摘要
在采用部分功率训练序列同步的OFDM系统中[1] ,训练序列会对OFDM承载用户数据的检测造成严重干扰.本文针对每个无线分组包中只有一个OFDM符号,即训练序列和用户数据同时在一个OFDM符号时间内发射,提出一种抑制训练序列干扰的方法,在接收机中分离训练序列、OFDM承载的用户数据.在室内多径衰落信道的条件下,本文分析和仿真了训练序列和OFDM承载用户数据的分离性能,结果表明,分析与仿真结果相近,分离效果明显.
While the partial power training sequences is used for synchronization in Orthogonal Frequency-Division Multiplexing (OFDM) system,the received data signals will be interfered by the training sequences.we give a method for suppressing the interference caused by the training sequence.Especially we focus on only one OFDM symbol in a packet transmission.Both theoretical and simulated results of the above technique are presented under indoor multipath Rayleigh fading channel.It is shown that the better BER performance can be achieved as compared with no separation,and only one OFDM symbol can accomplish user data communication.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第4期714-717,共4页
Acta Electronica Sinica
基金
国家自然科学基金(No.60272009
No.60472045
No.60496313)
国家高技术研究发展计划(863计划)(No.2003AA12331006)
教育部博士点基金(No.20020614001)
