline Node)

Time Slot Setup:

Original: 1 đường lên : 4 đường xuống (tiêu chuẩn)
Chế độ chuyển tiếp: 2 đường lên : 3 đường xuống (balanced bidirectional flow)

Result:
UAV2 sends video to UAV1 → UAV1 forwards to GCS → GCS sends command → UAV1 relays back to UAV2 — all within one synchronized TDD frame.

Thông số kỹ thuật (Ví dụ)

tham số	Sự miêu tả
Dải tần số	200MHz–6GHz customizable
điều chế	COFDM, QPSK/16QAM/64QAM
Chế độ song công	TDD (có thể điều chỉnh 1:4 hoặc là 2:3 slot)
Độ trễ	<50bệnh đa xơ cứng (end-to-end)
Định dạng Video	H.265/H.264 up to 1080P
Giao diện dữ liệu	UART / Ethernet
Khoảng cách truyền	Up to 50km (LOS) or relay-extended
Quyền lực	10W amplifier optional for long-range
Application	UAV relay, quân đội, giải thoát, điều tra

Kịch bản ứng dụng

Drone Relay for Long-Distance FPV
Emergency Communication Extension
Mountain or Forest Surveillance
Maritime and Offshore Operations
Temporary Network Relay in Field Missions

Hỏi đáp

Q1: Can I use different frequencies for uplink and downlink?

Một: It’s not necessary. The system uses TDD on the same frequency, alternating time slots between send and receive. FDD models support set different frequencies for uplink and downlink.

Q2: What hardware do I need to add a relay function?

Một: Just one extra two-way transceiver module configured as a relay node.

Q3: How do I configure the time slot ratio?

Một: It can be modified in firmware or configuration software — change from 1:4 ĐẾN 2:3 for two-way relay mode.

Q4: Will latency increase in relay mode?

Một: Only slightly. The system’s OFDM frame design keeps total delay under 50ms even with one relay hop.

Q5: Can multiple relays be added for extended range?

Một: Vâng, multi-hop relay is supported by chaining additional transceivers, though timing synchronization must be maintained.

Phần kết luận

By simply adding one more transceiver và adjusting the time slot ratio, UAVs can form a reliable two-way relay network that extends range, maintains low latency, and enables full bidirectional communication. This flexible design ensures mission success in complex terrains or beyond-visual-line-of-sight operations — all while keeping hardware integration simple and efficient.