lien de données radio UAV à faible coût

lien de données radio UAV à faible coût

1. introduction

The digital data link modules are used for the communication between UAVs and the ground station (GS) to send data and receive commands. The two-way radio link must have high reliability and always be connected during the flight. Link module on UAV side must have a low price due to limitation on UAV total cost in mass production.

The main feature of this data link is the low rate of sending and receiving data to reduce the occupied bandwidth and subsequently increase the sensitivity of modules.

Remarques 1: The GS module must be capable of communicating with 12 UAVs simultaneously.

2. Spécifications techniques

Paramètres	Valeur
Maximum Operating Range	25km
Operating Height	10-5000m
Max UAVs Speed	100MS
Bande de fréquence	UHF (upper 400MHz)
Frequency Channel Selection	Oui
Saut de fréquence	Optionnel (est préféré)
UAV module Transmit Power	2W
GS module Transmit Power	10W
Débit de données	See the below figures (software selectable in range of 1kbps to 500kbps)
Packet transmission delay	≤ 5 milliseconde
Détection d'erreur	CRC
Channel Coding (FEC)	Oui
Le chiffrement	Oui
Senstivity	−122dBm@20kbps −199dBm@40kbps −111dBm@230kbps −108dBm@500kbps
MIMO Antenna	Optionnel
Mode de fonctionnement	Point à point (GS to one UAV) Point to MultiPoint (GS to maximum 12 UAVs on air, simultanément)
Receive satuation power	10dBm
No damage receiver power	20dBm
Temps de démarrage	Less than 2sec
Operationg time	Maximum 30 minutes continuously
Working tempearure	−20°𝐶 ~ + 60°𝐶

Three working modes for this digital data link can be considered, which are described in the following figures. According to the complexity and the cost of link module (specially on UAV side), each topology can be selected.

3. Type de réseau

1- The working frequency of all uplinks and downlinks are different (the nodes work in different channels). 

2- The frequency of uplink and downlink for each node is the same but is different with other nodes.

3- The working frequency of all nodes is same as other nodes and GS is managing the nodes to avoid data loss and interference.

Remarques 2: In all the above three topologies, frequency hopping is a great advantage but is not a critical feature.

4. Electrical and Interface

Paramètres	Valeur
UAV Installed Module
Tension d'entrée	9~18V
Port série	1, RS422
Débit en bauds série	9600~460800bps,
Connecteur d'antenne	Lycée
Interface Connector	J30J or DB type
Poids	Less than 150g
Taille (LxlxH)	8 × 8 × 3 cm
GS Installed Module
Tension d'entrée	9~18V
Serail Port	1, RS422
Serial Buad Rate	9600~460800bps,
Ethernet	RJ-45, 100mbps
Connecteur d'antenne	N-Type
Interface Connector	J30J or DB type
Poids	Less than 500g
Taille (LxlxH)	15 × 10 × 4 cm

Our low-cost UAV Radio Data Link does not has ethernet port, only serial port. The antenna connector is not N-Type, but SMA-Type. veuillez vérifier le lien ci-dessous.