1. A method for uplink channel estimation in a wireless communication system applying transmit power control, the method comprising: providing a channel state model in a channel estimator; obtaining, in said channel estimator, a measured and demodulated received uplink radio signal of a present time slot; estimating channel states of said present time slot, in said channel estimator, by tracking said demodulated uplink radio signal with said channel state model; obtaining a series of transmit power control commands issued for controlling a transmit power of said uplink radio signal; estimating a delay, in units of time slots, between a time a transmit power control command is issued and a time that the transmit power control command is applied, said delay being based on measurements of said particular received uplink radio signal; and adapting channel states of said channel state model before said step of estimating channel states based on a transmit power control command of said series of transmit power control commands compatible with said estimated delay.