A method of operation of a node associated with a distributed antenna wireless system to determine a geographic location of a wireless device, comprising: • obtaining one or more combined receive signals responsive to a transmission by a wireless device, wherein: - the distributed antenna wireless system comprises a plurality of remote radio heads each comprising one or more receivers; - each receive branch of one or more receive branches of the distributed antenna wireless system comprises a combination of one receiver of the one or more receivers from each of the plurality of remote radio heads; and characterised by: - the one or more combined receive signals comprises, for each receive branch of the one or more receive branches of the distributed antenna wireless system, a combined receive signal that is a combination of signals received by the receivers comprised in the receive branch in accordance with different simultaneous ON/OFF patterns assigned to the plurality of remote radio heads for the one or more receive branches; and • analyzing the one or more combined receive signals to determine information indicative of a geographic location of the wireless device. • obtaining one or more combined receive signals responsive to a transmission by a wireless device, wherein: - the distributed antenna wireless system comprises a plurality of remote radio heads each comprising one or more receivers; - each receive branch of one or more receive branches of the distributed antenna wireless system comprises a combination of one receiver of the one or more receivers from each of the plurality of remote radio heads; and characterised by: - the one or more combined receive signals comprises, for each receive branch of the one or more receive branches of the distributed antenna wireless system, a combined receive signal that is a combination of signals received by the receivers comprised in the receive branch in accordance with different simultaneous ON/OFF patterns assigned to the plurality of remote radio heads for the one or more receive branches; and - the distributed antenna wireless system comprises a plurality of remote radio heads each comprising one or more receivers; - each receive branch of one or more receive branches of the distributed antenna wireless system comprises a combination of one receiver of the one or more receivers from each of the plurality of remote radio heads; and characterised by: - the one or more combined receive signals comprises, for each receive branch of the one or more receive branches of the distributed antenna wireless system, a combined receive signal that is a combination of signals received by the receivers comprised in the receive branch in accordance with different simultaneous ON/OFF patterns assigned to the plurality of remote radio heads for the one or more receive branches; and - the one or more combined receive signals comprises, for each receive branch of the one or more receive branches of the distributed antenna wireless system, a combined receive signal that is a combination of signals received by the receivers comprised in the receive branch in accordance with different simultaneous ON/OFF patterns assigned to the plurality of remote radio heads for the one or more receive branches; and • analyzing the one or more combined receive signals to determine information indicative of a geographic location of the wireless device.