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针对长期演进上行多用户单载波一频分多址系统,提出了一种增强的信道估计算法.该算法针对每个用户的导频只占有部分频带的特点和子信道的时频相关性,将最小二乘(Ls)算法估计的导频子信道系数进行排序处理,并构造出一种新的减小噪声影响(降噪)的正交变换矩阵,提出了基于该矩阵的高精度信道估计算法.计算机仿真结果表明,该算法的均方根误差约为Ls算法的1/10.
For long-term evolution uplink multi-user single carrier-frequency division multiple access system, an enhanced channel estimation algorithm is proposed, in which the pilot for each user occupies only part of the frequency band characteristics and sub-channel time-frequency correlation, the minimum (LS) algorithm to sort the pilot sub-channel coefficients and construct a new orthogonal transform matrix to reduce noise impact (noise reduction), and propose a high-precision channel estimation algorithm based on the matrix. Computer simulation results show that the root mean square error of this algorithm is about 1/10 of Ls algorithm.