comicsofme: 4gs

Introducing the Apple iPhone 4S, the long awaited and eagerly anticipated successor to theiPhone 4.

The Apple 4S is finally upon us. After the myriad of rumors, fake reviews, and leaked emails we finally have the lowdown on what to expect from the next outing of iPhone goodness.

While the design of the iPhone 4S remains mostly unchanged, (iPhone 4 users can breathe a collective sigh of relief over the new antenna design) keeping the same screen real estate as the the iPhone 4, it’s what’s under the hood and the new features sprinkled throughout that are of note, namely iCloud support (which will allow user to back-up docs, media, and photos via Photo Stream), and the eagerly awaited iOS 5. Apple also introduced a sophisticated voice control feature and mini personal assistant named Siri, which will allow you to talk to your phone, ask it questions, send emails/reminders, and other tasks like informing you on what the weather forecast for the day will be.

iPhone 4S Pictures

The iPhone 4S will also feature, as expected, a new dual-core A5 processor, similar to the one used in the iPad 2, which undoubtedly will help a lot with gaming.

The camera on the 4S has also received a face-lift in the form of an 8MP camera, offering 60 percent more pixels than the iPhone 4 and shoots 1.3 faster with a high-end IR filter for increased uniformity. Connection wise the iPhone 4S will features HSPA+, but sadly no support for 4G LTE.

Pre-orders for the 4S will begin October 7th, with a release date scheduled for October 14th. Pricing for the new iPhone 4S is set at $199 for 16GB, $299 for 32GB, and $399 for 64GB with 2 year contract.

And finally, joining AT&T and Verizon to the exclusive list of iPhone carries is Sprint, who will now be able to offer the iPhone 4S to its customers.

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.

4G technologies such as mobile WiMAX and first-release Long term evolution (LTE) have been on the market since 2006 and 2009 respectively. The ITU announced in December 2010 that WiMax, LTE, and HSPA+ are 4G technologies.

4gs

IMT-Advanced compliant versions of the above two standards 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 announced that current versions of LTE, WiMax and other evolved 3G technologies that do not fulfill "IMT-Advanced" requirements could 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.

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