COFDM Relay Repeater
Mô-đun lặp lại rơle COFDM cho máy phát và thu video không dây UAV Vcan1870
Mục lục
Giới thiệu
The module is a relay module, not a completed item. Customers need to add a power amplifier, bộ lọc, and receiving and transmitting antennas for it to work effectively. These need to be customized according to the two working frequencies selected by the customer.
To prevent interference, the drone employs a single frequency (ví dụ. 400Mhz) for communication with the relay, and a different frequency (ví dụ. 700Mhz) for communication between the relay module with the receiver. The separation between the two should be as large as possible.
Tính năng
- Wireless Video COFDM Video Data demodulation and re-modulation
- Stable signal transfer in NLOS and high-speed moving (less than 600km/hour)
- Tần số làm việc có thể điều chỉnh, băng thông, công suất truyền tải, vân vân (Đặc biệt Parameter Configure Tool or UART STM32 LoRA )
- Lowest latency 200-300 mili giây
- Widely frequency range 200Mhz-3000Mhz
- Ủng hộ AES256
- Băng thông 1Mhz-8Mhz không bắt buộc
- Video signal repeater for long-distance
Giới thiệu
Đặc điểm kỹ thuật:
IO
| đầu vào RF | Two SMA females (to receive the signal) |
| đầu ra RF | MMCX nữ (to send out the signal again) |
| control UART | 4Đầu nối PIN PH1.25mm |
| Cấp nguồn vào | 2Đầu nối phenix PIN PH2.54mm |
| thẻ TF | Để cập nhật chương trình cơ sở |
| Đèn led nguồn | red LED, constant light when the device is normally powered |
| Liên kết dẫn | đèn xanh, nhấp nháy khi truyền dữ liệu nhận được |
Giải điều chế và điều chế
| Định dạng điều chế | COFDM(DVB-T) |
| Hãng vận chuyển | 2K |
| Băng thông | Có thể định cấu hình từ 1 MHz đến 8 MHz, từng bước 1KHz |
| FEC | 1/2, 2/3, 3/4, 5/6, 7/8 |
| Khoảng bảo vệ | 1/32, 1/16, 1/8, 1/4 |
| Chòm sao | QPSK, 16QAM, 64QAM |
| Tốc độ bit | 0.5Mb/giây đến 31,67Mb/giây |
Đã nhận được RF
| Dải tần số | 160MHz~860 MHz (need an extra down converter block for 860-2300Mhz) |
| Kích thước bước điều chỉnh | 1KHz |
| Độ nhạy | -97±1dBm(BW=8 MHz, QPSK, CR=2/3, GI=1/16) for one channel and add 3dBm for two-channel |
Truyền RF
| Dải tần số | 200MHz~2300 MHz(các ban nhạc khác có thể được hỗ trợ bằng cách sản xuất đặc biệt) |
| Kích thước bước điều chỉnh | 1KHz |
| Mất điện | Có thể cấu hình, tối đa -5dBm(tùy thuộc vào tần số) |
Giám sát và kiểm soát
This COFDM relay repeater module can complete setup with our Parameter Configure Tool or STM32+LoRA (or other devices) via control uart. With our parameter configure too, the following parameters can be set:
– RX Received frequency (F1) và băng thông (B1)
– TX Transmitted frequency (F2), băng thông (B2), FEC, khoảng bảo vệ, constellation, and transmission power
Phạm vi nhiệt độ
Thông số kỹ thuật đầy đủ: 0° đến +70°C Môi trường xung quanh
Kho: –40° đến +80°C
Yêu cầu về nguồn điện
Phạm vi đầu vào: 7~24VDC
Tiêu thụ điện năng: <250mA@12V
Đặc điểm vật lý
Kích thước: 73x51x15mm
tổng trọng lượng: 32.4 gam
Lệnh UART AT
The AT commands mainly used in the COFDM Wireless Relay Repeater are ATDR, ATSD, ATGD, ATSR, ATGR, and ATGB. For the introduction of specific commands, see the document.
Câu hỏi thường gặp
- Our COFDM Video Transceiver relay repeater supports 170-860Mhz. The COFDM transmitter also supports 2300Mhz, but the COFDM receiver only supports up to 860Mhz, 861-930Mhz receiver our COFDM-221 supports, over 930Mhz-2300Mhz needs to plus the frequency downconverter block to support.
- Our COFDM relay repeater module supports all the COFDM transmitters and receivers, the transmission distance depends on your external power amplifier and filter support.
Ngay bây giờ, adding a monitor is not feasible.
The current COFDM repeater design does not include any display output interface, and it also does not support video decoding functionality. The repeater works by directly receiving the COFDM data stream from the receiver module, changing the RF frequency, and retransmitting the data exactly as received.
This architecture is intentionally designed to achieve:
- The simplest and most reliable implementation
- Độ trễ cực thấp
- Minimal processing delay
Since the unit does not decode the video stream internally, there is no video signal available for a local monitor display.
Về mặt kỹ thuật, yes — Ethernet output can be added.
Tuy nhiên, this would require additional software and hardware development, bao gồm:
- Data buffering and forwarding logic
- Network transmission program development
- Web-based configuration interface
- IP address and port management functions
- System testing and optimization
Because of the extra development workload, this feature would typically require:
- A sufficient order quantity, hoặc là
- A separate NRE/development fee
If your project has volume demand or a dedicated budget for customization, we can evaluate this option further.
The COFDM repeater module itself does not include a built-in display or video output interface, so it cannot directly show tuning status or video images. This is because the repeater is designed as a transparent RF relay device that focuses on low latency and real-time frequency translation, without performing video decoding.
Tuy nhiên, the system can still be monitored and optimized in the following ways:
1. LCD Parameter Configuration Tool Board (Khuyến khích)
The repeater can be connected to an external LCD parameter configuration tool board.
Through this tool, you can directly monitor key RF performance indicators such as:
- Received signal strength (RSSI)
- Signal quality (SNR)
- Tỷ lệ lỗi bit (BER)
- Link status and other RF parameters
These indicators are commonly used to determine whether the link is properly tuned and operating under optimal conditions.
2. Using an External Receiver for Video Monitoring (Không bắt buộc)
If real video monitoring is required, you can connect a standard COFDM receiver near the repeater output side.
Trong trường hợp này:
- The repeater still performs RF frequency translation only
- The receiver handles video decoding
- You can connect the receiver to a display or monitor to view the live video
This effectively allows you to check system performance visually if needed.
Important Note
The COFDM repeater itself:
- Làm not support video decoding
- Làm not output HDMI / CVBS / IP video signals
- Only performs transparent RF relay with frequency conversion
The below model is good for a two-way TDD bidirectional link of the Wireless relay transmitter and receiver or wireless transmitter and receiver relay repeater.
iVcan.com –
The Vcan1870 COFDM Relay Repeater module is an excellent addition to any UAV or drone wireless video transmission setup. Designed as a flexible relay, it reliably demodulates incoming COFDM signals and instantly re-modulates them for transmission, ensuring stable long-range video links. Its adjustable frequency, băng thông, and transmission power make it highly adaptable for different environments, while support for AES256 ensures secure communication. With low latency of 200–300ms and robust NLOS performance even at high speeds, this module is perfect for professional drone applications requiring reliable, high-quality video relay.