Linear Precoders for Multiuser MIMO for Finite Constellations and a Simplified Receiver Structure Under Controlled Interference
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, the authors 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.