Ad hoc network broadband radio IP mesh video data network transmitter transceiver

one，Product overview

This system adopts a new broadband "wireless mesh network" based on mesh networking.。MP-D Link as a mobile ad hoc network，It does not rely on existing network infrastructure，Supports any network topology,Unlike traditional wireless networks，It is a centerless、distributed、multi-hop relay、dynamic routing、Wireless broadband system with strong invulnerability and good scalability，Internally uses its own routing protocol, Complete wireless communication between nodes through wireless multi-hop forwarding。Self-organizing distributed broadband wireless network transmission system with efficient MAC layer transmission protocol and layer 2 routing protocol。All nodes are completely equal，No need for any infrastructure，Quickly build dedicated self-organizing networks between mobile nodes，Provide instant adaptive communication，Excellent broadband performance，Supports additional video encoding、Real-time transmission of multimedia information such as audio encoding。System technology has strong anti-interference ability、High spectral efficiency、Long transmission distance、Fade resistance、Advantages such as strong diffraction ability。capable of complex、Real-time in non-line-of-sight environment、Excellent wireless two-way data transmission function。

For drones in complex environments、robot、unmanned boat、Emergency individual soldier、Vehicle platform information communication transmission，We follow generalization、Modular、Standardized design principles，Realize the telemetry of each unmanned terminal on the water surface from the ground control station、remote control、High-speed real-time transmission of payload data and information collaboration and interaction between unmanned terminals，The system is in continuous operation for a long time、Stablize、Works reliably。

two，Technical features

*There is no need to set up a central station and complex system configuration. The network will be automatically formed after powering on the site.，Communication can be launched in "seconds" ；

* any topology、multi-jump relay、relay forwarding ；

* The logical attributes of each node can be flexibly configured；

* Currently, the same frequency network can support the interconnection of 32 nodes. ；

* The channel is encrypted using AES；

* The peak system data bandwidth is 90Mbps；

three，Hardware description

1) Adopt localized self-organized intellectual property technology，private network，Adopt private communication transmission protocol，Unique synchronization code。

★AES 128-bit encryption technology：After encrypting the information data with AES，Makes it impossible to obtain information before encryption；

★OFDM pilot and data position scrambling encryption：The number of OFDM subcarriers is confidential、The number of pilots is kept secret、Pilot location confidentiality，This makes it impossible to obtain pilot information for channel estimation and frequency domain equalization.；The pilot and data positions are changed in an encrypted manner，Illegal users cannot correctly distinguish between pilot and data。

★LDPC codeword structure encryption：LDPC codeword structure includes code length、Information bits and check digits；The position changes of the information bits and check bits are encrypted.，Illegal users cannot correctly distinguish between information bits and check digits。

2) using a variety of encryption methods，Modular design；

3) Wireless Mesh Network”；No center、distributed，All nodes have equal status，Available in masked non-line-of-sight (NLOS)、Under complex conditions such as high-speed movement，Self-organizing network，Realize TDD transceiver two-way communication；

4) supports peer-to-peer、Chain、star、Any network topology including mesh and hybrid，Can achieve multi-channel clear voice over IP、broadband data、Real-time interaction of multimedia information such as high-definition video；

5) Co-channel sensing networking (under improvement)、multi-hop relay，Each node can move randomly and quickly，Routing can be dynamically reconstructed when system topology changes rapidly；

6)Easy to deploy、Flexible to use、Easy to operate、Easy maintenance，And the all-IP design (supports transparent transmission of various data) makes it easy to realize interconnection and interoperability of heterogeneous systems.，Particularly suitable for wireless coverage transmission、Wireless video surveillance；

Four、 Equipment technical parameters

1)Technical Advantages and Features

• Long transmission distance：Using LDPC channel coding、space-time coding、Transceiver diversity and other technologies，catch

Receiving sensitivity can reach -98dBm，The module transmits at 1W power (5W/10W/20W/50W power and shape can be customized)，Ground-to-air/air-to-air line-of-sight communication can reach 14km (sending and receiving height difference is 100 meters)，Ground-to-ground line-of-sight communication can reach 1.2 km (both sending and receiving heights are 2 meters)，It also has good anti-multipath interference and strong diffraction capabilities under non-line-of-sight environmental conditions.；

• High transmission rate：Adopt BPSK/QPSK/16QAM/64QAM adaptive modulation、receive points

Collection and other technologies，Peak rate up to 90Mbps，Suitable for multi-hop transmission of large business volumes；

• Large network size：Dynamic allocation of channel resources，Actual measurement can support 32 nodes for networking；
• Many relay hops：The measured video relay hop count can reach 8 hops，Expand network coverage，increase

Strong network application applicability；

2) Features

• software architecture：Centerless based on IP system、Distributed wireless self-organizing network；
• Anti-multipath interference：TDD-COFDM multi-carrier modulation has strong anti-multipath interference；
• Diffraction ability：Has strong diffraction and penetration capabilities；
• dynamic routing：Layer 2 intelligent routing protocol；
• flexibility：Strong scalability，Nodes can join and exit dynamically；
• Mobility：The maximum movement rate of the tested nodes is ≥200 kilometers/hour；
• Resistant to damage and self-healing：Damage to individual terminals will not affect the normal operation of the network，Has strong resistance to damage；
• working mode：star network、mesh net、Chain network、peer to peer，point-to-multipoint，multipoint to multipoint；
• IP transparent transmission：Support network port ~ network port、Network port~serial port、Serial port~Serial port IP transparent transmission；
• internet extension：Effectively extend Internet coverage，Any terminal in the network can serve as a gateway，Each node of the ad hoc network can access the Internet through the gateway node；
• spectrum scan：With spectrum scanning function，View current spectrum usage，Indicate interference；
• Configuration management：Available channels for radio stations、bandwidth、power、rate、IP，Key and other parameters to set；
• status display：Can dynamically display network topology、Link quality、signal strength、Environmental noise, etc.；

5.1 drone、Robot Mod

• Communication frequency：1415~1465MHz，1MHz step adjustable；
• Transmit power：2*30dBm（2*1W），1dBm step adjustable；
• bandwidth mode：5 / 10 / 20 /40MHz；
• Modulation method：Multi-carrier TDD-COFDM；
• carrier modulation：BPSK/QPSK/16QAM/64QAM (adaptive or fixed)；
• Receive sensitivity：-98dBm @ 10MHz；
• Communication distance：30km (ground-to-air/air-to-air visual range)，10km (ground-to-ground sight distance)；
• Communication rate：Peak 90Mbps (adaptive)；
• Transmission delay：Single hop about 2ms；
• Multi-jump ability：Video up to 8 hops；
• Start time：≤25S；
• Network access time：less than 1 second；
• Route switching：less than 1 second；
• Data interface：Network port x 2，RS232 x 2；
• battery powered：12V/1A；
• Machine power consumption：6~12W，Standby 6W，Receive 8W，Send 12W at full load；
• Protection level：IP65；
• working temperature：-40~+70℃；
• size：long：73mm*width 47mm*height 10mm；
• weight：60g