MRC-MMSE detection in DF-cooperative communications with Rate 2/4 trellis coding
Settakorn Kamuang, Suvepon Sittichivapak · International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology · 2010
This paper proposes the MRC-MMSE (Maximal Ratio Combining - Minimum Mean Squared Error) detection of the space time coding over Decode and Forward (DF) cooperative network channel with 16 states binary Rate 2/4 convolutional code. As we employed this convolutional code rate and Alamouti space time scheme, the transmitted signal can be created by two QPSK modulators instead of 16 - PSK or 16-QAM technique. When relay node has detection error, the system is biased. MRCMMSE detection can reduce this effect. Numerical results show that the proposed technique significantly reduces error rate performance. Additionally, this technique does not require any bandwidth expansion.