In this paper, we propose two distributed linear convolutional space-timecoding (DLC-STC) schemes for full-duplex (FD) asynchronous cooperativecommunications. The DLC-STC Scheme 1 is for the case of the complete loopchannel cancellation, which achieves the full asynchronous cooperativediversity. The DLC-STC Scheme 2 is for the case of the partial loop channelcancellation and amplifying, where some loop signals are used as theself-coding instead of treated as interference to be directly cancelled. Weshow this scheme can achieve full asynchronous cooperative diversity. We thenevaluate the performance of the two schemes when loop channel information isnot accurate and present an amplifying factor control method for the DLC-STCScheme 2 to improve its performance with inaccurate loop channel information.Simulation results show that the DLC-STC Scheme 1 outperforms the DLC-STCScheme 2 and the delay diversity scheme if perfect or high quality loop channelinformation is available at the relay, while the DLC-STC Scheme 2 achievesbetter performance if the loop channel information is imperfect.
展开▼
