Wednesday, December 15, 2010
Weak current College】 【wireless signal which factors】.
Wireless signal transmission is mainly affected by several factors:
1, domestic space are more crowded, not enough open space, in which the walls in the room is the main obstacle. Because wireless local area network using a wireless microwave band. The biggest feature of microwave is almost linear transmission, diffraction ability is very weak, and thus live in barrier behind wireless receiver is receiving a very weak signal, or have not received a signal;
2, physical obstacles, not only block the microwave wireless signal, it also put the electromagnetic energy to generate power absorbed, flow stream out, so no wireless signals in a family environment, the biggest obstacle is metal objects are reinforced by the floor, the direction of the signal virtually no penetration. To be able to penetrate the signal is very weak.
3, IEEE802.11b/g standard frequency bands, for 2.4GHz industry many devices just work in the frequency bands such as microwave ovens, Bluetooth devices, cordless phones, refrigerators, etc. If there is a strong magnetic field exists, then the wireless network will be affected;
4. If in a wireless environment exists multiple wireless devices may also exist channel conflict, wireless signal crosstalk problems;
5. distance wireless equipment and cable lines within 100 metres of the radio tower, welder, trams or high voltage power transformers and other strong signal interference, or it may be on a wireless signal or equipment generates strong interference;
6, signal is the outdoor weather conditions on the transmission of wireless signals a great impact, and if the weather is relatively somber leiyutian or when comparing the powerful signal attenuation, Sunny Lane, signal transmission can be farther distance;
How to improve the quality of the signal transmission:
1. Select a wireless AP best placement locations. This position requires a point a, the location should be on the high side, so that in a direction following radiation, the Highlands to reduce obstacles stand in the way that minimise signal gaps; b, location point selection should be to make signals to as little as possible, preferably through partition room wireless clients and wireless access point between Visual;
2. modify the channels, reduce wireless crosstalk. Note: set up your own wireless signal transmission channel to ensure it's wireless signal channel 5 above;
3, reduce home electrical interference and ensure signal through. Place the wireless AP is as far away as possible from such equipment;
4. If the wireless AP is detachable antenna, you can replace the antenna to achieve the aim of enhancing the wireless signal.
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