Patent ID: 8798569
Filing Date: 2014-08-05
Classification: H04L

Abstract:
1. A channel estimation method in a multi-antenna system, comprising: for each uplink user received by a base station array antenna, obtaining an original channel estimation value for each array element of the array antenna; generating a channel estimation matrix using the obtained original channel estimation values, wherein the channel estimation values associated with each array element form a respective row vector of the channel estimation matrix, and the channel estimation values of respective array elements corresponding to a location of each channel estimation tap form a respective column vector of the channel estimation matrix; dividing the channel estimation matrix into a channel estimation amplitude matrix and a channel estimation phase matrix; grouping, in the channel estimation amplitude matrix, the channel estimation values associated with the respective array elements at one corresponding tap location together for signal transformation processing; applying a transform-domain noise reduction to a high-frequency portion of transform-domain data obtained by the signal transformation processing; obtaining a noise-reduced channel estimation amplitude matrix by applying an inverse transform to the noise-reduced transform domain data; and combining the noise-reduced channel estimation amplitude matrix with the channel estimation phase matrix into a restored channel estimation matrix, wherein the amplitude of each channel estimation value of the restored channel estimation matrix has undertaken a multi-antenna transform domain noise reduction process.