Research Article
An Alamouti Coded Cooperative Transmission Robust to Both Timing Errors and Frequency Offsets
@INPROCEEDINGS{10.1109/MOBIQ.2007.4451046, author={ Zheng Li and Xiang-Gen Xia}, title={An Alamouti Coded Cooperative Transmission Robust to Both Timing Errors and Frequency Offsets}, proceedings={2nd International ICST Workshop on Advances in Wireless Sensor Networks 2007}, publisher={IEEE}, proceedings_a={IWASN}, year={2008}, month={2}, keywords={Cooperative systems Decoding Fading Frequency diversity Frequency division multiplexing Interference cancellation Interference suppression OFDM Robustness Timing}, doi={10.1109/MOBIQ.2007.4451046} }- Zheng Li
Xiang-Gen Xia
Year: 2008
An Alamouti Coded Cooperative Transmission Robust to Both Timing Errors and Frequency Offsets
IWASN
IEEE
DOI: 10.1109/MOBIQ.2007.4451046
Abstract
In this paper, we propose an Alamouti coded orthogonal frequency-division multiplexing (OFDM) scheme for a cooperative communication system robust to both timing errors and frequency offsets. OFDM with cyclic prefix (CP) is used to combat timing errors. In order to mitigate the intercarrier interference (ICI) caused by multiple frequency offsets in the cooperative system, an ICI-self cancellation scheme is constructed, which can suppress ICI effectively. Moreover, in the proposed scheme, if the channels are real-valued fading channels, the received signals at the destination node have the Alamouti code structure on each subcarrier and thus it has the fast symbol-wise ML decoding and when frequency offsets are not large, the new scheme can achieve diversity order 2.