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研究基于块状导频的最小平方(LS)信道估计、线性最小均方误差(LMMSE)和低秩LMMSE信道估计算法,并进行了算法仿真,得出不同信道估计算法下正交频分复用(OFDM)系统误比特率(BER)和信噪比(SNR)之间的变化关系,以及在不同导频符号间隔下的误比特率曲线图。仿真结果表明:LMMSE、低秩LMMSE和LS算法的性能依次变差,且导频符号间隔对误比特率性能影响较大。
The least squares (LS) channel estimation, linear minimum mean square error (LMMSE) and low-rank LMMSE channel estimation algorithm based on block pilot are studied and the algorithm simulation is carried out. The orthogonal frequency division multiplexing (OFDM) systematic bit error rate (BER) and signal-to-noise ratio (SNR), and the bit error rate (BER) curve at different pilot symbol intervals. The simulation results show that the performances of LMMSE, LMMSE and LS algorithms are degraded in turn, and the pilot symbol interval has a great impact on the performance of the bit error rate.