What is duplexing in wireless communication?

Duplexing refers to the method of separating uplink (device to base station) and downlink (base station to device) transmissions in a two-way communication system. The two main types are: FDD (Frequency Division Duplexing) uses separate frequency bands for uplink and downlink, requiring guard bands and duplexer filters. TDD (Time Division Duplexing) uses the same frequency but alternates between uplink and downlink in different time slots. FDD offers constant latency; TDD allows flexible allocation but requires synchronization.