explain the term interference in the time,space,frequency and code domain
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Explain the term interference in the space, time, frequency and code domain. What are countermeasures in SDMA, TDMA, FDMA, and CDMA systems?
well In a FDMA system, each user is allocated a duplex channel i.e one for uplink and other for down link voice communication. Also, these channels need to be guarded from each other for interference by providing sufficient seperation in the spectrum through the use of guard bands. If a US celluar operator is allocated 25 MHz of spectrum, and guard band must be at least 10 KHz and each simplex voice channel is 30 KHz, then:
1. Find the number of channels in a FDMA system.
2. Find the number of users FDMA can support at the same time.
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