For example, a first wireless communication device may be configured to cluster a plurality of channel estimation measurements into a plurality of clusters based on a clustering criterion, the plurality of channel estimation measurements corresponding to a respective plurality of Physical Protocol Data Units (PPDUs) received from a second wireless communication device over a wireless communication channel; and, based on clustering of the plurality of channel estimation measurements into the plurality of clusters, selectively provide a clustered channel estimation measurement to be processed for detection of changes in an environment of the wireless communication channel, by providing the clustered channel estimation measurement together with one or more other clustered channel estimation measurements of a same cluster of the clustered channel estimation measurement to be processed for the detection of the changes in the environment.