Minimum probability of error for asynchronous Gaussian multiple-access channels
IEEE Transactions on Information Theory
Digital communications
Multiuser Detection
Iterative decoding of binary block and convolutional codes
IEEE Transactions on Information Theory
Multi-user detection for DS-CDMA communications
IEEE Communications Magazine
A low-complexity iterative multiuser receiver for turbo-coded DS-CDMA systems
IEEE Journal on Selected Areas in Communications
Iterative multiuser detection for asynchronous CDMA with concatenated convolutional coding
IEEE Journal on Selected Areas in Communications
Performance of turbo interference cancellation receivers in space-time block coded DS-CDMA systems
EURASIP Journal on Wireless Communications and Networking
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We propose an iterative multiuser detector for turbo-coded synchronous and asynchronous direct-sequence CDMA (DS-CDMA) systems. The receiver is derived from the maximum a posteriori (MAP) estimation of the single user's transmitted data, conditioned on information about the estimate of the multiple-access interference (MAI) and the received signal from the channel. This multiple-access interference is reconstructed by making hard decisions on the users' detected bits at the preceding iteration. The complexity of the proposed receiver increases linearly with the number of users. The proposed detection scheme is compared with a previously developed one. The multiuser detector proposed in this paper has a better performance when the transmitted powers of all active users are equal in the additive white Gaussian noise (AWGN) channel. Also, the detector is found to be resilient against the near-far effect.