IEEE Transactions on Signal Processing
Obtaining full-diversity space-frequency codes from space-time codes via mapping
IEEE Transactions on Signal Processing
Carrier Frequency Offset Mitigation in Asynchronous Cooperative OFDM Transmissions
IEEE Transactions on Signal Processing
Coded cooperation in wireless communications: space-time transmission and iterative decoding
IEEE Transactions on Signal Processing
Asynchronous cooperative diversity
IEEE Transactions on Wireless Communications
Distributed Space-Time Coding in Wireless Relay Networks
IEEE Transactions on Wireless Communications
Carrier Frequency Offset Compensation with Successive Cancellation in Uplink OFDMA Systems
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications - Part 2
Distributed linear convolutive space-time codes for asynchronous cooperative communication networks
IEEE Transactions on Wireless Communications - Part 2
IEEE Transactions on Information Theory
Space-time block codes: a maximum SNR approach
IEEE Transactions on Information Theory
High-rate codes that are linear in space and time
IEEE Transactions on Information Theory
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Delay-Tolerant Distributed-TAST Codes for Cooperative Diversity
IEEE Transactions on Information Theory
Space–Time Block Codes Achieving Full Diversity With Linear Receivers
IEEE Transactions on Information Theory
BICM-OFDM for cooperative communications with multiple synchronization errors
Proceedings of the 6th International Wireless Communications and Mobile Computing Conference
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Cooperative randomized MIMO-OFDM downlink for multicell networks: design and analysis
IEEE Transactions on Signal Processing
Performance Analysis of the Cooperative ZP-OFDM: Diversity, Capacity and Complexity
Wireless Personal Communications: An International Journal
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In cooperative communications, due to the distributed nature, multiple different carrier frequency offsets (CFOs) may occur and make the channel time-varying. It is hard for the receiver to compensate multiple CFOs from multiple relay nodes simultaneously. Thus, the conventional space-time codes to collect cooperative diversity for co-located multi-input multi-output (MIMO) systems may not be applied directly. In this paper, we consider the cooperative transmission with multiple CFOs when the channels from relay nodes to destination node are flat (frequency-non-selective) fading. We approximate a flat fading channel with CFO as a block time-invariant intersymbol-interference (ISI) channel in the frequency domain. We then propose two distributed space-frequency codes (SFC) for such ISI channels in the frequency domain to achieve the cooperative full spatial diversity, where the space-frequency coding concept is different from the one in the literature and also has a different role. One is called frequency-reversal SFC and the other is called frequency-domain linear convolutive SFC. Furthermore, we show that, with only linear receivers, such as zero-forcing (ZF) and minimum mean square error (MMSE) receivers, our codes achieve the full cooperative diversity.