Differential modulation based on quasi-orthogonal codes

@article{Zhu2004DifferentialMB,
  title={Differential modulation based on quasi-orthogonal codes},
  author={Yun Zhu and Hamid Jafarkhani},
  journal={2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733)},
  year={2004},
  volume={1},
  pages={531-536 Vol.1}
}
In this paper, we propose a differential modulation scheme bused on quasi-orthogonal space-time block codes when neither the transmitter nor the receiver has the knowledge of the channel. We consider a system with four transmit antennas and divide it into two subsystems. Each subsystem contains two transmit antennas and uses a differential space-time block code modulation. Based on the encoding and decoding for the two subsystems, we derive the overall encoding and decoding algorithm for the… CONTINUE READING
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