The invention discloses a self-adapting channel estimating method applied to 3GPP LTE
system. The method comprises the following steps: (1) the LS (least square) channel estimating value at a
pilot tone is computed according to reference signals in a receiving
data field; (2) interpolation in the
time domain is performed according to current frame
pilot tone channel estimated value data and reserved
delay frame
pilot tone channel estimated value data, and a pilot matrix encrypted is obtained through computing; (3) channel
delay spread is estimated according to LS
estimation value at the pilot tone, then
radio frequency channel filtering coefficient is selected according to the
delay spread, and the
frequency domain estimation value is computed; and (4) channel
Doppler spread is estimated according to the LS
estimation value at the pilot tone, then
time domain filtering coefficient is selected according to the
Doppler spread, and the
time domain channel estimation value is computed. The self-adapting channel estimating method provided by the invention has a self-adapting capability to channel characteristics, reduces the
occupancy rate and working consumption of hardware resource, improves the estimating speed and reduces computation delay of an estimator.