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提出了一种适用于多入多出正交频分复用(MIMO-OFDM)系统的信道估计算法,详细说明了导频符号的特殊设计算法以及信道估计算法的原理,并对该算法的均方误差性能以及复杂度进行分析;该算法能够在信道多径时延信息准确已知或不准确时带来良好的估计精度,从而保证系统性能。将该算法应用于超三代-时分双工(B3G-TDD)系统中并在室外和室内环境下仿真,均方误差和系统误码率性能结果说明了该算法的有效性;该算法能够大大增强系统的鲁棒性。
A channel estimation algorithm suitable for MIMO-OFDM system is proposed. The special design method of pilot symbol and the principle of channel estimation algorithm are described in detail. Square error performance and complexity analysis. The algorithm can bring good estimation accuracy when the channel multipath delay information is known accurately or inaccurately to ensure the system performance. The algorithm is applied to B3G-TDD system and simulated in outdoor and indoor environments. The results of mean square error and system BER demonstrate the effectiveness of this algorithm. This algorithm can be greatly enhanced System robustness.