What does antenna diversity do?
Antenna diversity, also known as space diversity or spatial diversity, is any one of several wireless diversity schemes that uses two or more antennas to improve the quality and reliability of a wireless link.
What is antenna switch diversity?
One of the ways to exploit the multiple antenna configurations is to use antenna switching diversity. Antenna switching diversity is used in wireless systems to combat the effect of fading, as we can combine multiple independent copies of the same signal into a total signal with high quality.
What is receiver antenna diversity?
A diversity receiver has two antennas for receiving the one signal. If the signal from one antenna has interference, the receiver then uses the signal from the other antenna. A distinction is made between antenna diversity and true diversity. Receivers with no diversity are called non-diversity receivers.
What is multipath RF?
Multipath interference occurs when an RF signal from a transmitter arrives at a receiver via two or more routes. Typically there is a direct path plus a number of indirect paths caused by reflections. Walls, people, set pieces, and other objects in a room can cause reflections indoor.
Should I enable antenna diversity?
Antenna diversity is enabled by default (set to “auto”) per wireless interface. When using the internal antennas, Proxim recommends leaving antenna diversity enabled. However, you may disable antenna diversity by manually selecting which antenna to use for each wireless interface through the Command Line Interface.
What are the different types of antenna diversity?
There are various antenna diversity type such as space diversity, frequency diversity, time diversity, polarization diversity, pattern diversity, directional diversity, transmit-receive diversity as described below.
What is selective fading?
Selective fading or frequency selective fading is a radio propagation anomaly caused by partial cancellation of a radio signal by itself — the signal arrives at the receiver by two different paths, and at least one of the paths is changing (lengthening or shortening).
Which one is most commonly used diversity technique?
Spatial Diversity is the most widely used diversity technique. In this technique multiple antennas are strategically spaced and connected to common receiving system.
What is antenna diversity in Aironet?
Cisco Systems enables antenna diversity by default on its Aironet access point products. The access point samples the radio signal from two integrated antenna ports and chooses a preferred antenna. This diversity creates robustness where there is multipath distortion.
How far apart should antennas be spaced to support diversity?
The 2.4 GHz wavelength is approximately 4.92 inches. Therefore, to support diversity on a 2.4 GHz radio with two separate antennas, the antennas should be spaced approximately 5 inches apart.
What is signal diversity and why is it important?
In brief, general terms, diversity is a mechanism to reduce the chance of 1) multipath (one or more reflected waves interfering with the desired signal) and 2) nulls (a point in space where the phasing of two signals negates one signal with the other).
Why are there two antenna ports on the access point?
Note: The two antenna ports on the access point are designed for spatial diversity, and the radio only checks the other antenna when it encounters errors. The clients on the right side of the course have difficulty with connections.