Turbo-BLAST系统中的注水功率控制算法  

A Water-Filling Power Control Algorithm for Turbo-BLAST System

作　　者：陈小敏[1] 徐大专[1] 虞湘宾[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,江苏南京210016

出　　处：《信息与控制》2009年第4期505-508,共4页Information and Control

摘　　要：为改善信道容量性能,针对完全信道状态信息和不完全信道状态信息两种情况,提出了适用于Turbo-BLAST系统的注水功率控制算法.在总功率约束条件下,根据信道状态信息,利用注水原理对发送的信号进行功率控制,以提高信道容量.仿真结果显示,和等功率控制相比,在信道完全被估计以及不完全被估计的情况下,采用所提算法均可以显著提高系统的信道容量.In order to improve channel capacity performance, a water-filling power control algorithm is presented for Turbo-BLAST systems with perfect or imperfect channel state information. Under the condition of total power constraints, the water-filling principle is used to allocate power for the transmitted signal based on the channel state information so that the channel capacity can be improved. Simulation results show that, compared with equivalent power control, the proposed algorithm is effective to improve the channel capacity no matter whether the channel estimation is perfect or imperfect.

关 键 词：TURBO-BLAST 完全/不完全信道状态信息 注水功率控制 

分 类 号：TN92[电子电信—通信与信息系统]