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In this paper, we propose two ad-hoc, yet efficient, power allocation strategies for a decentralized distributed space-time block coding (Dis-STBC) system where knowledge about the channel state information (CSI) is not available at the transmitter(s). The first is an open-loop strategy which requires no control signaling; the second is a feedback-assisted strategy which requires some control signaling,...
In this paper, focusing on multihop decode-and- forward cooperative networks, a hop-by-hop routing strategy is designed to optimize the end-to-end outage performance when only knowledge about the mean channel state information (CSI) is available. In particular, by only utilizing the mean CSI at the current hop, a novel optimization metric is devised to select the best relay on a per-hop basis. The...
There has been growing interest in the integration of multihop (or relaying) capability into conventional wireless networks. In this paper, we propose an OFDM-based selective relaying scheme, where the relay selection at each hop is performed on a per-subcarrier basis and joint selection is adopted at the last two hops. The outage analysis clearly shows that full spatial diversity gain can be achieved...
In ad-hoc networks, cooperative diversity is especially useful where the use of multiple antennas may be impractical. There has been a lot of work on improving the peer-to-peer link quality by using advanced coding or power and rate allocation between a single source node and its relays. However, how to efficiently and fairly allocate resources among multiple users and their relays is still unknown...
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