Podcast
Questions and Answers
What is the frequency band used by D-AMPS?
What is the frequency band used by D-AMPS?
- 700 MHz and 1100 MHz
- 800 MHz and 900 MHz (correct)
- 900 MHz and 1900 MHz
- 1000 MHz and 2000 MHz
What was the bandwidth of the Early AMPS in the 800 MHz band?
What was the bandwidth of the Early AMPS in the 800 MHz band?
- 30 kHz (correct)
- 20 kHz
- 40 kHz
- 50 kHz
What is the original name of GSM?
What is the original name of GSM?
- Global System for Mobile
- General System of Mobile
- Group of Special Mobile (correct)
- General System for Mobile
What was the signaling rate of the Early AMPS?
What was the signaling rate of the Early AMPS?
In which year was the first GSM deployed?
In which year was the first GSM deployed?
What is the modulation technique used by GSM?
What is the modulation technique used by GSM?
What was the name given to the system since 1976?
What was the name given to the system since 1976?
What was the frequency band used by TACS?
What was the frequency band used by TACS?
What is the contribution of GSM to Nigeria's GDP in Q4 of 2017?
What is the contribution of GSM to Nigeria's GDP in Q4 of 2017?
When did GSM penetration start in Nigeria?
When did GSM penetration start in Nigeria?
What was a major problem associated with the 1G system?
What was a major problem associated with the 1G system?
What is the multiple access technique used by GSM?
What is the multiple access technique used by GSM?
What was the approximate cost of a cell phone using the 1G system?
What was the approximate cost of a cell phone using the 1G system?
What was the air interface protocol used by IS-54 and IS-136?
What was the air interface protocol used by IS-54 and IS-136?
What is the bandwidth of each carrier in GSM?
What is the bandwidth of each carrier in GSM?
What was the result of digitally compressing the voice data in 2G systems?
What was the result of digitally compressing the voice data in 2G systems?
What is the topic of Week 4 in the course?
What is the topic of Week 4 in the course?
What is the focus of Week 9 in the course?
What is the focus of Week 9 in the course?
In which week is the topic of GSM link budget and coverage planning covered?
In which week is the topic of GSM link budget and coverage planning covered?
What is the primary objective of this course?
What is the primary objective of this course?
In which week is the topic of Backhauling systems, Transmission and Network Planning covered?
In which week is the topic of Backhauling systems, Transmission and Network Planning covered?
What is the duration of the topic of Antennas and Radio Wave Propagation in the course?
What is the duration of the topic of Antennas and Radio Wave Propagation in the course?
In which week is the Mid Term Break and Test 1 scheduled?
In which week is the Mid Term Break and Test 1 scheduled?
What is the topic of Week 11 in the course?
What is the topic of Week 11 in the course?
What is the main driver towards the next generation systems?
What is the main driver towards the next generation systems?
What is the data rate of GSM in 2G technology?
What is the data rate of GSM in 2G technology?
What is the bandwidth of CDMA 2000 1X in 2.5G technology?
What is the bandwidth of CDMA 2000 1X in 2.5G technology?
What is the data rate of WCDMA in 3G technology?
What is the data rate of WCDMA in 3G technology?
What is the bandwidth of LTE in 4G technology?
What is the bandwidth of LTE in 4G technology?
What is the switching type of IS-95 in 2G technology?
What is the switching type of IS-95 in 2G technology?
What is the data rate of HSPA in 3.5G and 3.75G technologies?
What is the data rate of HSPA in 3.5G and 3.75G technologies?
What is the mobile station (MS) in mobile communication?
What is the mobile station (MS) in mobile communication?
What is the title of Onyedibe's 2005 publication?
What is the title of Onyedibe's 2005 publication?
What is the title of the 2016 publication by ITU?
What is the title of the 2016 publication by ITU?
What is the ISBN of Mishra's 2007 publication?
What is the ISBN of Mishra's 2007 publication?
What is the title of the 2015 publication by Vinicius C.M.Borges et al?
What is the title of the 2015 publication by Vinicius C.M.Borges et al?
What is the title of the 2015 publication by 5GPPP?
What is the title of the 2015 publication by 5GPPP?
Who is the author of the publication 'Wireless Communications Principle and Practice'?
Who is the author of the publication 'Wireless Communications Principle and Practice'?
What is the title of the publication by Nisha Panwar et al?
What is the title of the publication by Nisha Panwar et al?
What is the title of the publication by Schiller.J?
What is the title of the publication by Schiller.J?
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Study Notes
Course Overview
- The course covers the principles and techniques of digital communication systems, with an emphasis on mobile cellular networks.
1G Systems
- Early AMPS (Advanced Mobile Phone Systems) used FDMA in the 800 MHz band at a bandwidth of 30 kHz.
- AMPS concentrated on speech services and were based on analog transmission.
- The system had capacity and security-related problems.
Problems Associated with 1G Systems
- Compatibility issues: All deployed systems were incompatible.
- Standard: Each network had its own standard.
- Roaming: Roaming was impossible, and most countries had only one operator.
- Size and Charging: 1980s technology couldn't make cell phones small and affordable.
- Cost: The systems were very expensive, around $1000.
2G Systems
- 2G systems use digital transmission technology, introduced in the 1990s.
- Examples of 2G systems include GSM, IS-54, IS-95, IS-136, PDC, and PHS.
- GSM (Global Systems for Mobile Communications) was developed in Europe in 1983.
- GSM systems operate at various frequency bands, including 900 MHz/1800 MHz.
GSM in Nigeria
- GSM was introduced in Nigeria in August 2001.
- GSM systems operate in various frequencies and use the time division multiple access (TDMA) technique to multiplex up to 8 calls per channel.
- GSM contributes around 8.86% to Nigeria's GDP.
Importance of GSM
- GSM is important to study because it offers various services, including prepaid/postpaid calling, voice, mail, SMS, and call waiting.
Migration Paths from 1G to 3G
- The migration from 1G to 3G involved the development of intermediate technologies, such as 2.5G and 3.5G.
Mobile Standards and Properties
- Various mobile standards, including GSM, IS-136, IS-95, HSCSD, GPRS, EDGE, CDMA 2000, WCDMA, HSPA, and LTE, have different data rates, bandwidths, and switching techniques.
Terms Associated with Mobile Communication
- Mobile station (MS): A radio transceiver attached to a network, used to make and receive calls.
- ITU (International Telecommunication Union): A specialized agency of the United Nations that coordinates global telecommunication networks and services.
- NCC (Nigerian Communications Commission): The regulatory body for the Nigerian telecommunications industry.
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