A New SCFDE STS Scheme With Joint Channel Estimation and Multiuser Detection

In this paper, a Single Carrier Frequency Domain Equalization (SCFDE) transmission using Space-Time-Spreading (STS) for multiuser broadband wireless frequency selective fading channel is investigated. Each user equipped with two transmit antennas is assigned two orthogonal data spreading codes and a third pilot spreading code to facilitate channel estimation. The authors propose a joint channel estimation and multiuser detection receiver. They show that the proposed scheme is Multi-User Interference (MUI) free and that increasing the number of users in the system does not affect the bit error-rate performance.