摘要
针对车车通信中快时变无线通信不稳定性和追踪的复杂性,提出一种基于盲信道估计过程中的判决反馈信道估计方法。借助来自接收机端解调器的输出判定符号,利用噪声衰落信道传输数据的统计特性追踪快速变化的信道传递函数;使用时间截断技术对获得的信道估计值进行判决反馈降低噪声影响,对载波间干扰进行消除,从而提高快时变信道的估计精度。仿真表明,相对于传统的信道估计算法,所提出的算法具有更优的误码率和均方误差性能。
In view of the complexity of fast and time-varying wireless communication in V2V communication and the complexity of the tracking,this paper proposed a decision feedback channel estimation method based on blind channel estimation.With the help of output decision symbols from the receiver demodulator,it tracked the fast changing channel transfer function using the statistical characteristics of the data transmitted by the noise fading channel.The time truncation technique used the decision feedback to reduce the noise influence,eliminated the inter carrier interference and improved the estimation accuracy of the fast time-varying channel.Simulation results show that the proposed algorithm has better BER and MSE performance than these classical channel estimation algorithms.
作者
丁青锋
韦民
Ding Qingfeng;Wei Min(School of Electrical&Automation Engineering,East China Jiaotong University,Nanchang 330013,China)
出处
《计算机应用研究》
CSCD
北大核心
2019年第11期3431-3433,3480,共4页
Application Research of Computers
基金
国家自然科学基金资助项目(61501186)
江西省自然科学基金资助项目(20171BAB202001)
江西省教育厅科研项目(GJJ160501)
江西省研究生创新资金资助项目(YC2017-S252)
关键词
车车通信
快时变
判决反馈
信道估计
V2V(vehicle to vehicle)
fast time-varying
decision directed
channel estimation
