具有非线性功放的空时编码与波束成形系统性能比较

In this paper, MIMO technology is researched. It can exponentially improve the channel capacity of the system and improve the system performance. Single carrier-frequency domain equalization(SC-FDE) is an effective way to combat effects of multipath channel conditions.MIMO+SC-FDE wireless communication system has been proposed to be as one of the effective anti-multipath techniques in the physical layer of IEEE802.16a standards.In this paper, the space-time block codes and beamforming techniques in MIMO are combined with SC-FDE, respectively. Two kinds of multi-antenna transmission schemes are proposed for frequency selective channels using nonlinear power amplifiers. Space-time block coding and decoding algorithms, beamforming algorithms, channel estimation algorithms, channel equalization algorithms, and digital predistortion algorithms for amplifiers. The feasibility of the design scheme is verified by the simulation platform, and the performance of the two schemes is compared and analyzed.