基于比吸收率约束的多天线预编码设计

Multi-antenna Precoding Design Based on SAR Constraint

以比吸收率为约束条件、系统总速率最大化为目标,提出两种适用于多天线上行系统的预编码设计方案。该方案在提高系统频谱效率的同时,兼顾了比吸收率对传输功率的影响,从而将比吸收率约束提前到系统设计和优化之中,减少了后期对比吸收率的评估依赖。仿真结果表明两种算法不仅保证了比吸收率在最大允许范围内,而且大大提升了系统性能。

This paper proposed two novel precoding schemes to maximize the system sum-rate under the constraint of Specific Absorption Rate(SAR)for MIMO uplink system.These schemes not only maximize the system spectral efficiency,but also take the SAR impact on the transmit power into account.This paper brought the SAR constraint into system resource optimization early so as to reduce the burden introduced by SAR measurement and test work.Simulation results show that these schemes could fulfill the SAR under the limit,meanwhile greatly improve system performance.