CAJ | 학술논문

信道估计是无线通信传输的关键技术之一，现有的OFDM盲信道估计算法存在计算复杂度高、精度低的缺点。研究了一种适用于SISO-OFDM系统改进的非冗余预编码的盲信道估计算法。在改进的算法中，采用幂法获得主特征值取代了原有的采用特征值分解，从而使计算复杂度大大降低。仿真结果表明，改进的基于非冗余预编码的盲信道估计算法性能优于原有算法，取得了较为满意的估计效果。
신도고계시무선통신전수적관건기술지일，현유적OFDM맹신도고계산법존재계산복잡도고、정도저적결점。연구료일충괄용우SISO-OFDM계통개진적비용여예편마적맹신도고계산법。재개진적산법중，채용멱법획득주특정치취대료원유적채용특정치분해，종이사계산복잡도대대강저。방진결과표명，개진적기우비용여예편마적맹신도고계산법성능우우원유산법，취득료교위만의적고계효과。
The channel estimation is one of the key factors for wireless communication transmission. The existing blind channel estimation algorithms have such disadvantages as high computation complexity and low accuracy for OFDM communication system. In this paper,we propose an improved non-redundant precoding assisted blind channel estimation scheme for SISO-OFDM system. In the proposed scheme,the principal eigenvector is obtained by the power method with low complexity instead of the complicated eigenvalue decomposition. Simulation results show that the channel estimation and bit error rate performance of the proposed scheme is superior to that of the conventional precoding assisted blind channel estimation scheme,and gains a better estimation effects.