A method at a user agent, UA, for identifying a reference signal pattern in contiguous resource blocks (101, 103) received by the user agent in a wireless communication system (11, 12, 13) having a wireless communication channel utilizing a plurality of antenna ports, wherein any two through N resource blocks which are contiguous in frequency may be assigned to the UA, wherein each of the resource blocks that may be assigned to the UA comprises a plurality of frequency rows and time columns defining a matrix of defined positions for a plurality of resource elements, REs, and wherein the reference signal pattern comprises reference signals on a plurality of REs which are divided in groups each assigned to one of the plurality of antenna ports, the method comprising the steps of: storing resource block reference signal patterns in a memory of the UA where the patterns include a separate reference signal pattern for each possible number of contiguous resource blocks that may be assigned to the UA; receiving a resource grant indicating that a number of contiguous resource blocks are assigned to the UA; based on the number of contiguous resource blocks assigned to the UA, identifying one of the reference signal patterns in the memory; and using the identified one of the reference signal patterns to identify reference signals in contiguously received resource blocks; wherein the reference signal pattern for any first and second resource blocks (101, 103) which are contiguous in frequency and that may be assigned to the UA comprises a first reference signal pattern and a second reference signal pattern on, respectively, a plurality of first REs within the first resource block and a plurality of second REs within the second resource block, each first RE corresponding to a second RE assigned to a same antenna port of said plurality of antenna ports, and wherein according to the reference signal pattern: the first REs of each group of first REs assigned to a same antenna port of said plurality of antenna ports are disposed in positions corresponding to different first time columns of the first resource block, said first time columns have a different distance from a central axis passing through a geometrical center of the contiguous first and second resource blocks (101, 103) in a direction parallel to the time columns, said geometrical center corresponding to the center of combined Physical Downlink Shared Channel, PDSCH, regions of the first and second resource blocks, and each second RE of said plurality of second REs is disposed within the second resource block at a position which is symmetric, relative to said geometrical center, to the position of the corresponding first RE within the first resource block. storing resource block reference signal patterns in a memory of the UA where the patterns include a separate reference signal pattern for each possible number of contiguous resource blocks that may be assigned to the UA; receiving a resource grant indicating that a number of contiguous resource blocks are assigned to the UA; based on the number of contiguous resource blocks assigned to the UA, identifying one of the reference signal patterns in the memory; and using the identified one of the reference signal patterns to identify reference signals in contiguously received resource blocks; wherein the reference signal pattern for any first and second resource blocks (101, 103) which are contiguous in frequency and that may be assigned to the UA comprises a first reference signal pattern and a second reference signal pattern on, respectively, a plurality of first REs within the first resource block and a plurality of second REs within the second resource block, each first RE corresponding to a second RE assigned to a same antenna port of said plurality of antenna ports, and wherein according to the reference signal pattern: the first REs of each group of first REs assigned to a same antenna port of said plurality of antenna ports are disposed in positions corresponding to different first time columns of the first resource block, said first time columns have a different distance from a central axis passing through a geometrical center of the contiguous first and second resource blocks (101, 103) in a direction parallel to the time columns, said geometrical center corresponding to the center of combined Physical Downlink Shared Channel, PDSCH, regions of the first and second resource blocks, and each second RE of said plurality of second REs is disposed within the second resource block at a position which is symmetric, relative to said geometrical center, to the position of the corresponding first RE within the first resource block. the first REs of each group of first REs assigned to a same antenna port of said plurality of antenna ports are disposed in positions corresponding to different first time columns of the first resource block, said first time columns have a different distance from a central axis passing through a geometrical center of the contiguous first and second resource blocks (101, 103) in a direction parallel to the time columns, said geometrical center corresponding to the center of combined Physical Downlink Shared Channel, PDSCH, regions of the first and second resource blocks, and each second RE of said plurality of second REs is disposed within the second resource block at a position which is symmetric, relative to said geometrical center, to the position of the corresponding first RE within the first resource block.