摘要
介绍了OFDM信道盲估计的子空间方法及其研究现状,并对文献[6]的算法按照WLAN802.11a的符号格式在存在虚载波及导频的情况下进行了性能仿真,研究了要达到一定的精度,算法应选取的包长及算法对信道SNR的要求。仿真结果表明导频格式会影响算法的收敛,但通过加入不相关的导频,能保证算法的收敛。
This paper introduces subspace methods of blind channel estimation in OFDM and its research state. The performance of the algorithm is simulated according to the symbol format of WLAN 802.11a in the exiting of virtual carriers and pilot carriers. The results show that the pilot influences convergence of the algorithm. By adding uncorrelated pilots, the convergence of the algorithm is achieve. In order to achieve a certain precision, the proper packet length and channel SNR is necessary.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2006年第5期752-754,共3页
Journal of University of Electronic Science and Technology of China
