Link de dados de rádio UAV de baixo custo

Índice

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.

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

2. Technical specifications

Parâmetros	Valor
Maximum Operating Range	25km
Operating Height	10-5000eu
Max UAVs Speed	100EM
Banda de frequência	UHF (upper 400MHz)
Frequency Channel Selection	Sim
Salto de frequência	Opcional (é preferido)
UAV module Transmit Power	2W
GS module Transmit Power	10W
Taxa de dados	See the below figures (software selectable in range of 1kbps to 500kbps)
Packet transmission delay	≤ 5 milissegundo
Detecção de erro	CDC
Channel Coding (FEC)	Sim
Encryption	Sim
Senstivity	−122dBm@20kbps −199dBm@40kbps −111dBm@230kbps −108dBm@500kbps
MIMO Antenna	Opcional
Modo de operação	Ponto a ponto (GS to one UAV) Point to MultiPoint (GS to maximum 12 UAVs on air, simultaneamente)
Receive satuation power	10dBm
No damage receiver power	20dBm
Tempo de inicialização	Less than 2sec
Operationg time	Máximo 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. Tipo de rede

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.

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

4. Electrical and Interface

Parâmetros	Valor
UAV Installed Module
Tensão de entrada	9~18V
Porta serial	1, RS422
Taxa de transmissão serial	9600~460800bps,
Conector de antena	grau
Interface Connector	J30J or DB type
Weight	Less than 150g
Tamanho (CxLxA)	8 × 8 × 3 cm
GS Installed Module
Tensão de entrada	9~18V
Serail Port	1, RS422
Serial Buad Rate	9600~460800bps,
Ethernet	RJ-45, 100Mbps
Conector de antena	N-Type
Interface Connector	J30J or DB type
Weight	Less than 500g
Tamanho (CxLxA)	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. por favor verifique o link abaixo.