| 摘要 |
A downlink channel estimation method and system, and a mobile terminal. In the method, a first mobile terminal is located in a central area of a cell, a second mobile terminal is located in an edge area of the cell, and a resource block of the second mobile terminal is adjacent to a resource block of the first mobile terminal, so that the first mobile terminal can use a data signal transmitted from a base station to the second mobile terminal to perform downlink channel estimation, thereby improving the accuracy of the downlink channel estimation, and enhancing the performance of the downlink channel estimation. |
| 主权项 |
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 that a reference signal transmitted by the base station passes through a channel from the base station to the first mobile terminal; using, by the first mobile terminal, the first signal and the reference signal to estimate 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, by the first mobile terminal, the channel response estimate value ĥ to perform interpolation on a resource block of a second mobile terminal, 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 that the data signal of the second mobile terminal transmitted by the base station passes 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 from the second signal; taking, by the first mobile terminal, the data signal 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 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. |
