တန်ဖိုးနည်း UAV ရေဒီယိုဒေတာလင့်ခ်

မာတိကာ

1. နိဒါန်း

The digital data link modules are used for the communication between UAVs and the ground station (ဂျီ) 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.

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

2. နည်းပညာဆိုင်ရာသတ်မှတ်ချက်များ

ကန့်သတ်ချက်များ	တန်ဖိုး
Maximum Operating Range	25ကီလိုမီတာ
Operating Height	10-5000မီတာ
Max UAVs Speed	100ဒေါ်
frequency Band	လှိုင်းနှုန်းသည် UHF (upper 400MHz)
Frequency Channel Selection	ဟုတ်ကဲ့
ကြိမ်နှုန်းခုန်ခြင်း။	optional (နှစ်သက်သည်။)
UAV module Transmit Power	2ဒဗလျူ
GS module Transmit Power	10ဒဗလျူ
ဒေတာနှုန်း	See the below figures (software selectable in range of 1kbps to 500kbps)
Packet transmission delay	≤ 5 မီလီစက္ကန့
အမှားရှာဖွေခြင်း။	စီအာစီ
Channel Coding (FEC)	ဟုတ်ကဲ့
encryption	ဟုတ်ကဲ့
Senstivity	−122dBm@20kbps −199dBm@40kbps −111dBm@230kbps −108dBm@500kbps
MIMO Antenna	optional
စစ်ဆင်ရေး mode ကို	Point to Point (GS to one UAV) Point to MultiPoint (GS to maximum 12 UAVs on air, တပြိုင်နက်တည်း)
Receive satuation power	10dBm
No damage receiver power	20dBm
အချိန်	Less than 2sec
Operationg time	အများဆုံး 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. Networking အမျိုးအစား

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.

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

4. Electrical and Interface

ကန့်သတ်ချက်များ	တန်ဖိုး
UAV Installed Module
input ဗို့အား	9~18V
အမှတ်စဉ် ဆိပ်ကမ်း	1, RS422
Serial Baud Rate	9600~460800bps,
အင်တင်နာ Connector	high School တွင်
Interface Connector	J30J or DB type
အလေးချိန်	Less than 150g
အရွယ် (lxwxh)	8 × 8 × 3 စင်တီမီတာ
GS Installed Module
input ဗို့အား	9~18V
Serail Port	1, RS422
Serial Buad Rate	9600~460800bps,
Ethernet	RJ-45, 100Mbps
အင်တင်နာ Connector	N-Type
Interface Connector	J30J or DB type
အလေးချိန်	Less than 500g
အရွယ် (lxwxh)	15 × 10 × 4 စင်တီမီတာ

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. ကျေးဇူးပြု၍ အောက်ပါ link ကိုစစ်ဆေးပါ။.