A method performed by a user equipment, the method comprising: establishing a set of a plurality of secondary synchronization signal sequences to be used in connection with one or more communication targets, where establishing the set of plurality of secondary synchronization signal sequences includes: determining an expected maximum residual carrier frequency offset value; determining a set of possible sequence values having a predetermined length, where each sequence value in the set is based upon a first maximum length sequence having a first cyclic shift, and is based upon a second maximum length sequence having a second cyclic shift, wherein the first and the second cyclic shifts are determined by a respective cell identity which is a function of a new radio, NR, primary synchronisation signal sequence index and a NR secondary synchronisation signal sequence index; selecting from the set of possible sequence values a subset of sequence values to be included as part of the established set, the selected subset of sequence values including no more than one sequence value from any group of possible sequence values from the determined set where any two secondary synchronization signal sequences having a common value of the difference between a first cyclic shift and a second cyclic shift thereof, have two different first cyclic shift values, where the second cyclic shift is larger than the first cyclic shift, and a magnitude of a difference of the two first cyclic shift values is larger than a first value, wherein the first value is dependent on the expected maximum residual carrier frequency offset value; assigning each one of the selected subset of values included as part of the established set to a respective one of the communication targets; receiving a downlink signal including a secondary synchronization signal, where the secondary synchronization signal comprises one of the selected subset of values included as part of the established set; and detecting the synchronization signal. establishing a set of a plurality of secondary synchronization signal sequences to be used in connection with one or more communication targets, where establishing the set of plurality of secondary synchronization signal sequences includes: determining an expected maximum residual carrier frequency offset value; determining a set of possible sequence values having a predetermined length, where each sequence value in the set is based upon a first maximum length sequence having a first cyclic shift, and is based upon a second determining an expected maximum residual carrier frequency offset value; determining a set of possible sequence values having a predetermined length, where each sequence value in the set is based upon a first maximum length sequence having a first cyclic shift, and is based upon a second maximum length sequence having a second cyclic shift, wherein the first and the second cyclic shifts are determined by a respective cell identity which is a function of a new radio, NR, primary synchronisation signal sequence index and a NR secondary synchronisation signal sequence index; selecting from the set of possible sequence values a subset of sequence values to be included as part of the established set, the selected subset of sequence values including no more than one sequence value from any group of possible sequence values from the determined set where any two secondary synchronization signal sequences having a common value of the difference between a first cyclic shift and a second cyclic shift thereof, have two different first cyclic shift values, where the second cyclic shift is larger than the first cyclic shift, and a magnitude of a difference of the two first cyclic shift values is larger than a first value, wherein the first value is dependent on the expected maximum residual carrier frequency offset value; selecting from the set of possible sequence values a subset of sequence values to be included as part of the established set, the selected subset of sequence values including no more than one sequence value from any group of possible sequence values from the determined set where any two secondary synchronization signal sequences having a common value of the difference between a first cyclic shift and a second cyclic shift thereof, have two different first cyclic shift values, where the second cyclic shift is larger than the first cyclic shift, and a magnitude of a difference of the two first cyclic shift values is larger than a first value, wherein the first value is dependent on the expected maximum residual carrier frequency offset value; assigning each one of the selected subset of values included as part of the established set to a respective one of the communication targets; receiving a downlink signal including a secondary synchronization signal, where the secondary synchronization signal comprises one of the selected subset of values included as part of the established set; and detecting the synchronization signal.