Methods, Control Node, Wireless Device and Access Node for Estimation of Path Loss and Channel Response

A control node (200), a wireless device (204), an access point (202) and methods therein, to achieve estimation of path loss and channel response in a radio link between the wireless device and the access point. The control node (200) assigns one and the same pilot sequence to the wireless device and at least one other wireless device in communication with the access point, and further assigns different device-specific phase rotations to the wireless devices. The devices then apply their assigned phase rotations to the pilot sequence when transmitting the pilot sequence in consecutive coherence intervals to the access point (202) which is thereby able to de-spread the received pilot sequences and estimate path loss and channel response in the radio link.