Patent ID: 9210003
Filing Date: 2015-12-08
Classification: H04L

Abstract:
1. A downlink channel estimation method, comprising: receiving, by a first mobile terminal located in a central area of a cell, a first signal transmitted by a base station, wherein the first signal is formed by a reference signal transmitted by the base station passing through a channel from the base station to the first mobile terminal; estimating, by the first mobile terminal, a channel response estimate value ĥ from the base station to the first mobile terminal on a resource element corresponding to the first signal, using the first signal and the reference signal; performing, by the first mobile terminal, interpolation on a resource block of a second mobile terminal using the channel response estimate value ĥ, so as to obtain a coarse channel response estimate value h′ from the base station to the first mobile terminal on a resource element corresponding to a data signal of the second mobile terminal, wherein the second mobile terminal is located in an edge area of the cell, and the resource block of the second mobile terminal is adjacent to a resource block of the first mobile terminal; receiving, by the first mobile terminal, a second signal transmitted by the base station, wherein the second signal is formed by the data signal of the second mobile terminal transmitted by the base station passing through the channel from the base station to the first mobile terminal on the resource element corresponding to the data signal of the second mobile terminal; and demodulating, decoding and recovering the data signal of the second mobile terminal from the second signal; setting, by the first mobile terminal, the recovered data signal of the second mobile terminal as a new reference signal, and, in combination with the second signal, updating the coarse channel response estimate value h′, so as to obtain a fine channel response estimate value h″ from the base station to the first mobile terminal on the resource element corresponding to the data signal of the second mobile terminal; and using, by the first mobile terminal, the channel response estimate value ĥ and the fine channel response estimate value h″ to perform the interpolation on the resource block of the first mobile terminal, so as to obtain a channel response estimate value from the base station to the first mobile terminal on a resource element corresponding to a data signal of the first mobile terminal.