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- W2108656456 abstract "We consider channel estimation in amplify-and forward (AF) wireless relay networks (WRNs) when coherent distributed space-time coding is performed at relays. We perform minimum mean-square-error detection at the destination when partial channel state information is available. For channel estimation, we propose to use a semi-blind method based on the expectation maximization (EM) algorithm. Using an iterative channel estimation scheme, we show that a considerable improvement can be achieved in signal detection after a few iterations. We discuss the optimality of the proposed estimation scheme and further propose to improve its performance by combining appropriately the channel estimates based on pilot and data symbols." @default.
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- W2108656456 date "2011-06-20" @default.
- W2108656456 modified "2023-09-26" @default.
- W2108656456 title "EM-based Channel Estimation for Cooperative Relay Networks" @default.
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