Constrained Tensor Modeling Approach to Blind Multiple-Antenna CDMA Schemes

摘要: In this paper, we consider an uplink multiple-antenna code-division multiple-access (CDMA) system linking several mobile users to one base station. For system, a constrained third-order tensor decomposition is introduced for modeling the transmitter as well received signal. The structure of proposed characterized by two constraint matrices that have meaningful physical interpretation in our context. They can be viewed canonical allocation define users' data streams and spreading codes transmit antennas. distinguishing features with respect already existing tensor-based CDMA models are: i) it copes multiple antennas per user ii) spatial spreading/multiplexing schemes controlling signal model. A systematic design procedure leading unique blind symbol (or joint symbol-code) recovery which allows us derive finite set fixed number Identifiability model discussed, multiuser detection receiver based on alternating least squares algorithm considered performance evaluation derived from approach.