ABSTRACT
In today's crowded media environment, having a large share of listeners and viewers is a must for the survival of a radio or television station. For frequency modulated (FM) radio, the Federal Communications Commission (FCC) method of predicting coverage requires calculating the effective antenna height of a station antenna along paths of a minimum of eight evenly spaced radials, starting at 3 kilometers from the transmitter and ending at 16 kilometers. Commercial and noncommercial stations have different rules that impact how much coverage these stations may have. Modern FM broadcast transmitting antennas are typically cross- or circularly polarized, where both the vertical and horizontal components transmit from the same antenna. The Longley-Rice propagation model is used by the FCC in digital television coverage and interference analysis. Hata/Davidson does not use some of the adjustment factors included in Okumura, such as the slope of the terrain, street orientation, and correction for location on hills.
