5km NLOS wireless video transmitter low latency

5km NLOS Wireless Video Transmitter – Low Latency Solution

I am looking for a wireless video transmission system to use with my drone while flying through a valley. The scenario involves non-line-of-sight (NLOS) conditions, with trees and other obstacles between the drone and the ground station, over a distance of approximately 5 km. My primary requirement is a low-latency transmission system, and I do not need full HD or digital video. Since this is for a hobbyist application, I am also looking for a cost-effective solution that is simple to operate and reliable in challenging terrain.

Considering these requirements, I am wondering if COFDM (Coded Orthogonal Frequency Division Multiplexing) technology would be a suitable choice. COFDM is known for its ability to handle NLOS conditions, multipath reflections, and interference, making it ideal for transmitting video through obstacles such as trees, hills, or buildings. The robust modulation scheme ensures that the video feed remains stable even in environments where traditional analog or simple digital transmitters may fail.

For my application, ultra-high definition or digital video encoding is not necessary; I only need a reliable analog or low-resolution digital feed with minimal latency. Low latency is critical because I need to control the drone in real time and respond to obstacles quickly. A typical COFDM system can provide latency as low as 30–50 ms, which is sufficient for hobby flight operations while maintaining a clear, uninterrupted video feed.

I am also looking for affordable and lightweight solutions, suitable for small drones. The system should ideally include both a compact transmitter mounted on the drone and a lightweight receiver on the ground, with simple power requirements and minimal setup. Additional features such as adjustable frequency and bandwidth, compatibility with standard analog video inputs (e.g., CVBS), and the ability to operate in different RF environments would be advantageous.

I came across the following product as a possible option: 15–30 km Long-Distance Wireless Video Transmitter/Receiver. While this system is designed for longer distances, it demonstrates the capabilities of COFDM technology in handling NLOS conditions and maintaining stable transmission. I am curious if a similar, scaled-down version could be recommended for 5 km NLOS flights, focusing on low latency and affordability for a hobbyist drone setup.

In summary, my requirements are:

• Distance: ~5 km through a valley with trees (NLOS)
• Video quality: Standard definition or analog, no HD needed
• Latency: Ultra-low latency for real-time control
• Cost: Affordable for hobbyist use
• Drone compatibility: Lightweight and compact system
• Reliability: Stable transmission in NLOS conditions

I would appreciate any recommendations on suitable COFDM or other wireless video systems that meet these criteria, including product options, setup requirements, and expected performance in NLOS conditions.