One, the main application
(1) the stadia environments. As in the city, and from the mountains, such as indoor and outdoor non-line-of-sight environment, establishing stable effective wireless communication link.
(2) the application of mobile environment. Such as transmitting/receiving device placed in vehicles, ships, machine or individual to carry and mobile platform, overcome the multipath, frequency shift of the factors such as steady image transmission.
(3) the wireless transmission has higher security requirements of the occasion.
Two, the main features
(1) to realize high quality digital image transmission
(2) in the use of fast moving environment
(3) complex environment to realize high quality transmission.
(4) work frequency agile: can choose according to different working environment, the choice of appropriate transmission frequency band.
Three, the main products
(1) car/point COFDM digital image transmission system
The system adopts the standard case, can be installed in a standard on the frame.
(2) COFDM digital image forwarding system
1, analog-digital forward
Receiving front-end analog image signal, then to receive analog image is converted to a digital image through the COFDM digital image transmitting system forward.
2, digital - digital forward
Receiving front-end digital image signal, then receives the image data flow like through the COFDM digital image transmitting system forward. This way repeatedly nondestructive forward.
Four, the main technical target
(1) working frequency band: VHF band, UHF band, L band (optional).
(2) the output power: 1 ~ 5 w.
(3) receiving threshold level: sensitivity - 92 DBM (10-6 BER).
(4) image compression formats: MPEG - 2.
(5) resolution: 720 * 576720 * 480.
(6) modulation mode: COFDM, 2 k (1704 subcarrier), QPSK.
(7) video input: PAL/NTSC.
(8) audio channel: two way.
(9) FEC: 1/2, 2/3, 3/4.
(10) protection interval: 1/32, 1/16, 1/8, 1/4.
(11) power supply: AC 220 v or DC - 12 v.
(12) physical size: portable or 1 u chassis.
(13) working environment: temperature: ℃ ~ forty.
(14) humidity: < 95%, the condensation.
