Which radio communication mode utilizes the basic frequency and one of the sidebands?

The radio communication mode that utilizes the basic frequency and one of the sidebands is Single Sideband (SSB). In SSB transmission, the carrier frequency and one of the sidebands (either the upper or lower sideband) are transmitted while the other sideband and the carrier are suppressed. This approach makes SSB more efficient in terms of power and bandwidth compared to amplitude modulation (AM) and double sideband (DSB) modes.

AM uses both the upper and lower sidebands with a carrier frequency, which results in a wider bandwidth and more power consumption. Frequency modulation (FM) does not utilize sidebands in the same manner as it varies the frequency of the carrier signal instead of modulating amplitude. DSB, while it does involve sidebands, still transmits both sidebands along with the carrier, making it less efficient than SSB.

Thus, SSB is preferred for voice communication in amateur radio and other applications, as it provides clearer signals over long distances and requires less transmitting power.