Performance Analysis of Downlink Beamforming Algorithms in TDLTE System
Jiang Zhi-ning · Telecommunication Engineering · 2010
Principles of two beamforming algorithms,i.e.,per-RB-MRT and full-BW-EBB,are introduced.To provide performance reference for practical applications,a complete uplink-downlink simulation platform is built according to 3GPP-LTE specifications.The performance of two algorithms under imperfect channel estimation and channel information delay is studied.It is shown that performance of the per-RB-MRT algorithm approaches the optimal theoretical benchmark when the uplink channel estimation is accurate and uplink/downlink channel matches well.The full-BW-EBB algorithm,on the other side,provides robust performance under imperfect channel estimation and uplink/downlink mismatch.The theoretical discussion and simulation results provide valuable reference for algorithm design in TD-LTE systems.