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Reply To: Difference between FDMA and FDD.


Hi Avi,
FDMA(Frequency Division Multiple Access) is a technique of access to the system by many subscribers having different frequencies. Here each user is allotted a different frequency for its identity.
FDD(Frequency Division Duplex) is a technique where frequencies are transmitted and received simultaneously with a frequency offset between them.
Radio broadcast is a simplex system,two way radio is semi duplex while ordinary telephone is a duplex system.