Drone COFDM Transmitter With Multipath Resistance And Channel Coding For NLOS Video Transmission
Advanced COFDM transmitter designed for reliable non-line-of-sight video transmission in drone applications with military-grade encryption and high-speed mobile capabilities.
Key Features
- COFDM modulation technology with multipath resistance and robustness
- Low latency H265/H264 video encoding supporting up to 1080P/I @60fps
- Military-grade AES256 encryption for secure communications
- Supports high-speed mobile transmission up to 800km/h
- Ideal for NLOS digital video wireless transmission
- Real-time video capture and encoding capabilities
Product Overview
The HC-T820 drone COFDM transmitter integrates H.265/H.264 encoder board, COFDM modulator and RF power amplifier. It supports AV/HDMI/SDI/AHD video input. With compact dimensions (104.5*50*27mm) and lightweight design (140g), it is suitable for long-range NLOS video mobile transmission applications.
Technical Specifications
Interface Specifications
| Interface |
Details |
| HD video input |
Standard HDMI interface |
| SD video input |
4PIN 1.5mm pitch connector (CVBS Analog Audio Video Input) |
| Data transmission |
3PIN 1.5mm pitch connector (default TTL3.3V, RS232 optional) |
| Configuration port |
4PIN 1.5mm pitch connector, TTL3.3V for Parameter Configure Board or PC connection |
| Power input |
XT30PW-M connector (12V Power Supply) |
| Antenna port |
SMA male connector |
COFDM Wireless Modulation Transmission
| Parameter |
Specification |
| Product name |
Drone COFDM Transmitter With Multipath Resistance And Channel Coding For NLOS Video Transmission |
| Model number |
HCT820 |
| Wireless modulation |
COFDM |
| IFFT mode |
2K |
| Wireless bandwidth |
1MHz~8MHz adjustable (1KHz step) |
| FEC options |
1/2, 2/3, 3/4, 5/6, 7/8 |
| Guard interval |
1/32, 1/16, 1/8, 1/4 |
| Constellation |
QPSK, 16QAM, 64QAM |
| Wireless code stream |
0.5Mbps to 31.67Mbps |
| Frequency range |
300~860MHz (customizable with 1KHz step) |
| Transmission power |
1W (30dBm) or 2.5W (34dBm) standard (10W/20W optional) |
Audio and Video Processing
| Parameter |
Specification |
| Video input |
Single-channel HD/SD (auto-detected, HDMI preferred) or optional dual input |
| Supported formats |
1080@60P/50P/30P/25P/24P/60I/50I/30I, 720@60P/50P/30P, 720*480 60I (NTSC), 720*576 50I (PAL) |
| Video encoding |
H265/H264 |
| Audio input |
HDMI embedded or analog |
| Audio format |
AAC, 16bit, stereo, 32Kbps |
| Encryption |
AES256 |
| Dimensions |
104.5*50*27mm (excluding connectors) |
| Weight |
<140g |
| Power consumption |
1W PA: <15W, 2.5W PA: <23W (12V DC, 11~13V) |
| Latency |
H265: 200~300ms; H264: 50~130ms |
Drone COFDM Transmitter Interface
Frequently Asked Questions
Does your drone COFDM transmitter support changing frequency?
The transmitter frequency can be 160MHz~2700MHz, but our COFDM wireless receiver only supports 170~860MHz. You can specify a center frequency point, then our RF power amplifier will normally be made to operate within a frequency range of center frequency ±15MHz. For frequencies 860MHz~2700MHz, a frequency down converter is required at the receiver end.
Does this drone COFDM transmitter support SDI video input?
Yes, our COFDM transmitter supports HDMI, SDI, CVBS AV, IP Ethernet RJ45 and AHD video input. Please specify your preferred input when ordering.
What's the max distance for the COFDM transmitter with 2.5W PA power amplifier?
For UAV/Drone applications, the LOS transmission range is about 50km when the UAV is at approximately 300 meters altitude, with receiver antennas installed as high as possible.
Does your VTX and RX support standard DVB-T protocol?
Yes, it supports three working modes: 1. Standard DVB-T protocol (no encryption) 2. COFDM protocol with encryption/decryption (H265/H264) 3. COFDM low latency protocol (H264 with encryption/decryption)
Can the COFDM transmitter handle simultaneous HDMI video and audio transmission?
Our wireless COFDM transmitter supports one HDMI and one auxiliary CVBS audio/video input simultaneously. Currently, it supports one sound source (selectable between HDMI or CVBS via parameter configuration board).
About Hincn Limited
Hincn Limited is a Hong Kong company specializing in HD video wireless transmission solutions, founded in 2018. Our research and production center is located in Shenzhen and was established in 2015. We have a total of 9 employees, including 3 programmers and 2 engineers. Our company maintains long-term cooperative relationships with ADI, Xilinx, Altera and Morningcore. We are the third-party design partner for both ADI and Morningcore.
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