摘要
提出一种基于Hough变换的单谱特征分析的异质网通信信道脉冲响应频率估计算法。采用正交频率复用OFDM训练起始帧,加入多径分量的相位偏移进行相位偏转修正,构建了信道模型与脉冲响应信号模型。频率估计中采用Hough变换把信号空间中的直线的检测问题转换为参数空间中对点的检测问题,计算多普勒单谱脉冲响应信号的约束经验模态值,实现Hough变换单谱脉冲信号检测和脉冲响应频率估计算法改进。仿真实验表明,该算法能准确估计出异质网间通信脉冲响应信号的频率值,精度较传统方法高,在最小的迭代步数下实现算法收敛,误码率为0,性能较优。
Based on the heterogeneous network communication channel Hough transform, and the single spectrum feature analysis of the impulse response frequency estimation algorithm is proposed. Using orthogonal frequency multiplexing OFDM training start frame, adding a phase offset multipath component phase deflection correction, constructs the pulse and response signal model of channel model. Frequency estimation using the Hough transform to convert the linear detection signal space for the detection of point in parameter space, calculate the Doppler singlet impulse response constrained empirical mode value of signal, Hough transform to achieve single pulse signal detection and the impulse response frequency estimation improved calculation method. Simulation results show that, this algorithm can accurately estimate the communication between heterogeneous network impulse response signal frequency, and it has high precision compared with traditional methods, the algorithm convergence in the iterative step number is the smallest, the bit error rate is 0, it has better performance in application.
出处
《科技通报》
北大核心
2015年第2期149-151,共3页
Bulletin of Science and Technology
关键词
异质网
通信信道
HOUGH变换
频率估计
heterogeneous network
communication channel
Hough transform
frequency estimation
