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

one，product description

This system uses a new type of broadband "wireless mesh network" based on mesh networking。MP-D Link as a mobile ad hoc network，It does not depend on the existing network infrastructure，Support any network topology,Different from traditional wireless networks，It is a centerless、distributed、Multi-hop relay、Dynamic routing、Wireless broadband system with strong survivability and good scalability，Internal use of its own routing protocol, Internal use of its own routing protocol。Internal use of its own routing protocol。Internal use of its own routing protocol，Internal use of its own routing protocol，Internal use of its own routing protocol，Internal use of its own routing protocol，Possess excellent broadband performance，Support additional video encoding、Real-time transmission of multimedia information such as audio coding。System technology has strong anti-interference ability、High spectral efficiency、Long transmission distance、Anti-fading ability、Advantages such as strong diffraction ability。Can be complex、Real time in non-line-of-sight environment、High-quality wireless two-way data transmission function。

Facing drones in complex environments、robot、Unmanned boat、Emergency Individual、On-board platform information communication transmission，We follow generalization、Modular、Standardized design principles，Realize remote measurement of unmanned terminals on various water surfaces by ground control stations、remote control、High-speed real-time transmission of payload data and information collaboration and interaction function between unmanned terminals，System in continuous long time、stability、Reliable work。

two，Technical characteristics

*No need to set up a central station and complex system configuration, automatic networking after on-site startup，"Second level" to start communication ；

* Arbitrary topology、Multi-hop relay、Relay forwarding ；

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

* At present, the same frequency network can support the interconnection of 32 nodes ；

* The channel uses AES encryption；

* System data bandwidth peak is 90Mbps；

three，Hardware description

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

★AES 128-bit encryption technology：After the information data is encrypted by AES，Make it impossible to obtain information before encryption；

★OFDM pilot frequency and data location scrambling code encryption：The number of OFDM subcarriers is kept secret、Number of pilots kept secret、Pilot position confidentiality，Make it impossible to obtain pilot information for channel estimation and frequency domain equalization；The pilot frequency and data position change method adopts encryption method，Illegal users cannot distinguish pilot and data correctly。

★LDPC code word structure encryption：LDPC codeword structure including code length、Information bit and parity bit；The position change of the information bit and check bit is encrypted，Illegal users cannot distinguish the information bit from the check bit correctly。

2) Using multiple encryption methods，Modular design；

3) Wireless Mesh Network"；No center、distributed，All nodes are equal，Can be used to cover non-line-of-sight (NLOS)、Under complex conditions such as high-speed movement，Self-organized network，Realize TDD transceiver two-way communication；

4) Support point-to-point、Chain、Star、Any network topology such as mesh and hybrid，Can realize multi-channel IP-based clear voice、Broadband data、Real-time interaction of multimedia information such as high-definition video；

5) Co-frequency sensing networking (in perfection)、Multi-hop relay，Each node can move randomly and quickly，When the system topology changes rapidly, the routing can be dynamically reconstructed accordingly；

6) Easy to deploy、Flexible to use、easy to use、Easy to maintain，And the all-IP design (supporting various data transparent transmission) is easy to realize the interconnection and intercommunication of heterogeneous systems，Especially suitable for wireless coverage transmission、Wireless video surveillance；

Four、 Equipment technical parameters

1) Technical advantages

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

Receiving sensitivity can reach -98dBm，Module 1W transmit power (5W/10W/20W/50W power and shape can be customized)，Ground-to-air/air-to-air line-of-sight communication can reach 14km (100 meters in height difference between sending and receiving)，Ground-to-ground line-of-sight communication can reach 1.2 km (both transmitting and receiving heights are 2 meters)，It also has better anti-multipath interference and strong diffraction ability under non-line-of-sight environmental conditions；

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

Ensemble technology，Peak rate up to 90Mbps，Suitable for multi-hop transmission of larger traffic；

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

Applicability of strong network applications；

2)Features

• Software Architecture：Centerless based on IP system、Distributed Wireless Ad Hoc Network；
• Anti-multipath interference：TDD-COFDM multi-carrier modulation has strong anti-multipath interference；
• Diffraction ability：Has strong diffraction and penetrating power；
• Dynamic routing：Layer 2 Intelligent Routing Protocol；
• flexibility：Strong scalability，Nodes can dynamically join and exit；
• Mobility：The maximum moving speed of the tested node is ≥200 km/h；
• Self-healing：Individual terminal damage will not affect the normal operation of the network，Has a strong ability to resist destruction；
• Operating mode：Star network、Mesh network、Chain net、peer to peer，Point-to-multipoint，Multipoint to multipoint；
• IP transparent transmission：Support network port ~ network port、Network port~Serial port、IP transparent transmission from serial port to serial port；
• Internet expansion：Effectively extend Internet coverage，Any terminal in the network can be used as a gateway，Each node of the ad hoc network can access the Internet through the gateway node；
• Spectrum sweep：With spectrum scanning function，View current spectrum usage，Indicates interference；
• Configuration management：Channels available to the radio、bandwidth、power、rate、IP，Key and other parameters to be set；
• Status Display：Dynamically display network topology、Link quality、Signal strength、Environmental noise, etc.；

5.1 Drone、Robot module

• Communication frequency：1415~1465MHz，1MHz step adjustable；
• Transmit power：2*30dBm（2*1W），1dBm step adjustable；
• Bandwidth mode：5 / 10 / 20 /40MHz；
• Modulation：Multi-carrier TDD-COFDM；
• Carrier modulation：BPSK/QPSK/16QAM/64QAM (adaptive or fixed)；
• Receiving sensitivity：-98dBm @ 10MHz；
• Communication distance：30km (ground-to-air/air-to-air line of sight)，10km (ground-to-ground line of sight)；
• Communication rate：Peak 90Mbps (adaptive)；
• Transmission delay：Single jump about 2ms；
• Multi-hop ability：Video up to 8 jumps；
• Start Time：≤25S；
• Access time：Less than 1 second；
• Routing switch：Less than 1 second；
• Data interface：Network port x 2，RS232 x 2；
• Battery powered：12V / 1；
• Whole machine power consumption：6~12W，Standby 6W，Receive 8W，Send 12W at full load；
• Protection level：IP65；
• Operating temperature：-40~+70℃；
• size：long：73mm*width 47mm*height 10mm；
• weight：60g