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 AES256 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
- 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.
Ethernet HDMI Input 4K Video COFDM Wireless Transmitter Module With H265/H264 Low Latency
