By Ajay R. Mishra
During this booklet, the writer addresses applied sciences which are getting used in rising mobile markets. those comprise GSM/EGPRS and CDMA that are being deployed at a speedy speed, whereas applied sciences resembling UMTS (3G)/ HSPA (3.5G) that have began to discover a position in those excessive development markets, also are thought of. The publication examines different applied sciences together with LTE (3.9G) that have already moved out of analysis labs into the industrial global. 2G-CDMA is prevalent, whereas extra advancements, e.g. CDMA2000 also are discovering recognition within the advertisement area. IMS/Convergence is more and more renowned around the globe; UMA, that's deployed regularly in North the US; and DVB that's gaining world wide recognition, specially in South Asia, are all reviewed.
each one bankruptcy discusses a unique expertise and is established into 3 components. The expertise is tested at an summary point, first explaining what the expertise is after which contemplating the technical positive factors of the know-how. The bankruptcy concludes by means of taking a look at the planning/implementation points of the technology.
- Useful for all mobile pros as offers an summary of the presently deployed applied sciences in mass scale, and the impending applied sciences which are anticipated to make an impression sooner or later, resembling 4th iteration mobile Networks.
- One of the 1st books out there to surround the entire significant mobile applied sciences, in addition to contemplating the layout and implementation point of view.
instant know-how will play a key position in uplifting the economies of the rising international locations globally. Ashok Chandra, instant consultant to executive. of India
Chapter 1 mobile expertise in rising Markets (pages 1–14):
Chapter 2 GSM and EGPRS (pages 15–53):
Chapter three UMTS (pages 55–93):
Chapter four CDMA (pages 95–124):
Chapter five HSPA and LTE (pages 125–151):
Chapter 6 OFDM and All?IP (pages 153–171):
Chapter 7 Broadband instant entry: WLAN, Wi?Fi and WiMAX (pages 173–200):
Chapter eight Convergence and IP Multimedia Sub?System (pages 201–228):
Chapter nine Unlicensed cellular entry (pages 229–244):
Chapter 10 DVB?H (pages 245–263):
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Extra resources for Cellular Technologies for Emerging Markets: 2G, 3G and Beyond
Sometimes, the temperature changes are so large that the transmitted signal gets caught in a duct-like formation in the atmosphere and the signal is not able to reach the receiving antenna. The atmosphere acts like a waveguide and the trapped signal moves into it towards the direction of the duct. To prevent multi-path fading problems, two antennae are installed on the same tower (usually one a few metres below the other), known, respectively, as the ‘main’ and ‘diversity’ antennae. P1: OTA/XYZ P2: ABC c02 BLBK288-Mishra May 18, 2010 8:10 Printer Name: Yet to Come 38 Cellular Technologies for Emerging Markets This is known as ‘space diversity’.
Pico sites are used for indoor coverage. The signal travels a complex but small path from the radio antenna to the mobile station and travels through various terrain and structures – both natural and man-made. When the signal travels from one antenna to another, it looses strength. 5 + 20 log ( f ) + 20 log (d) where f is the frequency in GHz and d is the distance in km. The signal, when travelling from one antenna to another, takes many paths. This includes the reflected signal and the diffracted signal: in the former the direction of propagation does not change while in the latter the direction of propagation changes.
To increase the received signal power, various techniques such as frequency hopping (FH) and equipment enhancements were used. In FH, by using many frequency channels, C/I is improved. The link budget improves due to effects of the FH in the form of frequency and interference diversity. Improvements in the link budget can take place through equipment enhancements as well. The reception of power can be improved at the base station by using receiver diversity while the transmitted power can be increased by using power boosters.
Cellular Technologies for Emerging Markets: 2G, 3G and Beyond by Ajay R. Mishra
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