קישור לרדיו למל"ט בעלות נמוכה

קישור לרדיו למל"ט בעלות נמוכה

1. מבוא

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.

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

2. מפרט טכני

פרמטרים	ערך
Maximum Operating Range	25ק"מ
Operating Height	10-5000M
Max UAVs Speed	100גברת
תחום תדרים	UHF (upper 400MHz)
Frequency Channel Selection	כן
קפיצת תדרים	אופציונאלי (מועדף)
UAV module Transmit Power	2W
GS module Transmit Power	10W
קצב נתונים	See the below figures (software selectable in range of 1kbps to 500kbps)
Packet transmission delay	≤ 5 האלפית שני
איתור שגיאות	CRC
Channel Coding (FEC)	כן
הצף	כן
Senstivity	−122dBm@20kbps −199dBm@40kbps −111dBm@230kbps −108dBm@500kbps
MIMO Antenna	אופציונאלי
מצב הפעלה	נקודה לנקודה (GS to one UAV) Point to MultiPoint (GS to maximum 12 UAVs on air, בּוֹ זְמַנִית)
Receive satuation power	10dBm
No damage receiver power	20dBm
זמן אתחול	Less than 2sec
Operationg time	מַקסִימוּם 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. סוג רשת

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.

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

4. Electrical and Interface

פרמטרים	ערך
UAV Installed Module
מתח נכנס	9~18V
נמל סדרתי	1, RS422
קצב בונד סדרתי	9600~460800bps,
מחבר אנטנה	תיכון
Interface Connector	J30J or DB type
מִשׁקָל	Less than 150g
גודל (LxWxH)	8 × 8 × 3 ס"מ
GS Installed Module
מתח נכנס	9~18V
Serail Port	1, RS422
Serial Buad Rate	9600~460800bps,
אתרנט	RJ-45, 100Mbps
מחבר אנטנה	N-Type
Interface Connector	J30J or DB type
מִשׁקָל	Less than 500g
גודל (LxWxH)	15 × 10 × 4 ס"מ

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. אנא בדוק את הקישור למטה.