基于预编码的MIMO系统的半盲估计

Precoding-based semi-blind channel estimation for MIMO systems

通过时域预编码来克服MUI,采用纯盲估计算法结合短的传统训练序列来进行信道估计。提出了一种应用于MIMO-OFDM系统的基于时域预编码算法的半盲信道估计方案,该方案能够克服多路传输中用户间干扰(MUI)和提高频带的利用率,其预编码算法在低信噪比下优于传统的频域ZF预编码算法的性能,同时该算法具有较低复杂度,易于实现。理论分析和性能仿真均证明了上述特点。

A semi-blind channel estimation scheme for Multiple-Input Output Multiple-Output （MIMO） systems was proposed which is base on the time-domain precoding. This scheme is able to overcome the shortcoming of multi-user interference and to improve the utilization efficiency of high frequency band. In comparison with traditional ZF frequency-domain precoding, this time-domain precoding scheme shows better performance especially at low Signal-to-Noisy Ratio （SNR）. Also the complexity of this precoding scheme is lower and it is easier to implement. Theoretical analysis and performance simulation were conducted that validate the advantages of the proposed scheme.