摘要
信号检测与参数估计是低信噪比突发通信研究的关键技术之一,双相关信号检测算法具有良好的性能,但是计算复杂度较高,为方便工程使用,对双相关算法进行了简化。简化的双相关检测算法部分运算结果可以直接用于频偏与相位估计,减少运算量。对简化的双相关算法进行了MATLAB仿真,同时采用经典算法进行频偏相位估计,仿真结果显示简化的算法在低信噪比下具有较宽的动态范围、较大的频偏估计范围以及接近理论界的相位估计性能。
The signal detection and parameter estimation are key techniques in low SNR and burst communications. The doublesliding window algorithm has good performance,however,it has huge calculating complexity. For the convenience of project apphcation,this paper simplifies the double-correlation algorithm. Some computing results of the simplified algorithm can be used for frequency devia-tion and phase estimation to reduce the computational complexity. The results of simulation by MATLAB show that the simplified algorithmhas larger dynamic range, larger frequency deviation estimation range and phase estimation performance close to theory boundary.
出处
《无线电通信技术》
2017年第5期52-56,共5页
Radio Communications Technology
基金
国家部委基金资助项目
关键词
低信噪比
突发通信
信号检测
参数估计
low SNR
burst communication
signal detection
parameter estimation
