What are the general methods to solve co-channel interference? (Multiple choice)

Question

Options

• AAdjust AP transmit power, adjust antenna feed
• BReasonable frequency reuse to ensure that the same channel does not appear in the same or
• CMore use of omnidirectional antennas for coverage
• DUse barriers for natural isolation

• A
  79% (33)
• C
  21% (9)

Explanation

Co-channel interference occurs when multiple access points (APs) use the same wireless channel, causing signal collisions and degraded performance. A is correct because reducing AP transmit power limits the signal radius, shrinking the interference zone, and adjusting antenna orientation focuses energy away from co-channel neighbors. B is correct because proper frequency reuse planning - spacing APs on the same channel far enough apart - is the foundational RF design principle for eliminating co-channel overlap. D is correct because physical barriers (walls, floors, terrain) provide natural attenuation, increasing the effective isolation between co-channel cells without any configuration changes. C is wrong because omnidirectional antennas actually worsen co-channel interference by radiating signal in all directions, maximizing overlap with neighboring cells - directional antennas are preferred for reducing interference.

Memory tip: Think "Power, Plan, and Physical" - the three P's of co-channel interference control (adjust Power, Plan frequency reuse, use Physical barriers). Omni antennas are the trap answer because more coverage sounds helpful but actually spreads the interference problem further.

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