Abstract
Recently, the space-time coded code division multiple access (ST-coded CDMA) has been widely investigated for the great demand on capacities and transmission rates in the future wireless communication systems. The Alamouti's space-time block code scheme is examined here where two linearly constrained minimum variance (LCMV) filters are designed in the receiver. In this paper, the two weight vectors of the LCMV filters are shown to be related each other. Then only half of the computational complexity is required to detect the space-time coded symbols. Furthermore the LCMV filters are very sensitive to finite samples and signature vector errors. We propose both the forward-backward averaging technique and the eigenspace technique to enhance the system performance. Moreover, we present a subspace-based channel estimator which utilizes the space-time coding property to improve the performance of channel estimator. Computer simulations are given to demonstrate the effectiveness of the channel estimation and receiver design for the ST-coded CDMA systems
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
