Layered space-time architecture for single-carrier block extended CDMA systems
Tio Surya Dharma, A. S. Madhukumar, A. Benjamin Premkumar, Xiaoming Peng · 2006
In this paper, we propose a single-carrier block spread CDMA for multiple transmit and receive antennas. The spreading process is what differentiate the proposed scheme from conventional CDMA systems. Traditionally, symbol spread- ing and despreading lead to chip-wise processing. Here, block spreading and despreading lead to symbol-wise processing which reduces the receiver complexity considerably. A novel system based on layered space-time architecture and block spreading method is proposed in this paper, in order to enhance the system performance. The proposed system is studied extensively under different channel conditions and is compared against conventional single-carrier and multicarrier systems.