Distributed Antenna Arrays versus Cooperative Linear Relaying for Broadband Indoor MIMO Wireless

Authors

Armin Wittneben and Boris Rankov

Reference

International Conference on Electromagnetics in Advanced Applications, ICEAA'03, Torino, Italy, Sept. 2003, (invited paper).

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Abstract

We investigate distributed antenna systems and cooperative relaying to improve the throughput between a MIMO source and a MIMO destination node in a Line-of- Sight dominated indoor environment with poor scattering. We derive the capacity for different traffic patterns and give typical numerical results. The main conclusion is surprising: a simple amplify&forward linear relaying approach outperforms distributed antenna systems in many cases under the considered traffic patterns. On this basis it seems likely, that cooperative relaying will be key in future MIMO enhanced WLANs beyond 5 GHz due to the increasingly poor scattering of the channel.

Keywords

MIMO, distributed antennas, relays, amplify-and-forward, capacity

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