Closed-form expression for optimal two-user MIMO unitary precoding
IEEE Communications Letters
Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels
IEEE Transactions on Signal Processing
Rate maximization in multi-antenna broadcast channels with linear preprocessing
IEEE Transactions on Wireless Communications
Probability of error in MMSE multiuser detection
IEEE Transactions on Information Theory
Bit-interleaved coded modulation
IEEE Transactions on Information Theory
On the achievable throughput of a multiantenna Gaussian broadcast channel
IEEE Transactions on Information Theory
Optimum power allocation for parallel Gaussian channels with arbitrary input distributions
IEEE Transactions on Information Theory
On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming
IEEE Journal on Selected Areas in Communications
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This paper is an extension to the earlier proposed idea of exploiting the discrete constellation alphabets in linear precoding for the downlink of multiuser (MU) MIMO. In the earlier work, it was shown that the transmission of controlled interference to the users bears the potential of exploiting the interference structure in improving the error resilience. In this paper we propose a linear precoding strategy for the downlink of multiuser MIMO on the idea of controlled interference. However under the controlled interference, intuitive optimal receiver is Maximum Likelihood (ML) detector which would require an exhaustive search of the controlled interferers. It would have exponential search complexity in the number of users and their constellation sizes. We further propose in this paper a simplified receiver structure which exploits the interference structure by ML detection but its complexity is equivalent to that of a receiver that confronts no interference (in two user case). Monte Carlo simulations show the improved performance of the proposed linear precoding strategy relative to the existing linear precoding schemes.