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To enable spectrum-efficient and energy-efficient technology, this article analyzes a full-duplex (FD) assisted multiuser-MIMO (MU-MIMO) system which affected by imperfect channel state information (ICSI) for a Rician fading environment. This system suffers from co-channel interference, multi-user interferences, multiple stream interferences, residual Self-interference, and noise. To combat interferences while achieving maximum spectral and energy efficiencies, we propose an efficient signal-to-leakage-plus-noise ratio precoding scheme (SLNR-PS), resulting in closed-form expressions. By using this precoding scheme, we can determine the optimal precoding coefficients for uplinks and downlinks. FD MU-MIMO’s total spectral efficiency (SE) is achieved using the optimized coefficients. We also employ a power consumption model to achieve our goal of maximizing energy efficiency. For all Rician factors and a …