Multipath Mitigation Techniques in Indoor Wireless Communication Networks—A Survey

Abstract

Multipath Fading is a severe phenomenon affecting the performance of radio propagation channels including the indoor radio channel, the propagating medium for wireless local area networks (WLANs).

The relevant propagation parameters of the multipath channel are introduced and explained. A not so recondite nevertheless didactic review of the modelling and characterization studies is done. A survey of the various multipath mitigation techniques is done with particular emphasis on IWLANs supplemented by a listing of the references.

Indexing terms:

• Multipath fading
• Delay spread
• Diversity
• Sectored antenna
• Adaptive antenna array
• Decision feedback equalization (DFE)
• Rake receiver
• Multicarrier modulation (MCM)
• Spread spectrum
• Multiuser detection
• Spread signature CDMA