JY-103 Back-Pack Wireless Image Transmission System
Fig. 1 Tx and Rx Equipment of Back-Pack Wireless Image Transmission
System
1 General Description
JY-103 back-pack wireless image transmission system adopts advanced
OFDM technique, equipped with advanced encoding and decoding
technique of signal channel, error-controlling and MPGE4 digital
image compression technique, it can realize simultaneous
transmission of broadband multimedia such as video, voice and data
in real time under fast moving environment.
The system is characterized by wide coverage, high sensitivity,
high mobility, strong anti-interference ability, high data-transfer
rate, outstanding stability and reliability, etc., providing ideal
solution to long-distance, high-quality, high-speed, wireless
real-time image transmission for emergency communication such as
emergency command and rescue.
It is suitable for departments such as police, fire fighting,
forces, transportation, customs, electric power supply and finance,
etc.
The system is composed of back-pack equipment and central receiving
equipment. Back-pack equipment is used for encoding, modulating and
radiation of images and voice signal. Central receiving equipment
is used for wireless receiving and decoding of images and voice
signal sent from back-pack equipment.
2 Main Technical Features
- Multiple frequency direct conversion: 150900MHz, 1.0G1.7GHz,
2.3G2.7GHz;
- Multiple bandwidth COFDM modulation technology: 8/3.5/2.5/1.25MHz;
- Multi-mode video compression: MPGE4 compatible with MPEG2;
- High receiving threshold level: -103dBm sensitivity¨10-6 BER
@2.5Mhz signal channel width;
- Advanced encryption: 128-bit AES encryption to avoid illegal
receiving;
- DVD image quality: no mosaic, can reserve last frame complete
image;
- Support Non-Line-of-Sight sight (NLOS) transmission;
- Support transmission at high speed;
- Can change output power by keyboard: 500mW4W, facilitating to
change frequency at site and reduce radiation;
- With 8 frequencies for manual selection: facilitating to change
frequency at site and avoid jamming.
3 Main Performance and Technical Specifications
Time delay of transmission | 5ms/100ms/250ms selectable ¨up to depth of interleaving |
Transmission code rate | 1.530Mbit/s adjustable |
Receiving threshold level | -103dBm Sensitivity (10-6 BER @2.5Mhz signal channel width) |
Transmission distance | 4W Tx power, 35km |
Size of Transmitter | 365×225×45mm (L×W×D) |
Size of Receiver | 430×315×44mm (W×D×H) |
Image format | PAL compound video |
Image quality | D1imagereaching or exceeding DVD effect |
Compression standard | MPEG4 / MPEG2 |
Encoding speed | 120Mbps |
Voice input | Dual channel 12dBm |
Voice encoding | 728kbps stereo |
Video and audio interface | RCA@75imbalance |
Controlling interface | RS232@DB9 socket |
Control | Preset 8 channels on panel for choosing |
Encryption | 128-bit AES encryption mode |
Power supply | DC12V15V (transmitter), AC220V (receiver) |
Power consumption | 40W (transmitter), 15W (receiver) |
Operating temperature | -25°C50°C |
Operating humidity | 80 |
4 Application Diagram
Fig. 2 Single Person Networking
Fig.3 Networking by Vehicular Relay
[2010-06-07]
