摘要
通过使用二阶统计量、数据拟合和对QPSK信号实部和虚部分开考虑的方法得到了一种比较精确的QPSK信号的信噪比估计算法。与现有的另外两种算法相比,不但解决了对低信噪比值无法估计的状况,使估计性能有了明显的提高,而且运算复杂度也可根据需要降低到可以接受的程度。
This paper has deduced a precise SNR estimation algorithm for QPSK signals by using the methods of two-order statistics, data fitting, and considering the real and imaginary components of QPSK signal respectively. Comparing with the other two existing algorithms, this algorithm solves the problem of noneffective to low SNR values and raises the estimation performance obviously; furthermore the computational complexity can be reduced to the range that we can support according to the need of practice application.
出处
《通信学报》
EI
CSCD
北大核心
2004年第2期55-60,共6页
Journal on Communications
基金
国家自然科学基金资助项目
关键词
信息处理技术
信噪比估计
数据拟合
运算复杂度
information processing technology
SNR estimation
data fitting
computational complexity
