Cascaded doubly-selective channel estimation in multi-relay AF OFDM transmissions

  title={Cascaded doubly-selective channel estimation in multi-relay AF OFDM transmissions},
  author={Lo{\"i}c Canonne-Velasquez and Hung Nguyen-Le and Tho Le-Ngoc},
  journal={2012 IEEE International Conference on Communications (ICC)},
This paper studies the problem of channel estimation in amplify-and-forward (AF) multi-relay transmissions over time- and frequency-selective (doubly selective) channels. To avoid two separate channel estimation processes of source-to-relay and relay-to-destination links, a cascaded doubly selective channel model is formulated to characterize the source-to-relay-to-destination (SRD) channel. Time-varying SRD channel gains are projected onto different basis expansion functions to attain… CONTINUE READING


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