The channel presumption of degree of complicated for radio communication it is decreased

摘要

When in order to deduce the same channel estimator, method of the power zu ku is used compared to, technology in order to deduce channel estimator making use of the complex multiplication of substantially little number. In one method, as for intermediate vector B, vector for channel frequency response estimator Several 161 It is deduced early on the basis of the sub vector (K1) of K, and at least two DFT sub queues for DFT queue W. Also intermediate queue for A of DFT queue W is acquired. Next, the smallest squaring channel impulse response estimator is deduced on the basis of intermediate vector B and intermediate queue A. In one execution form, as for intermediate vector B, queue Several 162 It is obtained by first calculating DFTs. As for this queue, vector Several 163 It is formed of on the basis, supplies queue G_LXL. Inner product with the line of basis DFT sub queue W₁ and line of queue G_LXL is calculated next and obtains the entry of intermediate vector B.