Kimpok Technology Co., Ltd
Quality COFDM Video Transmitter & Mobile Video Communication factory
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10km LOS HD 1080P COFDM Wireless Video Data Transmitter for FPV Transmission
UAV COFDM HD Video Transmitter:
KP-AHD200MW High cost performance full HD image transmission system equipment specially designed for UAV applications. With advanced COFDM and H.264 technologies at its core, it enables to establish rugged wireless video link under all environments including high-speed mobile. The compact size makes it ideally for UAV installations.
Specification:
| Voltage | DC5V~DC14V |
| Current | ≤0.6A DC12V |
| Video input | CVBS: support HD1080P,720P,576,480; 30FPS |
| Control input | RS232; 19200 |
| Frequency | 300mHz-900mHz (optional) |
| Bandwidth | 2/2.5/4/8MHz(adjustable) |
| Output power | 200mW |
| Data encryption | AES 128bit (user-defined password) |
| Modulation | COFDM |
| Modulated mapping | QPSK(4QAM); 16QAM; 64QAM |
| Bandwidth | 2/4/6/8M (adjustable) |
| FEC | 1/2, 2/3, 3/4, 7/8 |
| Guard Interval | 1/32, 1/16, 1/8, 1/4 |
| Video Compression | H.265/H.264/MPEG-4 |
| Standard Video Format | PAL/NTSC (auto adaptation) |
| Parameter control method | Set the related parameters through the control panel |
| RF Interface | SMA |
| Working temperature | -20℃~75℃ |
| Transmission distance | 1-20km max LOS (on air) |
| Dimension | 42*62*12mm |
| Weight | 30g |
Advantages of COFDM
COFDM modulation has very strong attenuation resistance, COFDM modulation enables the transmission from the end user to a plurality of subcarriers, and the signal can be kept very much longer than the signal kept in a single-carrier system correspondingly, so COFDM has a stronger resistance for impulse noise and fast channel attenuation resistance. COFDM has higher utilization of frequency and allows overlapping orthogonal subcarriers waves as sub-channels, rather than the traditional use of guard bands separating the sub-channels, so it improves the frequency efficiency, and maximizes the use of spectrum resources.
As for high-speed data transmission, COFDM has its self-adaptive modulation mechanism which enables subcarriers to choose different modulation methods like QPSK, QAM, 16QAM or 64QAM according to different channel conditions and background noises. If the conditions are good, then adapt itself to the high-efficiency modulation, if the conditions are bad, then adapt to the anti-interference modulation. So it can reliably adapt to a high-speed data transmission.
It has strong Inter-Symbol Interference (ISI) ability, ISI is the major interference besides noise in digital communications. COFDM by using the cyclic prefix has the strong ability of ISI.
Ease of use in combination with a variety of other methods, COFDM can be used as a modulation method, besides, it can be easily combined with many kinds of multiple access technology, providing access for multiple users at the same time. You can allow multiple users to simultaneously use the COFDM information technology for transmission.
Applications of COFDM Device
COFDM modulation solved the difficult problems of "Non-Line-of-Sight" and "Mobile" wireless broadband transmission when rate is over 2Mbps, so it has been widely applied in mobile communications, video transmission and monitoring systems such as digital audio broadcasting project (DAB), high-definition TV (HDTV) broadcasting, Health Care, Mobile Communication (CDMA + OFDM), wireless LAN (IEEE 802.1la), broadband wireless access (BWA), high-quality videos in real-time monitoring (military, broadcasting, safety, maritime defense and other industries).
High-speed Real-time Mobile Wireless Transmission
The system can collect real-time emergency scene video, voice, data, etc. via a public communication network or private communication network system delivered to each commending center. Officers at all levels of command can understand the situation from the computer directly to take effective measures in real-time command. So it is widely applied to natural disasters emergency services. The system can help to save a lot of processing time and reduce the losses caused by disasters.