一种MC-CDMA系统的时域导频信道估计算法

本文针对MC-CDMA系统的下行链路，提出了一种在时域中插入恒模导频信号的最小二乘（LS）信道估计算法，利用复指数信号作为导频，直接在时域估计出信道的频域参数，消除了导频信号对系统峰均功率比（PAPR）的影响，通过对导频信号的下采样处理，在不增加导频数量的同时提供了时域分集能力。仿真结果表明本算法在明显降低运算复杂度的同时有效提高了估计精度。

Channel estimation method by time domain pilots for MC CDMA systems

A novel least square (LS) channel estimation algorithm was proposed for MC-CDMA system, in which the character pilots with constant envelop were inserted in time domain.The complex exponential symbols were adopted as character pilots to estimate the frequency-domain channel parameters directly and avoid influencing the peak-to-average power ratio(PAPR)of the system caused by the inserted pilots.Moreover,the time diversity could be achieved by the downsampling of the pilots without increasing the pilots. Sim...