短波通信中基于隐训练序列的信道阶数估计的改进方法  

Modified Method for Channel-Order Estimation based on Implicit Training Sequencein HF Communication

作　　者：金慧琴[1] 宋斌斌[1] 张海[1] 

机构地区：[1]海军航空工程学院,山东烟台264001

出　　处：《通信技术》2016年第1期48-51,共4页Communications Technology

摘　　要：针对传统的短波信道阶数估计方法在进行信道阶数估计时都存在一些限定条件和不足,给出了一种改进的基于隐训练序列的信道阶数估计方法。该方法是在接收端得到直流偏量的近似估计后,根据所估计的信道系数的统计特征,通过逐次计算均值的方法来估计阶数。该方法能有效消除直流偏量影响而且计算复杂度较低。仿真结果表明,给出的新的基于隐训练序列的信道阶数估计方法能较准确地估计出信道阶数,且存在直流偏量时受信噪比的变化影响较小。Aiming at the limitations and deficiency of traditional HF channel-order estimation method, a modified method based on implicit training sequence for channel-order estimation is proposed. This meth- od, with the acquisition of DC-offset approximate estimation at the receiver, estimates the channel order by computing mean value point by point according to the statistical characteristics of estimated channel coeffi- cient. In addition,this method could effectively eliminate the influence of DC-offset with a relatively low computational complexity. Simulation results show that this novel method of channel order estimation based on implicit training sequence could accurately estimate the channel order and is less sensitive to the change of SNR when DC-offset exists.

关 键 词：隐训练序列 信道估计 阶数估计 短波信道 

分 类 号：TN911.5[电子电信—通信与信息系统]