IP mesh ad hoc transceiver OFDM Transmitter and receiver Wireless Video Data Transmission for UAV Drone IP camera

IP 网状自组织收发器 OFDM 发射器接收器用于无人机 IP 摄像机的无线视频数据传输

Installed on the Drone

产品概述

This system adopts a new type of sub-broadband “无线网络” 基于点对点, 点对多点, and AD-Hoc networking. As a mobile center organization network, Vcan1401 is a central, 分布式, 多跳中继, 动态路由, 刀枪不入, and good scalability wireless broadband system. It uses its own routing protocol internally. Jump forwarding completes wireless communication between nodes. 一种具有高效MAC层传输协议和两层路由协议的自组织分布式宽带无线网络传输系统. 具有优异的次宽带性能, strong anti-interference ability of system technology, 高频谱效率, 传输距离长, 抗褪色能力, 和较强的衍射能力. 可在复杂、非视距环境下实现实时、高质量的无线双向数据传输功能.

Facing the information communication transmission of drones, 机器人, 以及复杂环境下的无人船平台, we follow the design principles of generalization, modularization, and standardization to realize high-speed real-time transmission of telemetry, 遥控, and payload data from ground control stations to unmanned terminals on the water surface As well as the information collaborative interaction function between unmanned terminals, the system works continuously, stably and reliably for a long time.

Technical Feature

• 中心站开启后, there is no need for complicated system configuration. After the on-site power-on, 它会自动形成一个网络, 并且通信可以开始于 “秒”;
• 任意拓扑, 多跳中继, 中继转发;
• 各个节点的逻辑属性可灵活配置;
• 现在, the same frequency network can support the interconnection of 1024 节点;
• 通道使用 AES 加密;
• The system data bandwidth peak value is 32Mbps;

Hardware description

1. 1) Adopt domestic self-organized intellectual property technology, private network, private communication transmission protocol, and unique synchronization code.
2. AES 128位加密技术: After the information data is encrypted by AES, 无法获取加密前的信息;
3. OFDM pilot and data position scrambling code encryption: The number of OFDM subcarriers is kept secret, the number of pilots is kept secret, and the position of the pilot is kept secret, making it impossible to obtain pilot information for channel estimation and frequency domain equalization; the change method of pilot and data position is encrypted In this way, illegal users cannot correctly distinguish pilot frequency and data.
4. LDPC code word structure encryption: LDPC code word structure includes code length, information bit, and check bit; the position changes of information bit and check bit are encrypted, and illegal users cannot correctly distinguish between information bit and check bit.
5. Using multiple encryption methods and modular design;
6. Centralized and distributed, all nodes are equal in status, and can self-organize a network under complex conditions such as shielding non-line-of-sight (NLOS) and high-speed movement, and realize TDD two-way communication;
7. Support any network topology such as point-to-point, 链, 星星, ETC。, and can realize real-time interaction of multi-channel IP-based sub-broadband data, multi-serial port data, and other multimedia information;
8. 多跳中继, 每个节点都可以随机快速移动, and the route can be dynamically reconfigured when the system topology changes rapidly;
9. 便捷部署, 灵活运用, 操作简单, 维护方便, and all-IP design (支持各种数据透明传输) make it easy to realize the interconnection of heterogeneous systems, especially suitable for wireless coverage transmission and wireless narrowband data networking;

技术参数

• 通讯频率: 1415~1465MHz (3G\2.4G), 可调节的;
• 发射功率: 2*30分贝 (2*1W¯¯), 1dBm 步进可调;
• 带宽模式: 4 / 8 兆赫;
• 调制方式: 多载波TDD-COFDM;
• 载波调制: BPSK/QPSK/16QAM/64QAM (自适应或固定);
• 接收灵敏度: -110dBm @ 1MHz;
• 传输延迟: about 2ms for a single hop;
• 启动时间: 点对点, point-to-multipoint≤5S (AD-Hoc start-up time 25S);
• 网络访问时间: 少于 1 第二;
• 路由切换: 少于 1 第二;
• 数据接口: 网络端口x 2, RS232x 2;
• Battery power supply: 12电压/1A;
• 整机功耗: 6~12W, standby 6W, receiving 8W, full load sending 12W;
• 工作温度: -40～+70℃;
• 尺寸: 长度: 73mm*width 47mm*height 10mm;
• 重量: 60G

Data Chart

调制	1MHz Bandwidth (Mbps)	2兆赫 带宽 (Mbps)	4兆赫 带宽 (Mbps)	8兆赫 带宽 (Mbps)
BPSK 1/2	0.38	0.7	1.25	2.15
QPSK 1/2	0.9	1.6	2.6	4.5
QPSK 3/4	1.6	2.7	4	7.1
16QAM 1/2	1.8	3.1	5.3	9.5
16QAM 3/4	2.2	3.9	8	14.2
64QAM 2/3	2.8	5.2	10.6	19.5
64QAM 3/4	3.8	6.4	12	21.5
64QAM 5/6	4.2	7.8	13.5	24

常问问题 more

Q: Why does the radio transceiver seem to power on in seconds and power off always restart?

一个: Please check the power supply, for the 2×5-watt PA inside, the power supply should be 16-26V at 4.5A. Maybe the power supply is not enough, then always restart. (2×1-watt or 2×2-watt need 12-18V)

Q: Why can’t I connect the transceiver radio device via web cable or get a ping feedback?

一个: The default IP address of the two-way radio transceiver is 192.168.17.1.

Please make sure that the IPV4 address of your computer is the same net segment, 例如, 192.168.17.xxx.

Please set the default gateway of the IPV4 address is 192.168.17.1.

Q: Does your mesh two-way transceiver module support changing the frequency (渠道) via the UART AT command?

一个: 是, please type the below commands at the serial port tool.

AT-API+ set
wlan.radios.0.name phy0
wlan.radios.0.txpower 30 （power amplifier, 30 means 2-watts）
wlan.radios.0.带宽 10 （frequency bandwidth）
wlan.radios.0.渠道 2 （channel）
END-AT-API

(The numbers 30, 10, 和 2 of the above command should change to what you want the number. )

Q: Does the radio support frequency hopping/ changing dynamically?

一个: We have many models that support the frequency hopping function (该型号专为具有双向无线数据链路的视频和数据无线传输而设计). The cost is different.
The model you bought does not support frequency hopping. You can choose the frequency from the below picture. (Choose from the web page or AT commands)

Mesh Radio Transceiver Support Channel Frequency range

Q: Can I modify the less transmission power?

一个: 当然. When you are testing the sample on the function except for the real transmission range, it is better to change the less transmission power in the lab.

20毫瓦为13dBm
200毫瓦为23dBm
1 瓦数为 30dBm
2 瓦数为 33dBm
5 瓦数为 37dBm
10 瓦特为 40dBm
20 瓦特为 43dBm
50 瓦特为 47dBm
100 瓦特为 50dBm

Q: Can the web interface contain only the English language?

Now it supports English and Chinese.

Q: How many nodes the mesh architecture can support?

一个: Supports up to 32-node networking. Too many nodes will cause high system overhead and the network will be very unstable. 一般来说, a dozen nodes are recommended.

Q: Is the relay function available in this modem? if yes then how many hops possible?

一个: Support relay function. 最大限度 5 hops in the one line.

Q: Can we decrease the data rate to increase the range?

一个: 是.

Q: Does the frequency band support 2280 兆赫至 2380 兆赫?

一个: The frequency band can not meet your demand now. Only 2310-2380Mhz is available.

Q: What about the encryption? Do you provide by default encryption details?

Q: Please show us the drawing for hole positions and size of the 2×1-watt PA model.

Q: At this mesh IP radio, the new unit will be auto-joining my networking, how can we set authorization and protect our privacy?

一个: If you have three or four robots, those who walk in the middle will serve as relays or repeaters for those who walk in the front. If you have three or four units, they can be auto-forming networking, so setting passwords is very important.
请检查下面的图片.

Q: How can I update the firmware of your two-way IP radio?

Here is an example firmware of 20240415. Please contact us for the latest update firmware if you need it.

https://drive.google.com/file/d/1OcGiQ3gdaxTvjX3bpS2yJWzn4nNecq-S/view?usp=drive_link

Q: Why my IP transceivers have stopped talking to each other?

 

Why did our IP transceivers stop talking to each other? The UI says Mesh Network is broken. We cannot ping any Radio, we can not see any transmissions using the Spectrum Analyzer when we ping.

一个: The parameter configuration should be messed up. What’s the situation with the wireless part? Is it convenient to take a screenshot? The easiest way is to restore the factory settings (after restoration, the IP address is: 102.168.17.1)

下载

Vcan1401 mesh version serial port AT setting routine description.pdf