A user equipment is configured for operation in a narrowband wireless communication system. The user equipment is configured to detect receipt of a narrowband positioning reference signal that comprises a narrowband reference signal sequence. The narrowband reference signal sequence is a subsequence of a wideband reference signal sequence. The wideband reference signal sequence is configured for a wideband frequency bandwidth that is wider than a maximum frequency bandwidth defined for the narrowband wireless communication system. The user equipment is also configured to perform a positioning measurement using the narrowband positioning reference signal.