FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -d) Multiple access technique. Explanation: In conventional telephone systems, it is possible to talk and listen simultaneously. This effect is called duplexing and is generally required in wireless telephone systems.

Detailed explanation-2: -The FDMA mobile unit uses duplexers since both the transmitter and receiver operate at the same time. A duplexer adds weight, size, and cost to a radio transmitter and can limit the minimum size of a subscriber unit. FDMA requires tight RF filtering to minimize adjacent channel interference.

Detailed explanation-3: -Definition. Multiple access techniques allow multiple terminals to share the common communication medium based on multiplexing. The multiplexing is provided in the physical layer, and the shared communication medium can be wired cables or wireless spectrum.

Detailed explanation-4: -TDMA is a multiple access technique that has answer choices. Different users in different time slots. Each user is assigned unique frequency slots. Each user is assigned a unique code sequence. Each signal is modulated with frequency modulation technique.

Detailed explanation-5: -There are five basic access or multiplexing methods: frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA), orthogonal frequency division multiple access (OFDMA), and spatial division multiple access (SDMA).