Patent ID: 8737347

Claim:
A pilot and channel estimation method, for SDMA MIMO transmission downlink, including: for the MIMO transmission downlink that employs pre-coding for SDMA, taking the quantity of orthogonal pilot resources occupied by one or more users in a pre-coding domain as a number of data streams that are transmitted or a number of spatial dimensions occupied first, at the transmitting end of a base station; then, performing SDMA transmission pre-coding for one or more orthogonal pilots in the pre-coding domain in the same way as one or more data signals, to obtain one or more pilot signals of the users in a transmitting antenna domain; wherein, the one or more pilot signals of the users in the pre-coding domain are orthogonal in a frequency domain or a code domain, and the one or more pilot signals of different users in the pre-coding domain are identical or not identical to each other; and the one or more pilot signals of different users in the transmitting antenna domain occupy same time-frequency resources; and at the receiving end of the users, obtaining a channel state information required for coherent detection and channel measurement for the users, with one or more transmitted pilot signals and one or more received known pilot signals.