COFDM Relay Repeater
ड्रोन यूएवी वायरलेस वीडियो ट्रांसमीटर और रिसीवर Vcan1870 के लिए COFDM रिले रिपीटर मॉड्यूल
विषयसूची
परिचय
The module is a relay module, not a completed item. Customers need to add a power amplifier, filters, 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 (उदाहरण के लिए:. 400मेगाहर्टज) for communication with the relay, and a different frequency (उदाहरण के लिए:. 700मेगाहर्टज) for communication between the relay module with the receiver. The separation between the two should be as large as possible.
विशेषता
- Wireless Video COFDM Video Data demodulation and re-modulation
- Stable signal transfer in NLOS and high-speed moving (less than 600km/hour)
- समायोज्य कार्य आवृत्ति, बैंडविड्थ, संचरण शक्ति, वगैरह (विशेष Parameter Configure Tool or UART STM32 LoRA )
- Lowest latency 200-300 मिलीसेकंड
- Widely frequency range 200Mhz-3000Mhz
- समर्थन एईएस256
- बैंडविड्थ 1Mhz-8Mhz वैकल्पिक
- Video signal repeater for long-distance
परिचय
विनिर्देश:
आईओ
| आरएफ इनपुट | Two SMA females (to receive the signal) |
| आरएफ आउटपुट | MMCX female (to send out the signal again) |
| control UART | 4पिन PH1.25mm कनेक्टर |
| विद्युत आगम | 2PIN PH2.54mm phenix Connector |
| TF-card | For firmware update |
| Power led | red LED, constant light when the device is normally powered |
| Link led | green led, blinks on transmitting the received data |
Demodulation and Modulation
| मॉड्यूलेशन प्रारूप | COFDM(डीवीबी-टी) |
| वाहक | 2के |
| बैंडविड्थ | 1 मेगाहर्ट्ज से 8 मेगाहर्ट्ज तक कॉन्फ़िगर करने योग्य, चरण दर 1KHz |
| एफईसी | 1/2, 2/3, 3/4, 5/6, 7/8 |
| गार्ड अंतराल | 1/32, 1/16, 1/8, 1/4 |
| तारामंडल | क्यूपीएसके, 16QAM, 64QAM |
| बिटरेट | 0.5एमबीपीएस से 31.67 एमबीपीएस |
RF Received
| फ़्रीक्वेंसी बैंड | 160मेगाहर्ट्ज~860 मेगाहर्ट्ज (need an extra down converter block for 860-2300Mhz) |
| ट्यूनिंग चरण का आकार | 1KHz |
| संवेदनशीलता | -97±1dBm(बीडब्ल्यू=8मेगाहर्ट्ज, क्यूपीएसके, सीआर=2/3, जीआई=1/16) for one channel and add 3dBm for two-channel |
RF Transmitted
| फ़्रीक्वेंसी बैंड | 200MHz~2300MHz(other bands can be supported with special manufacturing) |
| ट्यूनिंग चरण का आकार | 1KHz |
| Power out | Configurable, maximum -5dBm(subject to frequency) |
निगरानी एवं नियंत्रण
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) and bandwidth (बी 1)
– TX Transmitted frequency (F2), बैंडविड्थ (बी2), एफईसी, रक्षक अंतराल, तारामंडल, and transmission power
तापमान की रेंज
पूर्ण विशिष्टता: 0° से +70°C परिवेश
भंडारण: -40° से +80°C
बिजली की आवश्यकताएं
इनपुट रेंज: 7~24वीडीसी
बिजली की खपत: <250mA@12V
भौतिक विशेषताएं
आयाम: 73x51x15mm
कुल वजन: 32.4 ग्राम
UART AT commands
The AT commands mainly used in the COFDM Wireless Relay Repeater are एटीडीआर, एटीएसडी, एटीजी, एटीएसआर, एटीजीआर, and ATGB. For the introduction of specific commands, see the document.
पूछे जाने वाले प्रश्न
- 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.
इस समय, 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
- Ultra-low latency
- Minimal processing delay
Since the unit does not decode the video stream internally, there is no video signal available for a local monitor display.
Technically, yes — Ethernet output can be added.
तथापि, this would require additional software and hardware development, including:
- 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, or
- 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.
तथापि, the system can still be monitored and optimized in the following ways:
1. LCD Parameter Configuration Tool Board (अनुशंसित)
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 (आरएसएसआई)
- Signal quality (सीनियर)
- बिट त्रुटि दर (हिट)
- 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 (वैकल्पिक)
If real video monitoring is required, you can connect a standard COFDM receiver near the repeater output side.
इस मामले में:
- 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.
महत्वपूर्ण नोट
The COFDM repeater itself:
- Does not support video decoding
- Does 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, बैंडविड्थ, 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.