What's the difference between digital shortwave radio and ultrashort wave radio?

Short-wave radio stations work at 3-30MHz, and ultrashort wave radio stations generally work at 50-500 MHz (more than 300 m is often classified as ultrashort wave in applications).

Short-wave radio stations are suitable for long-distance communication, and are generally used in the range of1000 km-1000 km.

Ultrashort wave radio is suitable for short-distance communication, within 50 kilometers.

Short-wave radio has a small carrier bandwidth and can only transmit data at low speed, which is greatly affected by the environment. Advanced applications are replaced by satellite digital communication.

The carrier bandwidth of ultrashort wave radio station is larger, which can ensure the data transmission rate and is less affected by the environment. Generally used for data transmission in cities.