第二种方法是基于虚拟子载波的子空间盲信道估计方法。
The second method is based on the virtual sub-carrier subspace blind channel estimation method.
同时该方法还可以推广到基站采用智能天线的系统中，实现对矢量信道冲激响应的盲估计。
The new method can also be expanded to the base station with antenna array and can realize the estimation of vector channel impulse response.
信道估计的方法从大的角度可以分为非盲估计、盲估计和半盲估计。
Channel estimation methods can be grouped into non-blind estimation, blind estimation and semi-blind estimation.
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