This letter proposes a new beamforming technique, Adaptive Regularized OLP (AR-OLP), by jointly optimizing transmit beamforming and IRS phase shifts to enhance spectral efficiency in downlink wireless communications. We provide a comparative analysis of AR-OLP with two key precoding algorithms: Optimal Linear Precoding (OLP) and Regularized Zero-forcing (RZF) to evaluate their performance under varying network parameters, including the number of transmit antennas, users, and IRS passive elements. Simulation results demonstrate that the proposed AR-OLP algorithm consistently achieves higher average sum rates per user compared to conventional OLP and RZF methods. The performance gains grow with increasing antenna count and IRS size, showing robust interference management and effective resource utilization across different transmit powers. These findings highlight the potential of adaptive hybrid precoding in IRS-aided MISO multiuser systems for next-generation wireless networks.
Future wireless networks are expected to operate in highly time-varying environments where conventional multicarrier waveforms such as Orthogonal frequency division multiplexing (OFDM) suffer from doppler-induced interference. Affine frequency division multiplexing (AFDM) has emerged as a promising waveform for doubly...
Irtizah, Satyam Agarwal· IEEE International Symposium...· 0 citations
This letter investigates a receiver-side fluid antenna system (FAS)-assisted multiuser multi-input single-output downlink system under severe inter-user spatial correlation. We derive closed-form analytical achievable sum rate expressions based on linear precoding, which explicitly decompose the per-user effective chan...
Shi-Qian Liang, Hao-Yang Li, Han-Jiang Hong et al.· IEEE Wireless Communications...· 0 citations
Numerical results show that the proposed impairment-aware STAR-RIS-NOMA design achieves higher sum rates and lower bit error rates than the considered hardware-impairment-unaware benchmarks.
Recently, rotatable antennas (RAs) have attracted widespread attention owing to their inherent simplicity and operational flexibility. In this paper, an RA-enabled integrated sensing and communication (ISAC) system is investigated, which can serve multiple communication users and sense multiple targets simultaneously....
Fang-Zhuo Zhao, Nan-Chi Su, Dong-Xuan He· International Symposium on W...· 0 citations
Simulation results verify that the precoder design based on perfect successive interference cancellation achieves the highest sum-rate, highlighting the necessity of the proposed SINR-constrained precoding schemes in guaranteeing data rates of the primary and secondary links under various channel environments, proving...
Simulation results demonstrate the guaranteed convergence and the superiority of the proposed scheme in improving the minimum weighted SINR at the users, as well as the contribution of the IRS in reducing the transmit power consumption and the number of active transmit antennas at the AP.
