| Wi-Fi Wireless with MIMO Technology |
What is MIMO and how does it works?
MIMO is an abbreviation for Multiple Input, Multiple Output. MIMO took advantage of radio communications oldest problem, multipath, and turned it into a solution. Multipath occurs when radio signals bounce off objects or structures and take multiple paths to the receiver. The problem with multipath was that the main transmitter signal and its reflection arrive out of phase with each other. That's why certain radio stations fade out in different locations. Researchers discovered that each reflection and each multipath route can be transmitted as a separate channel. To utilize this, multiple antennas are needed and it turns out that the antennas can be very close together, close enough to fit into a Wi-Fi card.
As a result MIMO devices transmit and receive multiple data streams over their multiple antennas. These streams are then bonded together on the Wi-Fi device to create a higher-speed wireless connection. Although the technique of bonding two or more of the 802.11g standard channels can double the speed of 802.11g from 54Mbps to 108Mpbs, this can result in a slowdown in a multiple 802.11g networks due to interference with each other. To avoid this problem MIMO sends one data stream down one channel and another stream down another channel, MIMO simultaneously transmits multiple data streams over the same channel. Even though this still causes signal interference, MIMO receivers use algorithms to grab the proper data streams and bond them in real time, resulting in a much faster throughput with longer range than conventional 802.11 technologies.
MIMO also uses SDM (Spatial Division Multiplexing), another technology which made MIMO backward compatible with 802.11a, 802.11b or 802.11g protocols. Of course, MIMO implementations varies from vendors to vendors. Each of them, however, is backwards-compatible with existing Wi-Fi equipment and with other MIMO vendors. Some MIMO vendors devices have better performance when mixing with other vendors devices. In addition, MIMO Wi-Fi cards have longer extended range due to it very nature of picking up low-strength signals from non-MIMO access points. Courtesy of: www.thechannelinsider.com
*** MIMO technology deserves reseller and system integrator attention. ASI is currently carrying leading Wi-Fi vendors Linksys, D-link, and NetGear MIMO technology.
| Linksys Wireless-G with SRX |
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Linksys SRX devices feature up to a 3x increased wireless network range over standard Wireless-G devices. SRX helps to eliminate "dead spots," enabling users to receive the wireless signal in more places around the house or office. Utilizing multiple antennas, SRX Technology transmits and receives multiple data streams using the same frequency at the same time. This increases the range and coverage of the router. SRX users can experience up to an 8x improvement in the throughput over standard Wireless-G products. |
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As the radio signals travel, they bounce off objects and scatter. The different radio signals reach the SRX receiver at different times, angles, and strengths. The SRX receiver collects the signals and accurately reconstructs them into a readable data stream. This results in a faster network. Courtesy of: www.linksys.com |
The Linksys SRX devices are Wi-Fi certified and backward compatible with 802.11b, 802.11g, and other Linksys SRX products. Mixed wireless environments such as networks containing SRX and 802.11b/g products can operate at its own maximum data rate. SRX products maintain their higher speed and range providing the throughput and quality of service to deliver applications such as VoIP and streaming video.
| ASI SKU | Picture | Linksys Model |
| 34941 |
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WRT54GX
Wireless-G Router w/SRX |
| 35979 |
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WPC54GX
PC Card w/SRX |
| NetGear Wireless MIMO-G RangeMax |
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NetGear's RangeMax™ products are based on “Smart” MIMO technology. Smart MIMO features the combine of MIMO and BeamFlex smart antenna technology pioneered by Video54 to constantly survey home or office environment for physical barriers and interference and regulate the wireless signal to compensate for the intended receiver. For example, if you carry your laptop from the family room to the bedroom, RangeMax’ Smart MIMO automatically senses the change and selects from 127 possible antenna combination for the best path to deliver the fastest and clearest connection. |
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RangeMax Router Performance Advantages:
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| ASI SKU |
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NetGear Model |
| 35667 |
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WPN824
4 Port Wireless Router w/RangeMax |
| 38057 |
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WPN802
Wireless Access Point w/RangeMax |
| 35263 |
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WPN511
Wireless PC Card w/RangeMax |
| 35262 |
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WPN311
Wireless PCI Adapter w/RangeMax |
| 35259 |
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WPN11
Wireless USB 2.0 Adapter w/RangeMax |
| D-Link Super G with MIMO using Smart Antenna Technology |
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"Up to 8x Better Coverage!" |
On the receiving side, the optimal reception combining technology uses advanced signal processing to ensure that the incoming signals in the D-Link Super G with MIMO implementation are reconstructed with the highest combined strength for maximum throughput. Even with non-MIMO enabled wireless products, the D-Link Super G with MIMO solution will give increased performance to current D-Link Xtreme G™ and AirPlus™ G families of products which continue to benefit with the gain of the Super G with MIMO Smart Antenna Technology. In addition, D-Link Super G with MIMO are completely compatible with Wi-Fi standard 802.11b/g protocols. Courtesy of: http://presslink.dlink.com
| ASI SKU | Picture |
D-link Model |
| 33990 |
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Wireless Router w/MIMO |
| 33989 |
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Wireless PC Card w/MIMO |
| 37240 |
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Wireless PCI Adapter w/MIMO |
| 37629 |
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DWL-951 MIMO Laptop Kit ( DI-624M & DWL-G650M) |