Real-time image/video transmission solution for unmanned aerial vehicle (UAV)

What is UAV? Mini drone aircraft?

  An unmanned aerial vehicle (UAV), commonly known as a drone, as an unmanned aircraft system (UAS), or by several other names, is an aircraft without a human pilot aboard. The flight of UAVs may operate with various degrees of autonomy: either under remote control by a human operator, or fully or intermittently autonomously, by onboard computers.

A UAV for commercial and recreational aerial photography

A UAV for commercial and recreational aerial photography

  Compared to manned aircraft, UAVs are often preferred for missions that are too “dull, dirty or dangerous” for humans. They originated mostly in military applications, although their use is expanding in commercial, scientific, recreational and other applications, such as policing and surveillance, aerial photography, agriculture and drone racing. Civilian drones now vastly outnumber military drones, with estimates of over a million sold by 2015.

Mini encodulator (Encoder & Frequency Modulator) transmitter for mini drone aircraft

FOT E2E mini encodulator transmitter solution

FOT E2E mini encodulator transmitter solution

  Fiber Optic Telecom FOT end to end mini encodulator+transmitter solution is a set of real-time image transmission system which is specially designed for working with mini drone aircraft. It integrates encoder, modulator, transmitter and antenna. It converts the real-time signal from the mini camera into RF and send back to ground wirelessly. The returned signal will be received by the accessory STB and displayed on TV screen.

Main Features

  • Support standard HDMI wireless transmission, support up to 1080P resolution
  • Frequency & Transmission distance:
    300MHz-900MHz can reach 3-5km; 900MHz-2400MHz can reach 1-3 km.
    300MHz-860MHz can reach 5-10km; 860MHz-2400MHz can reach 1-3 km. ( for drone aircraft)
  • Receiving frequency range: 300MHz-862MHz
  • Transmission delay 300-350ms
  • H.264 encoding format, high quality encoding
  • Channel selectivity and channel spurious suppression characteristics
  • Excellent receiving sensitivity, stable image transmission at high speed above 230km/hours

Principle Chart

FOT mini encodulator transmitter principle chart

FOT mini encodulator transmitter principle chart

Technical Specifications:

  Transmitter’s detail technical parameter:

 InterfaceHDMI input 
1920x1080_60P, 1920x1080_50P
Resolution1920x1080_60i, 1920x1080_50i
1280x720_60P,1280x720_50P
720x576_50i, 720x480_60i
VideoVideo FormatPAL/NTSC
Encoding FormatMPEG-4 AVC/H.264
Bitrate0.8Mbps~30Mbps
Rate ControlCBR
GOP StructureIPPP
Encoding FormatMPEG-1 Layer2
Sampling Rate48KHz
AudioResolution24-bit
Bite rate64Kbps-192Kbps
RF frequency300~1500MHz, 10 KHz step
RF Output and Power300MHz-860MHz, ≤1W
860MHz-1500MHz, ≤500mw
RF InterfaceRF output (RPSMA )
Modulation modeCOFDM DVB-T
Bandwidth6M,7M,8M
Transmission Rate1-8Mbps
Code Rate1/2, 2/3, 3/4, 5/6, 7/8
Guard Interval1/32, 1/16, 1/8, 1/4
ConstellationQPSK, 16QAM, 64QAM
Transmission Mode2K 8K
MER≤25dB
Transmission Delay300MS-350MS
Antenna interface and impedanceRPSMA male, MMCX female , impedance 50Ω
Operating VoltageDC 24V/DC 12V
Temperature-10 ℃ ~+50 ℃ (Operating); -20 ℃ ~75 ℃ (Storage)
Transmission Distance300MHz-860MHz, 5-10km
860MHz-1500MHz, 1-3km
Weight≤110g (antenna and cables are exclusive)
DimensionEncodulator46(L)*40(W)*24mm(H)
Amplifier68(L)*43(W)*20mm(H)
FOT mini encodulator transmitter in Drone aircraft application

FOT mini encodulator transmitter in Drone aircraft application

  Receiving Box’s detail technical parameter:

Model NOReceiving Box 
RF frequency300MHz-862MHz
Input Impedance75Ω
Signal Level-80dBm~-10dBm
Channel Band Width6M/7M/8M
ConstellationQPSK, 16QAM, 64QAM
Guard Interval1/32, 1/16, 1/8, 1/4
FEC1/2, 2/3, 3/4, 5/6, 7/8
Carrier Mode2K 8K
Transport StreamMPEG-4AVC/H.264HP@L4 MPEG-2 MP@HL/ML
Video Aspect Ratio4:3/16:9
Video SystemPAL/NTSC
Video Output1±0.3Vpp
Video ResolutionHDMI720*576@25fps/720*480@30fps/HD
CVBS720x576_50i
Audio DecoderMPEG-2/HE_AAC(DD/DD +optional)
Audio OutputR/L/ST
A/V Output interfaceVideo RCA Jack×1,Audiop RCA Jack(R/L) ×2
Upgrade and Multimedia PortUSB
Power Consumption≤4.5W
Power SupplyDC+12V~24V±10%
Operating Temperature-10 ℃ ~+50 ℃
Dimension115*77*27mm

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