Channel estimating method
A technology of channel estimation and channel frequency domain response, applied in the field of wireless mobile communication, can solve the problems of large sub-carrier error, large channel estimation error, obvious channel estimation error, etc., so as to reduce the influence, reduce the channel estimation error, and eliminate the influence. Effect
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[0042] The solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0043] First, assume that the number of subcarriers in the OFDM system is K, the number of virtual carriers is V, the number of available subcarriers is D, and D is usually an even number, obviously K=V+D. If there is no virtual carrier, the number of equally spaced comb pilots is P, and the pilot interval I = K P , Among them, K, P and I are all powers of 2. If there is a virtual carrier, the number of pilots falling into the range of the virtual carrier and the available subcarriers are P V and P D , the subcarrier is subscripted as k, and k=0, 1, . . . , K-1. If the starting position of the pilot subcarrier is k 0 =0(0≤k0 0 = 2, then the obtained channel frequency domain response estimate needs to be cyclically shifted to the right by two...
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