Macrodiversity

Macrodiversity

In wireless communication, "Macrodiversity" means a situation where several receiver antennas and/or transmitter antennas are used for transferring the same signal. The distance between the transmitters is much longer than the wavelength. In a cellular network or a wireless LAN, the antennas are typically situated in different base station or access points.

The aim is to combat fading and to increase the received signal strength in exposed positions in between the base stations or access points.

Examples are:
* CDMA soft handoff.
* UMTS softer handover.
* OFDM based Single Frequency Networks (SFN) and Dynamic Single Frequency Networks (DSFN).
* 802.16e macro diversity handover (MDHO).

See also

* Antenna diversity
* Diversity schemes
* Diversity combining
** Maximum ratio combining
** Selective combining
* Diversity gain


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