Certain modulation schemes such as orthogonal frequency-division multiplexing ( OFDM ) and code division multiple access ( CDMA ) are well-suited to employing frequency diversity to provide robustness to fading.
12.
In 2011, Shure previewed Axient, a wireless management network, which includes features for spectrum management, remote control, interference detection and avoidance, frequency diversity, and the use of Li-ion rechargeable batteries to eliminate the use of ordinary AA and AAA batteries.
13.
During much of the Cold War, directional antennas and added extra frequencies ( known as " barrage " or " frequency diversity " broadcasting ) to the already heavily overcrowded shortwave bands to such an extent that many broadcasters not directly targeted by the jammers ( including pro-Soviet stations ) suffered from the rising levels of noise and interference.
