Question 1

__________     synchronization overhead is required in TDMA due to_________     transmission.

Accepted Answer

A) high, burst 
B) high, continuous 
C) low, burst 
D) no, burst 
A) high, burst 
B) high, continuous 
C) low, burst 
D) no, burst A

Question 2

Frequency division multiple access (FDMA) assigns_________  channels to_________     users.

Accepted Answer

A) individual, individual 
B) many, individual 
C) individual, many 
D) many, many 
A) individual, individual 
B) many, individual 
C) individual, many 
D) many, many A

Question 3

Robustness gives the inability of a signal to withstand the impairments.

Accepted Answer

A) True 
 B)False  False

Question 4

Chips are the

Accepted Answer

A) repeated symbols 
B) non repeated symbols 
C) smallest length symbols 
D) none of the mentioned 
A) repeated symbols 
B) non repeated symbols 
C) smallest length symbols 
D) none of the mentioned

Question 5

Slow frequency hopping is

Accepted Answer

A) several hops per modulation 
B) several modulations per hop 
C) several symbols per modulation 
D) none of the mentioned 
A) several hops per modulation 
B) several modulations per hop 
C) several symbols per modulation 
D) none of the mentioned

Question 6

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?

Accepted Answer

A) 12.5 khz 
B) 30 khz 
C) 12.5 mhz 
D) 30 mhz 
A) 12.5 khz 
B) 30 khz 
C) 12.5 mhz 
D) 30 mhz

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

__________     is undesired RF radiation.

Accepted Answer

A) intermodulation frequency 
B) intermediate frequency 
C) instantaneous frequency 
D) instrumental frequency 
A) intermodulation frequency 
B) intermediate frequency 
C) instantaneous frequency 
D) instrumental frequency

Question 9

TDMA systems transmit in a continuous way.

Accepted Answer

A) True 
 B)False

Question 10

The processing gain is given as_________  modulation scheme.

Accepted Answer

A) wss/r 
B) r/wss 
C) wss/2r 
D) r/2wss 
A) wss/r 
B) r/wss 
C) wss/2r 
D) r/2wss

Question 11

Which modulation scheme is preferred for direct sequence spread spectrum process?

Accepted Answer

A) bpsk 
B) qpsk 
C) bpsk & qpsk 
D) none of the mentioned 
A) bpsk 
B) qpsk 
C) bpsk & qpsk 
D) none of the mentioned

Question 12

Because of_________    transmissions in TDMA, the handoff process in_________

Accepted Answer

A) continuous, complex 
B) continuous, simple 
C) discontinuous, complex 
D) discontinuous, simple 
A) continuous, complex 
B) continuous, simple 
C) discontinuous, complex 
D) discontinuous, simple

Question 13

Which system allows larger processing gain?

Accepted Answer

A) direct sequence 
B) frequency hopping 
C) direct sequence & frequency hopping 
D) none of the mentioned 
A) direct sequence 
B) frequency hopping 
C) direct sequence & frequency hopping 
D) none of the mentioned

Question 14

TDMA allocates a single time per frame to different users.

Accepted Answer

A) True 
 B)False

Question 15

The bandwidth of FDMA channel is

Accepted Answer

A) wide 
B) narrow 
C) large 
D) zero 
A) wide 
B) narrow 
C) large 
D) zero

Question 16

Fast frequency hopping is

Accepted Answer

A) several modulations per hop 
B) several modulations per symbol 
C) several symbols per modulation 
D) none of the mentioned 
A) several modulations per hop 
B) several modulations per symbol 
C) several symbols per modulation 
D) none of the mentioned

Question 17

In which technique is phase coherence hard to maintain?

Accepted Answer

A) direct sequence 
B) frequency hopping 
C) direct sequence & frequency hopping 
D) none of the mentioned 
A) direct sequence 
B) frequency hopping 
C) direct sequence & frequency hopping 
D) none of the mentioned

Question 18

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

Accepted Answer

A) preamble 
B) data 
C) guard bits 
D) trail bits 
A) preamble 
B) data 
C) guard bits 
D) trail bits

Question 19

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

Accepted Answer

A) low complexity 
B) lower cell site system cost 
C) tight rf filtering 
D) narrow bandwidth 
A) low complexity 
B) lower cell site system cost 
C) tight rf filtering 
D) narrow bandwidth

Question 20

Which type of demodulator is used in the frequency hopping technique?

Accepted Answer

A) coherent 
B) non coherent 
C) coherent & non coherent 
D) none of the mentioned 
A) coherent 
B) non coherent 
C) coherent & non coherent 
D) none of the mentioned

__ synchronization overhead is required in TDMA due to_ transmission.

Frequency division multiple access (FDMA) assigns_ channels to_ users.

Robustness gives the inability of a signal to withstand the impairments.

Chips are the

Slow frequency hopping is

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?

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

__________ is undesired RF radiation.

TDMA systems transmit in a continuous way.

The processing gain is given as_________ modulation scheme.

Which modulation scheme is preferred for direct sequence spread spectrum process?

Because of_ transmissions in TDMA, the handoff process in_

Which system allows larger processing gain?

TDMA allocates a single time per frame to different users.

The bandwidth of FDMA channel is

Fast frequency hopping is

In which technique is phase coherence hard to maintain?

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

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

Which type of demodulator is used in the frequency hopping technique?

Modulation and Demodulation Techniques

Information Theory and Communication Techniques

Waveform Logic, Pcm Encoding, Vocoder Analysis, and Antenna Radiations

Microwave Communication and Modulation

M-Ary Signalling and Pulse Shaping Techniques

Signal Filtering and Equalization Techniques

Information Theory and Coding Techniques

Channel Coding and Error Correction Techniques

Algorithms and Techniques for Communication System Security and Error Correction

Digital and Analog Telecommunications Standards

Filters

Exam 10: Modulation Schemes and Access Techniques for Spread Spectrum Systems

__________ synchronization overhead is required in TDMA due to_________ transmission.

Frequency division multiple access (FDMA) assigns_________ channels to_________ users.

Robustness gives the inability of a signal to withstand the impairments.

Chips are the

Slow frequency hopping is

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?

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

__________ is undesired RF radiation.

TDMA systems transmit in a continuous way.

The processing gain is given as_________ modulation scheme.

Which modulation scheme is preferred for direct sequence spread spectrum process?

Because of_________ transmissions in TDMA, the handoff process in_________

Which system allows larger processing gain?

TDMA allocates a single time per frame to different users.

The bandwidth of FDMA channel is

Fast frequency hopping is

In which technique is phase coherence hard to maintain?

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

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

Which type of demodulator is used in the frequency hopping technique?

Modulation and Demodulation Techniques

Information Theory and Communication Techniques

Waveform Logic, Pcm Encoding, Vocoder Analysis, and Antenna Radiations

Microwave Communication and Modulation

M-Ary Signalling and Pulse Shaping Techniques

Signal Filtering and Equalization Techniques

Information Theory and Coding Techniques

Channel Coding and Error Correction Techniques

Algorithms and Techniques for Communication System Security and Error Correction

Digital and Analog Telecommunications Standards

Filters

__ synchronization overhead is required in TDMA due to_ transmission.

Frequency division multiple access (FDMA) assigns_ channels to_ users.

Because of_ transmissions in TDMA, the handoff process in_