针对高速移动环境下频率色散现象以及信道容量低和系统可靠性差的问题，提出采用多输入多输出(Multiple-Input Multiple-Output，MIMO)技术与单载波频分多址(Single Carrier Frequency Division Multiple Acess，SC-FDMA)技术相结合的方法，设计了一种适用于四天线MIMO-SC-FDMA通信系统的高精度信道估计算法。该算法采用空时编码(Spatial Time Block Code，STBC)与时间切换传输分集(Time Switched Transimit Diversity，TSTD)结合的 STBC-TSTD 分集编码技术，选择自然插值方案，在离散傅里叶变换(Discrete Fourier Transform，DFT)信道估计方法的基础上设计了一种利用频域加权来提高信道估计精度的高精度信道估计算法，减小了频率色散现象影响，提升了信道容量和系统可靠性，通过仿真分析验证了所提算法的有效性。
A High Precision Channel Estimation Scheme for Four Antenna MIMO-SC-FDMA
To solve the problems of frequency dispersion,low channel capacity and poor system stability in high-speed mobile envi-ronment,this paper proposes a method combining Multiple-Input Multiple-Output(MIMO)technology with Single Carrier Frequency Di-vision Multiple Access(SC-FDMA),and designs a high-precision channel estimation method for four antenna MIMO-SC-FDMA commu-nication system.The proposed algorithm uses Spatial Time Block Code and Time Switched Transimit Diversity(STBC-TSTD)diversity coding technology,selects natural interpolation scheme,and based on Discrete Fourier Transform(DFT)channel estimation scheme.We have designed a high-precision channel estimation scheme that utilizes frequency domain weighting to improve channel estimation accu-racy,which reduces the influence of frequency dispersion,improves channel capacity and system reliability.The effectiveness of the pro-posed algorithm was verified through simulation analysis.
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