This is often enhanced by also performing TDMA and changing the allocation periodically so that different users get different sub-bands at different times.
ðɪs ɪz ˈɔfən ɛnhˈænst baɪ ˈɔːlsoʊ pɚfˈɔːɹmɪŋ tˌiːdˌiːˌɛmˈeɪ ænd tʃˈeɪndʒɪŋ ðɪ ˌæləkˈeɪʃən pˌiəɹɪˈɑːdɪkli sˌoʊ ðæt dˈɪfɹənt jˈuːzɚz ɡɛt dˈɪfɹənt sˈʌbbˈændz æt dˈɪfɹənt tˈaɪmz.