MESH bidirectional network transmission system

自组网双向网络传输系统

主要特点：
采用 TDD-COFDM图传 传输协议， 距离远，数据量大，可以自由组网，坚固耐用。
采用宽温元器件， 零下40度到85度均可正常工作
IP67级防护，可长时间在户外恶劣环境下使用。
相对比普通网桥，距离是普通WIFI传输协议的10倍。
多电源冗余设计，可靠性高。
专门针对视频流优化。

主要用途： 配合摄像机，远距离传输图像。
安防监控： 比如农业监控，工业监控，厂库监控，水上监控，森林防火，山区监控等。
物联网： 自组网数据传输。
无人机： 图像，数据传输。
特殊行业： 电站，水利等
公安武警消防： 可定制微型化图像传输。比如多台自组网密拍机。

使用方法： 配合监控使用

点对点, 点对多点，无中心组网 MESH

采用特殊算法，最优化距离方案， 整体性能最优

摄像机可选用成熟的海康，大华等厂家， 网口与设备直接连接即可使用。
后台可选配海康，大华等成熟的NVR ，实现一体化监控解决方案：

设备外观:接头均使用防水航空插头和接头插入视图:

背面大面积散热片,多个螺孔方便安装到各个场合:

尺寸:180 X 180 X 50 mm
重量: 2kg

接口

1. 天线A 和 天线B 为一组， 天线C 和 天线D 为一组
   这两组相互独立, 可配置不同频率, 比如A,B 为 2430. C,D为 2470. 这样可以提供更大容量. (默认标配A,B 组. C,D组需要订制)
2. NET网口可48V POE 供电. 默认1236为数据, 45+, 78-, 其它标准可以定制.
3. DC口, 默认配置DC 12V 2A 输入. （该端口可提供2组或4组RS232串口信号, 也可提供网口信号, 信号强度信号等. 可选LEMO 1B系列或0K防水系列航空插头, 1B最大16芯, 0K最大9芯. 需要请联系订制）

无人机版发射机:

具有体积小, 重量轻, 距离远, 全向玻璃钢天线可达到30KM. 定向天线可达50KM
同时具有2路双向RS232串口, 方便将数据上下传.
可选配低延迟编码解码器, HDMI 接口和 SDI 接口, 最低延时可到20ms
20ms 不包括显示器和摄像机. 1080P 60 大约80ms

具体参数：
频率: 2.4Ghz
射频功率: 27dBm
双天线 MIMO
支持点对点, 点对多点, MESH, 中继 等各种模式
支持2路串口通道
支持4路网口通道
温度: -40~85 度
电源: DC:7V—18V, POE:48V
单频率最大发射功耗约18W, 最大接收功耗约3W
带宽: 1M—8M （最大可扩展到40M）
最高灵敏度: -108dbM (QPSK , FEC:1/2 BW:1M MIMO:ON)
调制方式: BPSK QPSK 16QAM 64QAM
延迟: 端到端 2ms
支持AES 加密 支持LDPC校验
最大传输速率: 30Mbps （最大可扩展到300Mbps）
空对地有效距离: 全向天线30KM，定向天线50KM

批量可提供内部核心主板. 需要其它功能可以订制.

MESH Bidirectional Network Transmission System

The MESH bidirectional network transmission system is an advanced wireless communication solution designed for long-distance, high-speed, and reliable data transmission in both line-of-sight (LOS) and non-line-of-sight (NLOS) environments. This self-organizing network system leverages TDD-COFDM (Time Division Duplex – Coded Orthogonal Frequency Division Multiplexing) transfer protocol, providing superior performance in complex and challenging environments. Its design emphasizes robustness, flexibility, and scalability, making it suitable for professional UAV, UGV, USV operations, industrial monitoring, and security applications.

Main Features

1. TDD-COFDM Transfer Protocol – The system adopts a TDD-COFDM protocol, which allows simultaneous bidirectional communication with strong resilience to multipath interference, fading, and signal obstruction. This enables stable video and data transmission even in urban or heavily forested areas.
2. Long-Distance Video Transmission – Designed to transmit images and video over long distances, the system supports distances of up to 1.5 km NLOS (non-light-of-sight) and up to 30 km LOS. This ensures real-time monitoring for applications such as drones, industrial facilities, security, and emergency response operations.
3. Mesh Networking Capability – The system supports peer-to-peer and point-to-multipoint communication, forming a dynamic, self-organizing MESH network. Each device functions as a node that can relay signals to extend coverage and maintain connectivity in areas where direct communication is impossible.
4. Flexible Network Architecture – The MESH system allows automatic networking with minimal configuration. Nodes can be added or removed without affecting the overall performance, providing highly adaptable network coverage suitable for mobile platforms such as drones, vehicles, and portable monitoring stations.
5. Web-Based Device Management – A web device management UI allows operators to view, modify, and configure wireless video and data links for UAV IP cameras and other networked devices. Parameters such as frequency, bandwidth, and encryption can be adjusted remotely, providing high operational flexibility.
6. Integrated Video and Data Transmission – The system can transmit HD video, audio, and telemetry data over a single wireless link. It supports HDMI, SDI, and IP camera inputs, with downlink video delivered in real-time to the receiver while simultaneously transmitting uplink control commands, telemetry, or sensor data.
7. Dual RS232 Ports – Each module features two bidirectional RS232 serial ports, allowing seamless integration with existing control systems, PTZ cameras, telemetry equipment, and other serial-based devices.
8. Durable and Weatherproof Design – The system uses waterproof aviation connectors, IP67-rated housing, and wide-temperature components, ensuring continuous operation in harsh environments ranging from -40°C to +85°C. This makes it suitable for outdoor deployments, industrial monitoring, or mobile operations on UAVs, UGVs, and USVs.
9. Lightweight and Compact – Each node measures approximately 180 x 180 x 50 mm and weighs around 2 kg, making it lightweight and easy to integrate into vehicles, drones, or hand-held systems. Despite its compact form factor, it delivers high-performance transmission comparable to larger traditional solutions.
10. High-Speed Automotive Compatibility – Specially optimized for high-speed vehicles, the system maintains stable reception and video quality even when traveling above 160 km/h, ideal for on-road or in-vehicle monitoring.
11. Flexible Frequency and Output Power – The system operates at 2.4 GHz, with an output power of up to 27 dBm, providing strong signal coverage and reliable connectivity across multiple nodes. Bandwidth and modulation schemes, including QPSK with FEC coding, are configurable to match environmental conditions and application requirements.
12. Low Latency – The system maintains ultra-low latency transmission, ensuring real-time video and data flow for UAV control, security monitoring, or live-streaming applications. Latency is optimized even when multiple nodes relay signals within the mesh network.
13. Energy-Efficient Design – Despite its high performance, the maximum power consumption of the receiver is only about 3W, making it suitable for battery-operated mobile deployments or long-term field monitoring.
14. Versatile Applications – The MESH bidirectional network transmission system is suitable for a wide range of industries and scenarios:

• Drone/UAV Operations: Real-time video, telemetry, and control transmission.
• Unmanned Ground and Surface Vehicles (UGV/USV): Reliable long-range communication for exploration, monitoring, or surveillance.
• Industrial and Security Monitoring: Transmission of images from remote or hazardous locations such as factories, warehouses, and forested areas.
• Public Safety and Emergency Response: Enables mobile teams to transmit high-definition video and telemetry data during disaster management or firefighting.
• Internet of Things (IoT) and Smart Infrastructure: Self-organizing network for sensor data and IP camera integration in agriculture, water management, and energy sectors.

15. Demo Videos and Proven Performance – The system has been tested in various scenarios:

• 1.5 km NLOS demonstration indoors and on roads using COFDM-912T.
• UAV to ground video transmission over 65 km using Vcan1702 modules.
• Live HDMI streaming from handheld or vehicle-mounted transmitters.

16. Customizable Standards – The hardware and software of the MESH system can be customized for different applications, including modulation, frequency range, connector type, and data interface, ensuring flexibility for unique project requirements.

In conclusion, the MESH bidirectional network transmission system provides a robust, flexible, and reliable solution for long-distance video and data transmission. Its self-organizing mesh network architecture, bidirectional data ports, IP67 protection, low latency, and wide operating temperature range make it suitable for UAVs, UGVs, USVs, industrial monitoring, security, and other professional applications where high-quality video transmission and network reliability are critical. The system’s combination of COFDM technology, waterproof aviation connectors, and flexible web-based configuration ensures that it can adapt to complex deployment scenarios while maintaining stable, high-quality video and telemetry links.