10watts MIMO IP MESH for 150 km Real Time Video Downlink

Introduction

FD-615MT is a 10watts IP MESH broadband radio link for long range real time video and data transmitting.

Based on TD-LTE technology standard, it has better sensitivity -103dbm/10Mhz for high speed moving. It is always used for unmanned land vehicles, unmanned ships and drones to do wireless communications with each other.

This testig was held in 31st May 2019. It is aimed to prove the 10watts IP MESH link modules ability and data rate for 130km-150km. According to the curvature of the earth and the Fresnel radius, we chose 3 test sites for 130km, 140km and 150km.

Distance(km)	Earth Curvature	Frequency(Mhz)	Distance(km)	D1(km)	D2(km)	Fresnel Radius
50	0.196201538	1437	50	25	25	0.051084277
100	0.784806153	1437	100	50	50	0.072244077
110	0.949615445	1437	110	55	55	0.075770227
120	1.13012086	1437	120	60	60	0.079139421
130	1.326322398	1437	130	65	65	0.082370921
140	1.53822006	1437	140	70	70	0.085480345
150	1.765813844	1437	150	75	75	0.088480563

Content

1.Items for The Testing

2.Configuration of FD-615MT

3.FD-615MT(1) Location

4.Test Site 1 (Distance: 129.8km)

5.Test Site 2 (Distance: 139.6km)

6.Test Site 3 (Distance: 149.9km）

7.Test Site 4 with Muilti-rotor Drone (Distance: 149.9km)

8.Conclusion

1.Items for The Testing

2*FD-615MT	1*Multi-Rotor Drone	1*IP Camera
4*Rubber Rod Antenna	1*Tripod	2*Laptop

2.Configuration of FD-615MT

Frequency	1437.9Mhz	Transmitting Power	40dBm
Bandwidth	20Mhz	TDD	1D4U(Downlink:Uplink=1:4)

3.FD-615MT(1) Location

Latitude	30.3451569	Antenna	2dBi Omni Rubber Rod Antenna
Longitude	119.4210258	Antenna Length	16cm
Altitude	1200meters	Connection	FD-615MT(1) connect with PC

FD-615MT(1) Location(Weight: 280g)

4.Test Site 1 (Distance: 129.8km)

4.1 FD-615MT(2) Location

Latitude	30.29885389	Antenna	2dBi Omni Rubber Rod Antenna
Longitude	120.7744492	Antenna Length	16cm
Altitude	-0.8meter	Connection	FD-615MT(2) connect with PC and IP Camera

FD-615MT(2) Location

4.2 Test 1

FD-615MT(2) connected with PC and IP camera sent the real time video and packet command to FD-615MT(1)

4.3 Result 1

From the PC screen shot of FD-615MT(1) you can see that the SNR value was stabilized around 10dB

Test 1: PC screen shot of FD-615MT(1)

From the PC screen shot of FD-615(2), the uplink data rate is 10Mbps for 129.8km range.

Test 1: PC screen shot of FD-615MT(2) 

5.Test Site 2 (Distance: 139.6km)

5.1 FD-615MT(2) Location

Latitude	30.2194148	Antenna	2dBi Omni Rubber Rod Antenna
Longitude	120.8676543	Antenna Length	16cm
Altitude	6.93meters	Connection	FD-615MT(2) connect with PC and IP Camera

5.2 Test 2

FD-615MT(2) connected with PC and IP camera sent the real time video and packet command to FD-615mt(1)

5.3 Result 2

From the PC screen shot of FD-615MT(1) you can see that the SNR value was stabilized around 0dB and the uplink data rate is 3.5Mbps

Test 2: PC screen shot of FD-615MT(1)

6.Test Site 3 (Distance: 149.9km)

6.1 FD-615MT(2) Location

Latitude	30.3010946	Antenna	2dBi Omni Rubber Rod Antenna
Longitude	120.7673633	Antenna Length	16cm
Altitude	-0.83meters	Connection	FD-615MT(2) connect with PC and IP Camera

6.2 Test 3

FD-615MT(2) connected with PC and IP camera sent the real time video and packet command to FD-615mt(1)

6.3 Result 3

The SNR value was stabilized at -4dB~-2dB. At this time, the data rate is 1.5Mbps~2Mbps. It is not enough for full HD 1080P video transmitting.

Test 3: PC screen shot of FD-615MT(1)

7.Test Site 4 with Muilti-rotor Drone (Distance: 149.9km)

7.1 FD-615MT(2) was carried by a multi-rotor drone

Latitude	30.3010946	Antenna	2dBi Omni Rubber Rod Antenna
Longitude	120.7673633	Antenna Length	16cm
Altitude	100meters	Connection	FD-615MT(2) connect with IP Camera

7.2 Test 4

FD-615MT(2) connected with the IP camera onboard and sent the real time video to FD-615mt(1). When the drone fly vertical height is 100meters, FD-615MT(1) smoothly displayed the 1080P, h.265, 2.5Mbps video on PC.

7.3 Result 4

The SNR value was stabilized at 1dB~2dB. At this time, the uplink data rate is 4Mbps.

Test 4: PC screen shot of FD-615MT(1)

Conclusion

From the testing result, the FD-615MT can reach 100km-150km range for real time video transmitting air to ground. For ground to ground it supports NLOS 3KM-10KM for unmanned land vehicle, UGVs and ships with duplex control data and TCPIP/UDP signal.