Short Guard Interval and multipath effect FAQ

802.11ac had two Guard Interval (GI) options – long GI (0.8µs) and short GI (0.4µs). 802.11ax has three types of GI – the normal GI (0.8 µs), double (1.6 µs) ...

2007年5月9日 — The 802.11n specifies two guard intervals: 400ns (short) and 800ns (long). Support of the 400ns GI is optional for transmitting and receive.

The shortest interval (1/32) provides the lowest protection and the highest data rate; the longest interval (1/4) provides the highest protection but the lowest data rate. Ideally, the guard interval is set to just above the delay spread of the channel.

2020年2月26日 — Since you asked, the guard interval is the tiny amount of time (like 400 nanoseconds) that the transmitter waits between sending one symbol ( ...

2024年5月2日 — A long guard interval means more idle time on the wireless medium, which is wasteful on some other environments. A good Guard Interval helps to ...

2023年9月5日 — Short Guard Interval - When should you use it? My guess is that a longer guard interval is probably more desired in congested networks, right?

Why Guard Interval? Guard Interval is intended to avoid signal loss from multipath effect. In wireless transmission, RF signals reach the receiving antenna by ...

One of the new features in Wi-Fi 6 is a longer guard interval. The guard ... Short - 0.4 microseconds; Long - 0.8 microseconds. Wi-Fi 6 supports 3 guard ...

2021年11月9日 — The 802.11n draft specifies two guard intervals: 400ns (short) and 800ns (long). Support of the 400ns GI is optional for transmit and ...

Short GI(Guard Interval)是802.11n針對802.11a/g所做的改進。射頻芯片在使用OFDM調制方式發送數據時，整個幀是被劃分成不同的數據塊進行發送的，爲了數據傳輸的可靠性 ...