What is the bandwidth of 4G technology? 1. 100–150 Mbps2. 2 Mbps

3. 14.4 Kbps

4. 1 Kbps

What is the multiplexing used in 4G technology? 1. CDMA2. WCDMA

3. OFDM

4. FDMA

3G wireless data network uses? 1. circuit switched2. packet switched

3. both

4. none

What is the switching technology used in 4G technology? 1. circuit switched2. packet switched

3. digital with packet voice

4. both (a) & (b)

Which type of antenna is used in OFDM technique? 1. Yagi uda2. smart antenna

3. log periodic

4. micro strip antenna

What is the main application of 4G technology? 1. virtual navigation2. geo mapping

3. high speed data transmission

4. all the above

1. (a), 2. (c), 3. (c), 4. (c), 5. (b), 6. (d).

The main benefits of the GPRS architecture are its 1. flexibility2. scalability

3. interoperability

4. all the above

Modulation technique used in GSM is 1. 8PSK2. BPSK

3. GMSK

4. none

Modulation technique used in EDGE is 1. 8PSK2. BPSK

3. GMSK

4. none

The PDP context activation aims to establish a PDP context between 1. mobiles2. networks

3. mobile and network

4. none

5. ——— is an extension of the GSM system.

6. EDGE stands for ———.

7. ——— are responsible for the delivery and routing of data packets between the MSs and the external PDNs.

8. The BSS and the SGSN are connected by the ——— using frame relay.

9. ——— is used for both signalling and voice transmission in GSM in GPRS architecture.

10. The gross data rate over the radio interface with EDGE is ———.

11. The mobile station exchanges messages only with the ———, which acts as a relay to the GGSN.

12. EDGE uses the same radio interface as ———.

13. If a subscriber has all eight time slots of a carrier, the maximal theoretical data rate with EDGE is ———.

14. In network-initiated PDP context, the deactivation procedure is initiated by ———.

15. The mobile station sends a PDP context activation request to the ———.

Answers: 1. (d), 2. (c), 3. (a), 4. (c), 5. GPRS, 6. EDGE, 7. GSNs, 8. Gb interface, 9. Aninterface, 10. 69.2Kbps, 11. SGSN, 12. GSM, 13. 473.6Kbps, 14. GGSN, 15. SGSN.

Power control frequency of WCDMA is 1. 900 Hz2. 1,500 Hz

3. 700 Hz

4. 1,400 Hz

Chip rate of CDMA2000 is 1. 4.096 MHz2. 5.6864 MHz

3. 3.0864 MHz

4. 3 MHz

Codes that are used in UMTS WCDMA are 1. OVSF codes2. Walsh codes

3. Both a and b

1x EV-DO is also known as 1. Bandwidth on Demand (BoD)2. Qualcomm High Data Rate (QHDR

3. QPSK

4. Radio network controller (RNC)

CDMA2000 3x-RTT is using ——— radio channels 1. Two 1.25 MHz2. Three 2.25 MHz

3. Two 2.25 MHz

4. Three 1.25 MHz

CDMA2000 year of introduction, channel Bandwidth (kHz) are

1. 2000, 1,2502. 2000, 2,000

3. 1998, 1,250

4. 2002, 2,000

A good quality speech connection in GSM requires C/I =———dB. 1. 9–11 dB2. 8–12 dB

3. 11–14 dB

4. 9–12 dB

DS-CDMA uses 1. FDD2. TDD

3. Both a and b

4. Duplexing method

Quality control of WCDMA is ———

Maximum number of users (M) in a channel that can be used simultaneously is

 

 

The standard used in 3G system is 1. WCDMA2. CDMA

3. DS

4. UMTS

Answers: 1. (b), 2. (c), 3. (a), 4. (b), 5. (d), 6. (b), 7. (d), 8. (c), 9. Radio Resource Management Algorithm, 10. (d), 11. (a).

1. Determine the maximum number of simultaneous users in a system given by and bandwidth = 20 KHz at a given bit rate of 100 bits/sec.

[Hint: ]

2. Determine the channel capacity of CDMA system with the following specifications: a = 1 and β = 0.75 with a data rate of 10 Kbps and for a 10 Kbps vocoder and fc = 1.5.

Mcps and

3. Determine the ratio of if carrier power = 5 W and power due to interference = 2.4 W and fchip = 50 Mcps and fdata = 25 Mbps.

What type of transmission techniques used in 1G 1. digital2. analogue

3. both (a) and (b)

Bandwidth consideration in 1G is ———

1. 9.6 Kbps2. 7.6 Kbps

3. 9.6 Mbps

4. 8.6 Mbps

QPSK means ——— Technologies used in 2G are ———

Technologies including in 2.5G are ———

6. The problem in 2.5G standards is ———

1. low data rate

2. less BW

3. low interference data rates

7. The idea behind EDGE is a new modulation scheme called ———

8. GMSK: ———

9. Modulations used in 3G are ———

10. WWWW: ———

Answers: 1. (b), 2. (a), 3. quadrate phase shift keying, 4. GSM and IS-95 based on CDMA, 5. HSCSD, GPRS, EDGE, and IS-95B, 6. (c), 7. 5GMSK, 8. Gaussian minimum phase shift keying, 9. GMSK and QPSK, 10. Wireless World Wide Web.