When selecting a wireless transmission solution for drones or UAVs, customers often ask about 正交频分复用与正交频分复用, Pixhawk telemetry integration, and performance in obstructed environments. Here we answer the most common questions.

Q1: Can TX900 be modified to use COFDM technology?

一个: 没有, TX900 is based on OFDM with TDD (时分双工). It is optimized for low-latency video and bidirectional telemetry and cannot be converted to COFDM.

Q2: Why consider COFDM instead of OFDM?

COFDM is preferred when 非视距性能 很关键, such as in 城市地区, 山区地形, or obstructed environments. Its advantages include:

强的 diffraction and multipath resistance
Reliable video transmission in harsh RF conditions
High stability in challenging environments

Q3: OFDM vs COFDM – Key Differences

特征	OFDM (TX900)	COFDM图传
系统复杂性	低的	更高
延迟	低的 (实时控制)	稍高一点
Best Environment	视距 / Semi-LOS	NLOS / Obstructed
数据 + 视频	Bidirectional telemetry & 高清视频	Video-centric; telemetry may need adaptation
复式	时分双工	Usually FDD

第四季度: COFDM Solutions for UAVs

If COFDM is needed, 我们推荐:

Vcan1886 Mini COFDM Module

FDD-based COFDM transmission
视频 + data over Ethernet (RJ45)
Suitable for NLOS environments
View Product

Customized High-Power COFDM Options:

300–500 MHz COFDM IP RJ45 Transceiver, 10 在宾夕法尼亚州
View Product
336–554 MHz COFDM IP FDD Transceiver, 5 在宾夕法尼亚州
View Product

笔记:

Larger/heavier enclosures – less suitable for small UAVs
RS232 data output only; Pixhawk requires RS232-to-TTL conversion

Q5: How to choose between TX900 (OFDM) and COFDM?

Choose TX900 (OFDM) 如果:

LOS or lightly obstructed environment
Low-latency video and telemetry is required
UAV size and weight are limited

Choose COFDM 如果:

NLOS or harsh environment
Diffraction and multipath resistance are critical
Slightly larger hardware is acceptable

Q6: Integrating COFDM with Pixhawk

RS232-to-TTL conversion may be needed
Integration requires planning due to limited data ports
Works best when NLOS reliability is more important than minimal latency

结论:
TX900 OFDM modules are ideal for lightweight UAVs in LOS conditions, 交付 low-latency video and telemetry. COFDM solutions provide better NLOS performance, but may require larger hardware and additional integration effort for Pixhawk telemetry.