A method for a radio network node, for communication of a receiver-specific control channel signal within a wireless communication system, to be received by a receiver, wherein receiver-specific downlink control channel signals are scheduled for transmission over sets of Physical Resource Block, PRB, pairs (250-0, 250-1, 250-2, 250-3, 250-4, 250-5), comprising: configuring at least one receiver-specific set of at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5) of time-frequency Resource Elements, REs; configuring a set of modulation signature sequences; selecting at least one set of at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5) for the transmission of a receiver-specific control channel signal; modulating the selected at least one receiver-specific set by applying a selected at least one modulation signature sequence; and transmitting the receiver-specific control channel signal over the at least one modulated receiver-specific set of the at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5); characterized by the further steps of: configuring an alphabet of at least one symbol, where each symbol in the alphabet is associated with a modulation signature sequence in the configured set of modulation signature sequences; selecting, for each configured receiver-specific set of at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5), the at least one modulation signature sequence by selecting a receiver-specific codeword comprising a number of symbols from the configured alphabet; and transmitting any, some, or all of: the configured set of modulation signature sequences, and/or the configured alphabet of symbols. configuring at least one receiver-specific set of at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5) of time-frequency Resource Elements, REs; configuring a set of modulation signature sequences; selecting at least one set of at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5) for the transmission of a receiver-specific control channel signal; modulating the selected at least one receiver-specific set by applying a selected at least one modulation signature sequence; and transmitting the receiver-specific control channel signal over the at least one modulated receiver-specific set of the at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5); characterized by the further steps of: configuring an alphabet of at least one symbol, where each symbol in the alphabet is associated with a modulation signature sequence in the configured set of modulation signature sequences; selecting, for each configured receiver-specific set of at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5), the at least one modulation signature sequence by selecting a receiver-specific codeword comprising a number of symbols from the configured alphabet; and transmitting any, some, or all of: the configured set of modulation signature sequences, and/or the configured alphabet of symbols. configuring an alphabet of at least one symbol, where each symbol in the alphabet is associated with a modulation signature sequence in the configured set of modulation signature sequences; selecting, for each configured receiver-specific set of at least one PRB pair (250-0, 250-1, 250-2, 250-3, 250-4, 250-5), the at least one modulation signature sequence by selecting a receiver-specific codeword comprising a number of symbols from the configured alphabet; and transmitting any, some, or all of: the configured set of modulation signature sequences, and/or the configured alphabet of symbols.