antenna diversity

Using two or more receiving antennas on a wireless device to eliminate multipath signal distortion. Typically, the signal from the antenna with the least noise (best SNR) is chosen, and the other antenna is ignored. However, there are also methods that use incoming signals from both antennas. It is quite common to see two antennas on 802.11 wireless LAN access points and PC cards. See MIMO, signal-to-noise ratio and multipath.

Antenna Diversity for 802.11
Note the dual antennas on the 802.11b access point (top left) and PC card (bottom) from Alvarion. Antenna diversity is an important feature of the 802.11 specification. (Image courtesy of Alvarion Ltd., www.alvarion.com)

Since this receiver is almost equivalent to using a rake receiver with 2N rake fingers, it is advantageous to use a single rake receiver with antenna diversity.

A link-level simulator of the cdma2000 reverse-link physical layer by Wyatt-Millington R. / Journal of Research of the National Institute of Standards and Technology

Diversity Antennas: Antenna diversity is a technique by which two or more antennas are used on a wireless device in order to null multipath signal distortion.

Huge Application Potential for Smart Antenna Technologies by Business Wire

It is compatible with MIMO and antenna diversity configurations using a1x2 architecture.

Jacket Micro Devices Announces First Mobile WiMAX Front End Module by Business Wire

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