(PhysOrg.com) -- If a plan to build new 4G mobile phone base stations in the US goes ahead, engineers say GPS satellite navigation systems will be seriously jammed and huge areas of the country will become GPS dead zones.
Your monthly cell phone bill is way too expensive. No, it's not the fees or taxes or even text messages that are leaching your wallet. It's your voice plan.
Telecom
Mar 17, 2010
1
0
(PhysOrg.com) -- In today's world, we want our information to travel faster. This is especially true as smart phones take over and we become used to using smaller devices to accomplish more while we are away from home. Verizon ...
Sri Lanka's government announced Monday it would take a 25 percent stake in a joint venture with Google designed to deliver a high-speed Internet service powered by balloons and that tests would begin this month.
Telecom
Feb 1, 2016
0
39
Due to the increase in smartphone video applications, mobile video traffic is rising significantly. New research has shown how videos can be better transmitted over wireless links such as Wi-Fi and 4G.
Telecom
Jul 16, 2014
0
0
Apple has asked a federal judge to bar US sales of Samsung smartphones and tablet computers in the blockbuster patent case involving the two electronics giants.
Business
Dec 27, 2013
19
0
Professor Ravi Silva of the University of Surrey's Advanced Technology Institute has identified the range of combinations of organic and inorganic materials that will underpin new 4th generation solar cell technology – ...
Energy & Green Tech
Jul 29, 2013
1
0
(Phys.org)—Two professors at the University of California, Riverside Bourns College of Engineering have developed a new method that doubles the efficiency of wireless networks and could have a large impact on the mobile ...
Telecom
Nov 13, 2012
0
0
The new Kindle Fire HD may not stir you to pass along your old iPad as a hand-me-down. But if you own an earlier small tablet running on Android or another operating system, or even last year's original Kindle Fire, you'll ...
Consumer & Gadgets
Sep 25, 2012
0
0
Apple prevailed Friday at a US trade panel in a patent infringement complaint filed by South Korea's Samsung over wireless communication technology for the iPhone and other Apple devices.
Business
Sep 14, 2012
7
0
In telecommunications, 4G is the fourth generation of cellular wireless standards. It is a successor to the 3G and 2G families of standards. In 2009, the ITU-R organization specified the IMT-Advanced (International Mobile Telecommunications Advanced) requirements for 4G standards, setting peak speed requirements for 4G service at 100 Mbit/s for high mobility communication (such as from trains and cars) and 1 Gbit/s for low mobility communication (such as pedestrians and stationary users).
A 4G system is expected to provide a comprehensive and secure all-IP based mobile broadband solution to laptop computer wireless modems, smartphones, and other mobile devices. Facilities such as ultra-broadband Internet access, IP telephony, gaming services, and streamed multimedia may be provided to users.
IMT-Advanced compliant versions of LTE and WiMAX are under development and called "LTE Advanced" and "WirelessMAN-Advanced" respectively. ITU has decided that LTE Advanced and WirelessMAN-Advanced should be accorded the official designation of IMT-Advanced. On December 6, 2010, ITU recognized that current versions of LTE, WiMax and other evolved 3G technologies that do not fulfill "IMT-Advanced" requirements could nevertheless be considered "4G", provided they represent forerunners to IMT-Advanced and "a substantial level of improvement in performance and capabilities with respect to the initial third generation systems now deployed."
As seen below, in all suggestions for 4G, the CDMA spread spectrum radio technology used in 3G systems and IS-95 is abandoned and replaced by OFDMA and other frequency-domain equalization schemes. This is combined with MIMO (Multiple In Multiple Out), e.g., multiple antennas, dynamic channel allocation and channel-dependent scheduling.
This text uses material from Wikipedia, licensed under CC BY-SA
