Overlap zone

In <a href="/facts/Radio_frequency_engineering/fpFFb036">radio frequency engineering</a>, an overlap zone occurs where signals from two or more <a href="/facts/Radio_station/FLJVq8Ec">radio stations</a>, transmitting at the same frequency, can be received with comparable intensity. <a href="/facts/Co-channel_interference/I95JpU6Y">Interference</a> occurs frequently in such a zone.
In order to avoid this, a receiver with <a href="/facts/Directional_antenna/oLesxknQ">directional antenna</a> is used, which can then be aligned in such a way that it will only receive the signal of one transmitter. Alternatively, the signals could be separated using a demodulator in <a href="/facts/Single_sideband/Cfuv9KX1">single sideband mode</a>.
With <a href="/facts/Digital_radio/X0Kp5l8E">digital radio</a> (<a href="/facts/Digital_Radio_Mondiale/5ghjL3ec">Digital Radio Mondiale</a> and <a href="/facts/Digital_Audio_Broadcasting/9GNkj4kL">Digital Audio Broadcasting</a> being two common types), there is no interference in the overlap zone.

1 - Multifunctional Ultrawideband Antennas Trends, Techniques and Applications By Chinmoy Saha, Jawad Y. Siddiqui, and Yahia M.M. Antar - 2019. P.3 - P.11 - P.46, 47 - P.65.

Overlap zone open-in-new

Overlap zone