Q. A TDMA system uses 25 MHz for the forward link, which is broken into radio channels of 200 kHz. If 8 speech channels are supported on a single radio channel, how many simultaneous users can be accommodated?

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Q. What is the time duration of a bit if data is transmitted at 270.833 kbps in the channel?

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Q. SSMA uses signals which have a transmission bandwidth that is smaller than the minimum required RF bandwidth.

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Q. PN sequence converts _______ signal to ______ signal.

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Q. SSMA is bandwidth efficient when used with a single user.

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Q. ___________ is a digital multiple access system in which carrier frequencies are varied in pseudorandom order.

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Q. If the rate of change of the carrier frequency is greater than the symbol rate, then the system is referred as ___________

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Q. A frequency hopped system does not provide security.

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Q. All users in CDMA system uses __________ carrier frequency.

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Q. ___________ problem occurs when many mobile users share the same channel.

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Q. In CDMA, symbol duration is ___________ than channel delay spread.

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Q. ____________ is used to improve reception by collecting time delayed versions of the required signal.

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Q. ____________ arises from the fact that the spreading sequences of different users are not orthogonal.

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Q. In ___________ technique, many subscribers attempt to access a single channel in an uncoordinated manner.

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Q. Packet radio uses _________ and __________ signals for perfect feedback.

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Q. Packet radio has high spectral efficiency.

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Q. ___________ is defined as average number of messages successfully transmitted per unit time in packet radio multiple access technique.

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Q. What is the time period during which the packets are susceptible to collisions with transmissions from other users?

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Q. For a PR multiple access technique, packet transmissions occur with __________ distribution.

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Q. If λ is mean arrival rate and τ is the packet duration, then traffic occupancy of a packet radio network is equal to _________

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