Methods and systems for csi-rs transmission in lte-advance systems

A station configured for allocating resource elements in an orthogonal frequency division multiplexing (OFDM) system for transmission of a channel state information reference signal (CSI-RS), comprising:

• a conversion unit configured to convert one or more resource elements to a two-dimensional frequency-time domain;
• a partitioning unit configured to partition the one or more converted resource elements to units of a physical resource block (PRB);
• a determination unit configured to determine whether at least a portion of a PRB is being used by a signal;
• and
• an allocation unit configured to allocate the at least a portion of the PRB for transmission of the CSI-RS, if the at least a portion of the PRB is not concurrently being used.

A non-transitory computer-readable recording medium storing thereon instructions for, when executed by a processor, performing a method of allocating resource elements in an orthogonal frequency division multiplexing (OFDM) system for transmission of a channel state information reference signal (CSI-RS), the method comprising:

• converting one or more resource elements to a two-dimensional frequency-time domain;
• partitioning the one or more converted resource elements to units of a physical resource block (PRB);
• determining whether at least a portion of a PRB is being used by a signal;
• and
• allocating the at least a portion of the PRB for transmission of the CSI-RS, if the at least a portion of the PRB is not concurrently being used.