Distributed Spatial Multiplexing in a Wireless Network


Boris Rankov and Armin Wittneben


Proceedings of the Asilomar Conference on Signals, Systems, and Computers 2004, (Pacific Grove, CA), pp. 1932 - 1937, Nov. 2004.

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We study a wireless network with one source-destination pair and several relays that forward the data from source to destination in a multi-hop fashion. We compare two schemes: i) The relays operate in an amplify-and-forward (AF) mode and establish a point-to-point MIMO channel between source and destination (MIMO tunnel). ii) The relays operate in a decode-and-forward (DF) mode and the data is transmitted over different network paths (multi-path transmission). We show that the MIMO tunnel with AF relays outperforms the multi-path transmission with DF relays with respect to information rates.


distributed MIMO, amplify-and-forward, decode-and-forward, capacity

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