What's the difference between Mimo and standard Wireless G?
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MIMO (multiple input, multiple output) is an antenna technology for wireless communications in which multiple antennas are used at both the source (transmitter) and the destination (receiver). The antennas at each end of the communications circuit are combined to minimize errors and optimize data speed. MIMO is one of several forms of smart antenna technology, the others being MISO (multiple input, single output) and SIMO (single input, multiple output).\n\nIn conventional wireless communications, a single antenna is used at the source, and another single antenna is used at the destination. In some cases, this gives rise to problems with multipath effects. When an electromagnetic field (EM field) is met with obstructions such as hills, canyons, buildings, and utility wires, the wavefronts are scattered, and thus they take many paths to reach the destination. The late arrival of scattered portions of the signal causes problems such as fading, cut-out (cliff effect), and intermittent reception (picket fencing). In digital communications systems such as wireless Internet, it can cause a reduction in data speed and an increase in the number of errors. The use of two or more antennas, along with the transmission of multiple signals (one for each antenna) at the source and the destination, eliminates the trouble caused by multipath wave propagation, and can even take advantage of this effect.
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From Wikipedia:\n\n"The 802.16 specification applies across a wide swath of RF specrutm, but specification is not the same as permission to use. There is no uniform global licensed spectrum for WiMAX. In the US, the biggest segment available is around 2.5GHz, and is already assigned, primarily to Sprint Nextel. Elsewhere in the world, the most likely bands used will be around 3.5GHz, 2.3/2.5GHz, or 5GHz, with 2.3/2.5 GHz probably being most important in Asia.\n\n"There is some prospect that some of a 700MHz band might be made available for WiMAX use, but it is currently assigned to the analog TV and awaits the complete rollout of HD digital TV before it can become available, likely by 2009. And, in any case, there will be other uses suggested for that spectrum if and when it actually becomes open.\n\n"It seems likely that there will be several variants of 802.16, depending on local regulatory conditions and thus on which spectrum is used. Even if everything but the underlying radio frequencies is the same. WiMAX equipment will not, therefore, be as portable as it might have been. And perhaps even less so than WiFi, whose assigned channels in unlicensed spectrum varies more than a little from jurisdiction to jurisdiction."
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Depends on where you live, if its a densly populated high tech area i.e. Downtown with highrises, all you need is a USB WLAN Network Adpter b/g, preferably with a speed booster.\n\nI have a limit on how much stuff I can download a month...so sometimes I borrow extra bandwidth from the neighbours that way :)\n\nOf course no one can guarantee the presense of "AN OPEN WIRELESS NETWORK" but the better wireless adapter you have, the more chances u get to work with.\n\nNow you can go even further, and invest into a "Yagi" directional antenna (which will cost you ~200$) But you can get the same results with a "Pringles can" and 10$ worth of supplies from RadioShack. With Yagi antenna you can pick up further wireless "hotspots" with good signal amplification, and almost no interference - due to the directional aiming.\nWith Yagi's you can sometimes pick up networks 1.5-2 km away from you - compared to conventional 500feet (166 meters)
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The WiFi band is broken down as follows:\n802.11a = 5Ghz\n802.11b = 2.4Ghz\n802.11g = 2.4Ghz\n\nUnfortunatelly b & g can get serious interference from microwaves, cordless phones, Bluetooth, and other equipment using the same 2.4 GHz.\n\nIn b & g there are 14 overlaping channels or bands.  the best ones to pick are 1 and 11.  Note that they do overlap, and the channels only represent the "center" of the frequency range.  The channels are 5Mhz appart.\n\nThe most interference you will get in a building is power, microwave and cordless phones.\n\nWiFi has been demonstrated to work 150+ miles without interference on a flat surface.\n\nI included a few links for further education.
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An antenna with thick elements has a lower Q, and hence wider bandwidth, than one with thin elements.\n\nThere are also other techniques which can increase bandwdth.  I suggest you search on Google.
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You can find all of the relevant standards for GSM and the WCDMA form of 3G on the 3G Partnership Project website at http://www.3gpp.org/specs/numbering.htm. For understanding selection of the base station, look at the 05.08 spec. under http://www.3gpp.org/ftp/Specs/html-info/05-series.htm. This applies specifically to GSM.\n\nIn general, GSM uses a form of ALOHA called "slotted ALOHA" to govern the random access portion of the network access initiation protocol.\n\nCheck out http://www.ee.surrey.ac.uk/Personal/L.Wood/constellations/tables/gsm.html for some overview on GSM. Also http://kbs.cs.tu-berlin.de/~jutta/gsm/js-intro.html.\n\nGoogle "GSM random access protocol" for more papers on Slotted ALOHA.\n\nGoogle "GSM network registration" or "CDMA network registration" for more on the process of finding and registering to the network.\n\nNote that CDMA comes in multiple forms, WCDMA being the 3G extension of GSM and CDMA 2000 being another variety. There may also be other varieties of CDMA...
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Wireless g is a protocol the Wi-Fi uses.\n\nCheck out http://en.wikipedia.org/wiki/WiFi for more.
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802.11b is running at 2.4 ghz and transmits speed is set to 11 mbps max. while 802.11g is running at 2.4 ghz and transmit speed is set to 54 mbps max.
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Both B and G devices operate in the 2.4GHz frequency band.  However G uses a more advanced modulation technique which gives it higher throughput and better range than B.  A uses the same modulation technique as G but it operates in the 5GHz frequency band.  Higher frequencies don't penetrate obstacles as well, so A has a shorter range.  However in environments where a lot of 2.4GHz devices are in use (wireless phones, microwaves, 802.11b/g), A is preferable.  Also A devices are capable of using more channels so you can use more A devices in an area than B or G devices (not really important for the home user).
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Agree with #1, and will expand.\n\nMost consumer available wireless G receivers can receive wireless B signals, but not necessarily. You need to make sure the wireless router is capable of that. Indication is usually well marked on the equipment.
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IEEE 802.11, the Wi-Fi standard, denotes a set of Wireless LAN/WLAN standards developed by working group 11 of the IEEE LAN/MAN Standards Committee (IEEE 802). The term 802.11x is also used to denote this set of standards and is not to be mistaken for any one of its elements. There is no single 802.11x standard. The term IEEE 802.11 is also used to refer to the original 802.11, which is now sometimes called "802.11legacy." For the application of these standards see Wi-Fi.\n\nThe 802.11 family currently includes six over-the-air modulation techniques that all use the same protocol. The most popular (and prolific) techniques are those defined by the b, a, and g amendments to the original standard; security was originally included and was later enhanced via the 802.11i amendment. 802.11n is another modulation technique that has recently been developed (see D-Link and Linksys websites for existing products). Other standards in the family (c–f, h, j) are service enhancements and extensions or corrections to previous specifications. 802.11b was the first widely accepted wireless networking standard, followed (somewhat counterintuitively) by 802.11a and 802.11g.\n\n802.11b and 802.11g standards use the 2.4 gigahertz (GHz) band, operating (in the United States) under Part 15 of the FCC Rules and Regulations. Because of this choice of frequency band, 802.11b and 802.11g equipment can incur interference from microwave ovens, cordless telephones, Bluetooth devices, and other appliances using this same band. The 802.11a standard uses the 5 GHz band, and is therefore not affected by products operating on the 2.4 GHz band.\n\nWhich part of the radio frequency spectrum may be used varies between countries, with the strictest limitations in the United States. While it is true that in the U.S. 802.11a and g devices may be legally operated without a license, it is not true that 802.11a and g operate in an unlicensed portion of the radio frequency spectrum. Unlicensed (legal) operation of 802.11 a & g is covered under Part 15 of the FCC Rules and Regulations. Frequencies used by channels one (1) through six (6) (802.11b) fall within the range of the 2.4 gigahertz amateur radio band. Licensed amateur radio operators may operate 802.11b/g devices under Part 97 of the FCC Rules and Regulations.
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No, not at all, at least as long as you're getting 18Mbps speeds out of your wireless B. If you're getting slower than that, I would recommend you check into Mimo Wireles G.  It will give you the same speeds on the third floor that you get while in the same room. They come in both 54Mb and 108Mb versions.\n\nI actually get the same speeds upstairs on this computer that I get downstairs from the computer that's plugged directly into the wired router (I have both a wired and a wireless router).  I do have a new MIMO wireless router, though.
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1) Cost of installing wired connections is much more than that of wireless\n\n2) Greater access to the intranet/internet.
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For long distance wireless you need 802.11-PRE-N standard.  This next generation wireless can be used to 700 feet (213m) inside and 1500 feet (457 meters) outside.  See the link below for some early product.  The new standard will be backwards compatible to your existing 802.11b/g access cards -- you just need to update the base station.
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Both 802.11B and 802.11G operate in the 2.4GHz range.  This is an unregulated band and is heavily occupied by many devices including other WLANs and wireless telephones in your neighborhood.  Both 802.11B and B have support for multiple channels, if you haven't already, try using different channels.
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Well if your phone wireless freq. is 2.4Ghz it's going to basically fight over the air space. Most wireless signals run on 2.4ghz. Only one that doesn't is an 'A' network.  So the best solution for you IMO is to just get a new Core-less phone that runs on the 5.8ghz freq. You win because the 5.8 phones are the best ones, and they are not to expense.... As you getting a router on the freq.
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http://bartman1.blogspot.com/ wireless connections explained here