[IEEE 2011 IEEE 16th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD) - Kyoto, Japan (2011.06.10-2011.06.11)] 2011 IEEE 16th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD) - Modeling and analysis of CFO pre-synchronization for STBC-OFDM-based multi-hop cooperative transmissions in WSNs