Considering the significant expenses and power requirements associated with digital precoding and the low spectral efficiency(SE)of analog precoding,a hybrid precoding algorithm with efficient finite-resolution phase ...Considering the significant expenses and power requirements associated with digital precoding and the low spectral efficiency(SE)of analog precoding,a hybrid precoding algorithm with efficient finite-resolution phase shifters(PSs),named FRPS algorithm,was proposed for millimeter wave(mmWave)massive multi-input multi-output(MIMO)vehicle-to-vehicle(V2V)system.Digital and analog precoding matrix variables and non-convex constraints of the radio frequency(RF)precoder are decomposed into two independent optimization problems.Discrete iterative optimization is employed to solve for the analog and digital precoder alternately.In addition,the effect of finite-resolution PSs is considered in the precoding algorithm optimization.Simulation results show that the FRPS algorithm has a fast convergence speed,and it can approach the SE of fully digital precoding with only 3 bit resolution PS.The performance difference between the FRPS algorithm and the existing hybrid precoding algorithm with infinite-resolution PSs is almost negligible.Moreover,the FRPS algorithm performs superior to that of the infinite-resolution PS hybrid precoding algorithm and fully digital precoding algorithm.展开更多
基金supported by the S&T Program of Hebei Province(2023KFKT002)the Natural Science Foundation of Hebei Province of China(F2024201053)。
文摘Considering the significant expenses and power requirements associated with digital precoding and the low spectral efficiency(SE)of analog precoding,a hybrid precoding algorithm with efficient finite-resolution phase shifters(PSs),named FRPS algorithm,was proposed for millimeter wave(mmWave)massive multi-input multi-output(MIMO)vehicle-to-vehicle(V2V)system.Digital and analog precoding matrix variables and non-convex constraints of the radio frequency(RF)precoder are decomposed into two independent optimization problems.Discrete iterative optimization is employed to solve for the analog and digital precoder alternately.In addition,the effect of finite-resolution PSs is considered in the precoding algorithm optimization.Simulation results show that the FRPS algorithm has a fast convergence speed,and it can approach the SE of fully digital precoding with only 3 bit resolution PS.The performance difference between the FRPS algorithm and the existing hybrid precoding algorithm with infinite-resolution PSs is almost negligible.Moreover,the FRPS algorithm performs superior to that of the infinite-resolution PS hybrid precoding algorithm and fully digital precoding algorithm.
