Enhancement Of Code Division Multiplexing Design For Demodulation Reference Signals

Abstract: The present embodiments relate to a method and apparatuses (1200) for generating a demodulation reference signal (DMRS) comprising one or more ports for a transmission of a physical channel, the method comprising: generating and mapping (1101) a bit sequence to a first real- or complex-valued sequence r(q), wherein, the indexing q is expressed as a linear combination of a first index/variable and a second index/variable in which said both first and second indices are integer valued and non-negative, and the sequence r(q) comprises at least L entries; generating (1102) a second L-length sequence, Formula (I), (I) for a port p of the DMRS comprising unit-magnitude entries that are real- or complex-valued, wherein, Formula (II), (II) is an indexing variable; and mapping (1103) the first and second sequences to a subset of L DMRS resource elements of the physical channel for said port p, wherein the DMRS resource elements are associated with at least two different values of said first index, and are present in one physical resource block (PRB) or across multiple PRBs associated with the physical channel.

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