A method network node, user equipment and location server are disclosed, the method performed at the network node comprises broadcasting position reference signals, the position reference signals being broadcast as a repeating pattern within a periodically repeating position reference signal time period, comprising: controlling the network node to broadcast during each of the position reference signal time periods, a plurality of position reference signal blocks each within a time frequency resource block, at least one of the plurality of position reference signal blocks comprising a plurality of consecutive subblocks, at least one position reference signal subblock comprising a time period in the time frequency resource block during which the network node broadcasts the position reference signal and at least one muted subblock comprising a different time period within the time frequency resource block during which the network node broadcasts no position reference or data signal in a frequency bandwidth of the time frequency resource block.