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The impact of transmit correlation on the performance of limited feedback Multi-User MIMO is investigated. Correlated fading is shown to highly influence the probability of scheduling orthogonal users and the ability to achieve small quantization errors. Correlated fading is indeed beneficial to MUMIMO performance as it can potentially reduce the(More)
An important challenge of wireless networks is to boost the cell edge performance and enable multi-stream transmissions to cell edge users. Interference mitigation techniques relying on multiple antennas and coordination among cells are nowadays heavily studied in the literature. Typical strategies in OFDMA networks include coordinated scheduling,(More)
Given a contraint on the total amount of feedback overhead, we investigate the allocation of feedback bits (i.e. codebook sizes) among users in a limited feedback Zero Forcing Beamforming-based MU-MIMO scheme where users have the opportunity to adapt their codebooks as a function of their own channel statistics. We consider both single-polarized and(More)
We consider regularized channel inversion (RI) precoding in the multiuser multiple input multiple output (MuMIMO) broadcast channels. To make the RI operate in quantized channel feedback condition, we analyze the quantization error variance and its effect on the signal to interference plus noise power ratio (SINR) of the user signals. The regularization(More)
SU and MU-MIMO performance relies on accurate link adaptation in order to benefit from multi-user scheduling, beamforming, adaptive coding and modulation. Such accuracy highly depends on the type of the channel state information feedback. LTE-Advanced has defined two major types of feedback, i.e. implicit and explicit feedback. Implicit feedback makes some(More)
The minimized-average-error bilevel display algorithm of Floyd et al. [l, 21 is extended to a general ,I-level error-feedback filter for picture display. This filter, which operates recursively on the net system input-output errors using the so-called two-dimensional nonsymmetric half-plane window [3], is analyzed to obtain the optimal properties. Instead(More)