Orthogonal frequency-division multiplexing (OFDM) is a technique used for which types of amateur communication?

Orthogonal frequency-division multiplexing (OFDM) is a popular digital modulation scheme that distributes data across many closely spaced, parallel subcarriers. In amateur radio, it is primarily utilized for high-speed digital modes and amateur digital television. Because it uses complex signal processing to encode bits across multiple frequencies, it is strictly a digital technique rather than an analog one. It is highly resistant to multipath fading, making it ideal for robust digital data transmission. The distractors are incorrect because OFDM is not limited to or primarily designed for extremely low-power (QRP) contacts or Earth-Moon-Earth (EME) communication, nor is it banned on amateur bands.