Frequency-domain transmit processing for MIMO SC-FDMA in wideband propagation channels
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
On the diversity order of non-orthogonal amplify-and-forward over block-fading channels
IEEE Transactions on Wireless Communications
Cooperative Space---Time Coding with Amplify-and- Forward Relaying
Journal of Signal Processing Systems
Multinode Cooperative Communications in Wireless Networks
IEEE Transactions on Signal Processing
Distributed Space-Frequency Coding over Broadband Relay Channels
IEEE Transactions on Wireless Communications - Part 2
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
Fading relay channels: performance limits and space-time signal design
IEEE Journal on Selected Areas in Communications
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The single carrier-frequency division multiple access (SC-FDMA) systemis a new systemthat was adopted in the standardization of the upcoming 3GPP long-term evolution (LTE). Designing diversity-achieving schemes for the SC-FDMA system is a challenging task. The codes adopted should not affect the peak-to-average power ratio (PAPR) among other constraints. In this paper, we consider the design of cooperative diversity schemes for SC-FDMA systems in the uplink direction. Specifically, two relay-assisted distributed space-time/frequency codes are proposed. The proposed distributed space-frequency code (SFC) achieves full spatial diversity in the uplink fast-fading channels, where a diversity of order three can be achieved. The proposed code keeps a low PAPR, which is a good feature of the system. A minimum mean square error (MMSE) decoder is used at the receiver of the destination node. Moreover, we propose a bandwidth-efficient distributed space-time code (STC) for slow-fading relay channels. A decode-and-forward (DF) protocol is used at the relay node, and the possibility of erroneous decoding is taken into account. Simulation results demonstrate the performance improvement of the proposed schemes.