文档介绍：
STBC-MIMO-OFDM 系统一种次优混合发
射天线选择算法#
马盼,李勇朝,李丹萍,张海林**
5
10
(西安电子科技大学·综合业务网理论及关键技术国家重点实验室(ISN090105))
摘要:针对 MIMO 系统中多输入对输出天线技术带来的成本和复杂度高的问题,在研究空
时编码的 OFDM 系统中基于子载波的天线选择算法基础上,提出一种次优混合发射天线选
择算法,该算法首先基于最大化最小信噪比准则为所有子载波选择一根天线,然后在剩余天
线中基于最大化信噪比准则为每个子载波选择最优的天线。理论分析及仿真结果表明,该算
法在射频链路较少时具有很低的复杂度,可以获得和 per-tone 天线选择算法相同的分集增
益,同时其误比特率非常接近最优的 per-tone 算法。
关键词:MIMO-OFDM;天线选择;STBC
中图分类号:
15
A suboptimal hybrid transmit antenna selection algorithm in
STBC-MIMO-OFDM system
Ma Pan, Li Yongzhao, Li Danping, Zhang Hailin
(Xidian University·State Key Laboratory of Integrated works)
20
25
30
Abstract: MIMO systems with multiple-input multiple-output antennas can cause a high cost and
complexity. Focusing on this problems, a suboptimal hybrid transmit antenna selection algorithm in
OFDM systems is proposed in the study of sub-carriers based antenna selection algorithm. The
proposed algorithm firstly select one antenna for all sub-carriers based on maximizing the minimum
SNR, and then select the best among the remaining antennas for each subcarrier based on maximizing
the SNR. Theoretical analysis and simulation results show that the BER performance of the proposed
algorithm is very close to the optimal per-tone selection with the same diversity gain and low
complexity in the case where the number of RF chains is small.
Key words: MIMO-OFDM; antenna selection; ST