The propagation of high-frequency (HF) radio waves in an inhomogeneous magnetoactive plasma and generation of plasma waves at the resonance layer near the reflection layer of the ordinary mode are studied using one-dimensional (1-D) and two-dimensional full-wave codes. The characteristics of the mode-conversion process are investigated in linear and parabolic density profiles as the angle of incidence is varied. We present the 1-D results for the wave propagation relevant to the high-latitude heater facility at Troms¿ and the midlatitude facility at Arecibo. For the facility at Arecibo, the 2-D wave propagation in a plasma density approximating an overdense sporadic-E patch is investigated to determine the localized regions of amplified intensity, where plasma waves can facilitate acceleration of fast energetic electrons, resulting in observed enhanced airglow.