CAJ | 학술논문

基于序列相关性提出了一种多输入多输出-正交频分复用(MIMO-OFDM)系统的时域信道估计方法。通过在 OFDM 符号间插入一种具有最佳相关性的实训练序列，在接收端将接收序列与训练序列作相关运算，得到信道的时域冲激响应。并通过信道阶数估计，进一步提高算法估计性能。理论分析和实验仿真结果均表明，与现有方法相比，本文方法具有更高的系统传输效率和更高的估计性能。
기우서렬상관성제출료일충다수입다수출-정교빈분복용(MIMO-OFDM)계통적시역신도고계방법。통과재 OFDM 부호간삽입일충구유최가상관성적실훈련서렬，재접수단장접수서렬여훈련서렬작상관운산，득도신도적시역충격향응。병통과신도계수고계，진일보제고산법고계성능。이론분석화실험방진결과균표명，여현유방법상비，본문방법구유경고적계통전수효솔화경고적고계성능。
Based on the correlation property of sequences,a time-domain channel estimation algorithm for Multi-Input Multi-Output Orthogonal Frequency Division Multiplexing(MIMO-OFDM) is proposed. The real training sequences with perfect correlation property is inserted between OFDM symbols, then the channel impulse response in time domain can be obtained by calculating the cross-correlation between the received sequences and trained sequences. The estimation performance is further improved by the estimation of channel order. The results of both theoretical analysis and experiment show that the proposed method has more excellent estimation performance with higher system transfer efficiency than the existing methods.