Q. The frequency separation between each forward and reverse channel changes throughout the system.

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Q. Time division duplexing uses ________ to provide both a forward and reverse link.

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Q. TDD is effective for _________

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Q. In wideband systems, the transmission bandwidth of a single channel _________ coherence bandwidth of the channel.

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Q. In narrowband system, the channels are usually operated using TDD.

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Q. Narrowband FDMA allows users to share the same radio channel allocating a unique time slot to each user.

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Q. Frequency division multiple access (FDMA) assigns ______ channels to _______ users.

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Q. During the period of call, other users can share the same channel in FDMA.

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Q. The FDMA channel carries ____________ phone circuit at a time.

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Q. If the FDMA channel is not in use, it can be used by other users.

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Q. The bandwidth of FDMA channel is ______

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Q. The symbol time in FDMA systems is _________ thus intersymbol interference is ______

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Q. Due to _________ transmission scheme __________ bits are needed for overhead in FDMA systems.

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Q. Which of the following is not true for FDMA systems as compared to TDMA systems?

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Q. __________ is undesired RF radiation.

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Q. __________ is based on FDMA/FDD.

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Q. In US AMPS, 416 channels are allocated to various operators with 10 kHz guard band and channel between them is 30 kHz. What is the spectrum allocation given to each operator?

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Q. TDMA systems transmit in a continuous way.

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Q. Preamble contains __________

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Q. __________ are utilized to allow synchronization of the receivers between different slots and frames.

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