COMPARISON FHSS and DSSS (Spread Spectrum Technology)

by : Abas Ali Pangera in journal.amikom.ac.id

Spread spectrum communication is a technique that is characterized by wide bandwidth and low peak power. Spread spectrum communications using a variety of modulation techniques in wireless LAN and has many advantages when compared to its predecessor, the narrow band communications. The signals spread spectrum similar to the noise (noise), difficult to detect, and even more difficult to arrest or didemodulasi without using the right tool. Jamming and interference has a lesser effect on spread spectrum communication when compared to narrow band communication. Because of these reasons, spread spectrum technology has long been the leading technology in the military.

Continue Reading...

Face "Mudik" Prepare Esia GoGo Number 1.7 Million


Esia has prepared 1.7 million number Esia GoGo forth to face the surge in customers Esia holiday 2009 season.

Esia GoGo readiness was in line with the increased network capacity Esia 2-fold for both sms and voice. It is expected that this capacity will provide convenience for customers who will be going home Esia so that they can still use the phone at home Esianya.


"We are preparing specifically Esia GoGo this year because the number of cities has increased dilayanan Esia, namely in 73 cities. Most also had to reach small towns like Cilacap forth goals, Brebes, Klaten in Central Java and Wonogiri or Binjai, Siantar, Batusangkar and Bukittinggi in Sumatra, "said Director of Corporate Services BTEL Rachmat Junaidi, through its official statement on Thursday (17/9/2009).

GoGo Esia Bakrie Telecom is a service to customers Esia order can still use the number Esianya even outside the city or area code. Due to the fixed wireless access licenses that have been, Esia services can only be used in one area code. But with the Esia Esia GoGo then the customer can still use the phone even outside the city. It's easy, simply SMS to 6060 or call into the # 6060.

In addition Esia also provides insurance protection guarantees valued at Rp1 million to customers Esia GoGo the unfortunate.

While the network readiness also been prepared well in advance. According to Grace, the capacity of Bakrie Telecom has been increased 2-fold of normal capacity, both for voice and SMS. For that Esia also has prepared a special team, both on the technical and customer service that will serve 24 hours in turn.

source : okezone.com
Continue Reading...

China Shoots GPS Satellite Into Orbit

Seeking to create an alternative to the United States' global positioning system, China is busy building its own GPS network. On Wednesday, it launched the second satellite designed to support the system. It will need 30 more to complete the system by 2015.


China fired into orbit Wednesday its second satellite in a program to build an alternative to the global positioning system based on U.S. satellites.

The geostationary satellite is one of a series being slung into space to form the Beidou, or "Compass," navigation system, the official Xinhua News Agency said, calling the system a "crucial part of the country's space infrastructure."

Home-Grown GPS
The system is touted by China as an alternative to the U.S. satellite GPS More about global positioning system network, the dominant positioning system, although it isn't clear how far China has progressed in bringing the project to fruition.

Although the U.S. government says China has already launched at least five navigation satellites, Xinhua said Wednesday's launch, which was fired off at 00:16 a.m. (1616 GMT) from the southwestern Xichang launching center using a Long March 3C rocket, was only the second directly tied to the global navigation system.

It said China's current satellite navigation system only covers China and adjacent regions.

The launch comes almost exactly two years after the first Beidou satellite was placed into orbit, Xinhua said.

Competition and Cooperation
Xinhua said 30 more satellites would be needed before 2015 to complete the system, with 10 going up by the end of next year.

China has been both a competitor and a partner in global positioning system efforts. While seeking to operate independently of the U.S. system, it has invested in the European Union's Galileo satellite navigation system and is talking about participating in Russia's GLONASS system.

Source : http://www.technewsworld.com/story/mobile-tech/
Continue Reading...

Cisco Wireless Phone

Enhance the user experience and personal freedom with support for Bluetooth. Increase business continuity by taking advantage of a new ruggedized industrial design. The Cisco Unified Wireless IP Phone 7925G for mobile professionals extends
the functionality of the existing Cisco Unified Wireless IP Phone 7921G with the following new features:

* Support for Bluetooth v2.0 headset profiles gives you more freedom
* Hermetically sealed phone/display is IP54 rated, protects against dust, liquids, and moist wipes, and is ideal for deployment in more demanding environments
* Ruggedized industrial design is compliant with military 810F standard and includes a rubber casing to shield the phone from damage caused by drops and shocks
* A more compact form factor gives you an IP phone that is easier to hold


Source : http://www.cisco.com
Continue Reading...

The Driving Force Behind the Open Source Mobile Movement

Device and hardware makers are discovering the flexibility of the Linux stack as the foundation of a platform for mobile applications that bring value to the wares they want to sell. Complications exist, but manufacturers are working through them to further drive the adoption of the Linux stack.

In a sagging economy, doing business as usual is rarely prudent and usually disastrous. Companies often must change the course of strategies, or in some cases accelerate them.

After a spate of business meetings during the marathon that is Mobile World Congress, one takeaway is the acceleration in the mobile handset market of operators moving to open source More about open source software-based devices. Two specific device types are driving the increased adoption of open source software stacks: smartphones and netbooks, with many operators and OxMs also forming plans for Linux-based mobile Internet devices (MIDs) in the coming year.

Projections for Growth

The trend is more than anecdotal. In-Stat notes that "smartphones with Linux OS (including Android) will see the highest growth and the second highest volume behind Symbian More about Symbian. Linux OS will outpace Windows Mobile, RIM and iPhone OS X."

Meanwhile, industry analysts' projections for netbook (running either Linux or variants of Windows) sales growth rates in 2009 range from 50 percent to 128 percent. Many of these are being offered through operators with (profitable) data plans underwriting their already low costs. MIDs are also starting to appear on the horizon, fitting squarely between the smartphone and netbook.

Indeed, operators are viewing Linux as a strategic terminal platform on which they can build new revenue sources, new business models and a new customer base, regardless of device type. A Linux-based terminal platform offers them significant benefits over the legacy and proprietary platforms that formed the foundations of yesterday's mobile devices. Based on an open source license, these platforms give operators a significantly greater ability to customize, tailor and brand the platform for their network. And, as the base for various open source consortia including the LiMo Foundation, Open Handset Alliance and Moblin, these platforms offer operators the power to influence their development and direction. Many operators are reviewing where to put their investments, some are outlining plans for a single platform while others continue to work with multiple platforms.
Stacking the Deck

Operators, OEMs and semiconductor manufacturers are now taking these open platforms and creating reference designs that will accelerate product development. Operators are integrating signature applications and other legacy assets with the open source platforms to create an operator-specific version that will be provided to OxMs as the starting point for final product development. OxMs are rapidly building competency in these open platforms to be better prepared to quickly deliver mobile devices for the operators. Semiconductor manufactures are also investing to pre-optimize their hardware platforms with these open source stacks to reduce early development cycles, differentiate their hardware platforms and accelerate hardware adoption.

This cross-value chain collaboration points to a new form of industry cooperation enabled by open source. By starting with a baseline open source software stack and a pre-optimized hardware-software platform, operators and their suppliers are innovating on new mobile devices at more effective levels -- the much vaunted value line shift higher up the stack that has long been promised by open source but rarely realized. By not having to worry about first enabling a video stream or building support for 14 Bluetooth More about Bluetooth profiles, when utilizing the community's stack investments, the ecosystem can now focus on developing new consumer features, services and advanced user experiences that will drive chip, device and subscriber sales.

Getting to the point where all the benefits are realized is proving to be more of a challenge than some have anticipated for several reasons:

* Open source mobile software stacks are relatively new, and expertise is not as widely available as with older, proprietary stacks (but is rapidly improving). Indeed, who will develop these reference stacks is a major question for operators -- are they in the software development business themselves?
* Open source license provisions and how they affect open source software's integration with an operator's signature applications must also be addressed.
* Discovering ways to speed the testing process for the integrated stack without sacrificing quality may be the key to achieving development project reduction goals.
* The specter of fragmentation haunts the reference stack architecture, as no one wants to find themselves alone on a branch two years from now with no inexpensive way to rejoin the mainstream.

Despite these issues, operators are clearly moving full steam ahead with a variety of open source projects, including Android, LiMo and Moblin. The opportunity to quickly get a differentiated mobile device to market that will drive average revenue per user and subscriber growth is too alluring to ignore. Operators are driving the ecosystem to make it happen -- look for the mobile devices soon!

Source : http://www.technewsworld.com
Continue Reading...

A Week of Memory, Malware, MacBooks and Marble

It's rumored that carrier Orange is gearing up to sell MacBooks at a discount in return for data service plans. What sort of MacBooks might they be talking about -- big, shiny MacBook Pros, or smaller, as-yet-nonexistent Mac netbooks? Also making news this week was a bit of malware disguising itself as a Mac application. As always, be careful what you download and install.

It's been a relatively quiet week for the Apple-focused blogosphere. Apple (Nasdaq: AAPL) More about Apple did announce the dates for its Worldwide Developers Conference (WWDC), which is set for June 8-12 in San Francisco. WWDC just so happens to the be the venue in which Apple is widely expected to release its next version of Mac OS X -- "Snow Leopard" -- which may be prettier than expected.


Meanwhile, Apple quietly added an option to double the memory in its 15-inch MacBook Pros, a security company caught some nasty OS X malware on video, and an international cellular service provider is rumored to be planning to sell a highly subsidized MacBook tied to a data service plan. Interesting stuff indeed.

Don't Touch My Scroll Bar!

As for Snow Leopard, AppleInsider.com reported that Apple may be working on a new user interface to Mac OS X, which may forgo the platinum (silvery white) color scheme in favor a darker, more charcoal-like scheme going by the name "marble."

"Details were sparse, but speculation pointed to the adoption of the smoother iTunes-style scrollbars and a move towards a darker chrome motif for application windows alongside an inverted menubar with light text on a dark background," AppleInsider.com reported.

Comments are all over the map, but at least a few expressed concern over Apple's bright blue scroll bars.

"I would just HATE for them to remove the blue glass scroll bars and replace them with some ugly Linux style like they have in iTunes. I'm glad it's just speculation. For the UI changes, I'm expecting it to be like iWork.com and Safari 4," commented macosxp on the AppleInsider.com post.
8 GB in a 15-inch MacBook Pro?

Moving on to the here and now, Apple started offering an 8 GB memory upgrade kit for its latest 15-inch MacBook Pros (MBPs). The 17-inch MBP already has a build-to-order option to jump up to 8 GB of memory. The upgrade kit is available on the Apple Store's set of memory pages. The kit is 2 1066 MHz DDR3 4GB SO-DIMMs and costs US$1,200.

9to5mac.com reported, however, that OWC has the same kit for $719, while Amazon.com (Nasdaq: AMZN) More about Amazon.com has it for just over $1,000.

"That's cool, but it's not like my 4 gig MBP is slow or anything," Wei-o commented on 9to5mac.com. Good point: Who really needs 8 GB of memory in a 15-inch MacBook form factor, anyway?

"Pro apps like Photoshop and Final Cut Pro suck lots of memory -- the more you have, the better you are," Sven Rafferty, founder of hyperSven and SvenOnTech.com blogger, told MacNewsWorld.

"Since many pros are now doing video on the road and graphic work on 'desktop replacements,' this option makes sense. Not everyone wants to carry a huge 17-inch around -- I didn't -- and opt for the smaller-but-just-right 15-inch MacBook Pro. I think Apple is wise to offer this feature to its Pro community," Rafferty explained.

"It'll further prove to videographers and photographers that the only computer they need is a Mac," he added.
Malware Caught on Tape

Ars Technica noticed a blog post by security firm Sophos that provided a video of a new version of the RSPlug OS X trojan, OSX.RSPlug.F, masquerading as a media player application with a convincing yet fake Web site.

Basically, to get the malware, you have to download a fake HDTV/DTV program called "MacCinema" and/or an HDTV app called "HDTV Player."

"The website in the video looks legitimate; it appears to be a pretty close copy (right down to the box art) of the product page for a legitimate application with the same name," Ars Technica reported, noting that the real product is actually for Windows-based machines.

So what does the trojan do?

The RSPlug-F Trojan horse changes DNS Settings on Mac computers, meaning users may find they are taken to bogus Web sites which may attempt to steal personal information, display revenue-generating adverts, or install further malware. (By the way, if you visit the Web site from a Windows computer, it will serve up a malicious Windows executable from the Zlob family of malware rather than the RSPlug-F Mac OS X Trojan horse.)

"You should not be allowed to use a computer until you demonstrate that you can refrain from installing random sh*t from random websites because they told you to," commented mrsteveman1.

This trick, however, has very likely convinced at least a few users.

"Web-based attacks like this are the most common type of malware-delivery mechanism we see these days," Graham Cluley, a senior technology consultant for Sophos More about Sophos, told MacNewsWorld.

"A lot are in the form of SQL injection attacks, but we do also see social engineering attacks like this used to install financially-motivated malicious code," he explained. Cluley posted the original video on his Sophos blog.

How, then, is a Mac user able to determine the fake from the legit?

"It's really not possible for the average guy in the street to spot a fake site from a legit site. Furthermore, most of the infected sites we encounter are actually legitimate sites that have been hacked and had malicious code planted on them," Cluley said.

"We see around about 20,000 new legitimate Web sites every day that are hosting malicious code -- presumably without the knowledge of the Web site owner. The best thing to do is make sure you have proper security in place, which means patches for your OS, plugins and applications, firewalls, and anti-virus software," he noted.

"It's worth stressing that Mac malware is much less frequently encountered than Windows -- but it's clear that some gangs are very happy to take advantage of what they see as a smaller but less well defended group of potential victims," he added.
Cheap MacBooks on the Way?

While some Apple lovers are pining away for a Mac netbook, looks like one international mobile phone carrier isn't bothering to wait around. According to Macnn.com -- itself sourcing a report in Mobile, a UK-based magazine -- carrier Orange may be planning to sell MacBooks at a significant discount in return for a two-year mobile data contract.

If completed, the deal would represent the first time a MacBook has been offered alongside cellular service, Macnn.com reported, noting that while other computer manufacturers have provided PCs to phone carriers, Apple has limited its cellular deals to the iPhone.

"If they subsidize a MacBook PRO you can count me IN!!!" commented Rolando_jose on the Macnn.com post.

Of course, the whole deal, assuming it's legit, might simply be a way to pave the way for Orange selling a Mac netbook or tablet some time in the future. So, can we look forward to a new future where laptops are subsidized by mobile phone carriers, similar to our cell phones?

"Aside from netbooks and laptops, carriers want more revenue from the investments that they made in their new data infrastructure. This is true of 3G More about 3G and will no doubt be a fixture when 4G networks are more prevalent," William Ho, research director of Wireless Services for Current Analysis More about Current Analysis, told MacNewsWorld.

"The data use will not be in the laptop and netbook domain alone as new consumer electronics devices will have embedded cellular modules with wholesale data agreements that do not look like any data plan to the end user -- a great example of this is the Kindle," he added.


Source : http://www.technewsworld.com
Continue Reading...
 

CBox

Followers

Subscribe to Information Technology

Enter your email address:

Delivered by FeedBurner

Powered by FeedBurner

Information Technology Copyright © 2008 Designed by Ipietoon Powered by STMIK AMIKOM Yogyakarta