Mababang-gastos na link ng data ng radyo ng UAV

Talahanayan ng nilalaman

1. Panimula

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.

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

2. Mga pagtutukoy sa teknikal

Mga Parameter	Halaga
Maximum Operating Range	25km
Operating Height	10-5000m
Max UAVs Speed	100MS
Dalas band	UHF (upper 400MHz)
Frequency Channel Selection	Oo
Dalas ng hopping	Opsiyonal (ay ginustong)
UAV module Transmit Power	2W
GS module Transmit Power	10W
Data rate	See the below figures (software selectable in range of 1kbps to 500kbps)
Packet transmission delay	≤ 5 millisecond
Pagtuklas ng error	CRC
Channel Coding (FEC)	Oo
Pagsasakripta	Oo
Senstivity	−122dBm@20kbps −199dBm@40kbps −111dBm@230kbps −108dBm@500kbps
MIMO Antenna	Opsiyonal
Mga mode ng operasyon	Ituro ang Punto (GS to one UAV) Point to MultiPoint (GS to maximum 12 UAVs on air, sabay sabay)
Receive satuation power	10dBm
No damage receiver power	20dBm
Oras ng boot	Less than 2sec
Operationg time	Maximum na 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. Uri ng Networking

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.

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

4. Electrical and Interface

Mga Parameter	Halaga
UAV Installed Module
Input na boltahe	9~18V
Serial Port	1, RS422
Serial Baud Rate	9600~460800bps,
Antenna Connector	SMA
Interface Connector	J30J or DB type
Timbang	Less than 150g
Ang laki (LxWxH)	8 × 8 × 3 cm
GS Installed Module
Input na boltahe	9~18V
Serail Port	1, RS422
Serial Buad Rate	9600~460800bps,
Ethernet	RJ-45, 100Mbps
Antenna Connector	N-Type
Interface Connector	J30J or DB type
Timbang	Less than 500g
Ang laki (LxWxH)	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. paki check ang link sa ibaba.