(Editor's note: This popular feature article, which was first published May 2007, is being republished in response to its great popularity and the likelihood that the 802.11n spec will be ratified in ...

Backward compatibility with the legacy devices (IEEE 802.11b/g) The typical 802.11n network consists of legacy 802.11b/g enabled systems and new 802.11n enabled MIMO-OFDM systems. The channel access ...

OFDM调制技术是将高速率的数据流调制成多个较低速率的子数据流，再通过已划分为多个子载体的物理信道进行通讯，从而减少ISI（码间干扰）机会。 MIMO（多入多出）技术是在链路的发送端和接收端都采用多副天线，将多径传播变为有利因素，从而在不增加信道 ...

WiFi网络发展至今，已经可以说是达到了一个非常不错的水准。今天在市面上能见到的先进无线局域网设备普遍都能支持802.11n标准，达到300Mbps的无线传输速率对我们来说已经是非常简单的事情。 我们知道，11n标准最高可支持高达600Mbps的无线传输速率，也就是说 ...

Wi-Fi's biggest advantage is that it provides mobility and coverage. But early versions of Wi-Fi did not achieve data rates on par with the wireline network. Recent advancements in wireless research ...

曾经有很多朋友问我，他们在买无线路由的时候，都会看到有关于802.11a、802.11b、802.11g等一些标示，虽然知道这是有关无线路由传输速率的协议，但是对于这些协议却鲜有了解。尤其是今年又将是11n转正的关键时期，所以今天我们就从最初开始，慢慢的来了解 ...

戴尔宣布推出Dell无线1500草案 802.11n双波段无线迷你网卡。这款无线网卡在所有戴尔XPS和Inspiron系列笔记本能够识别。 在接入支持802.11n标准草案的Intensi-fi技术路由器之后，Dell这款无线网卡的传输速率可以达到270Mbps，相比802.11g最大只能支持54 Mbps。这款无线网卡还 ...

The antennas used by wireless devices have a major impact on WLAN coverage, security and performance. This becomes increasingly evident in new draft 802.11n access points (APs), which use multiple ...

In theory, 802.11n can zip by your 100Mbps Fast Ethernet at a real-world 160Mbps, but the practice it's usually much slower. No, the Wi-FI vendors aren't lying; the problem is that you have to set 802 ...

On numerous occasions, and in our wireless troubleshooting tutorial, we've noted that turning off wireless security (encryption) or switching security protocols (from WPA2 to WEP or vice versa, etc.) ...

When 802.11b first started getting popular in late 2000, no one imagined that it would still be the most dominant standard 6 years later and continue to dictate the design of the latest wireless LAN ...