Multiple-input multiple-output (MIMO) is a key technology in modern wireless networks, but its performance is often analyzed under ideal hardware assumptions. In practical implementations, however, quantization appears throughout the signal-processing chain, including channel state information (CSI) feedback, fronthaul...
Yasaman Khorsandmanesh, Parisa Ramezani, Emil Björnson· 0 citations
A broad family of practical design problems can be represented using quadratically constrained quadratic programs (QCQPs), where both the objective function and the constraints are quadratic functions of the optimization variables.
This work studies downlink precoding/combining for multi-user multiple-input multiple-output (MU-MIMO)--OFDM systems by minimizing the sum of the users'mean-squared errors (MSEs) under per-subcarrier transmit-power limits, per-antenna OOB spectral-mask constraints, and per-antenna peak-amplitude (clipping) constraints.
Navid Reyhanian, Parisa Ramezani, Emil Björnson· 0 citations
A joint access and fronthaul resource allocation algorithm is proposed that maximizes the minimum user equipment (UE) spectral efficiency while satisfying fronthaul load constraints and shows that severe fronthaul limitations not only reduce UE rates but also introduce spatial performance disparities depending on the c...
Ozan Alp Topal, Ozlem Tuugfe Demir, Emil Björnson et al.· arXiv.org· 0 citations
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