![]() ![]() Since Release 8/9 UEs are not aware of CSI-RS and will see CSI-RS as interference (which can be placed in PDSCH Physical Downlink Shared Channel resource elements), the placement of CSI-RS was designed to be sparse in both the time and frequency domains to minimize the effect on these UEs. However, extending C-RS to 8 layers would add more signaling overhead than was desired, so the CSI channel state information Reference Signal was added. With the addition of up to 8-layer spatial multiplexing in Release 10 came the need for 8-layer channel estimation. In Release 8, Cell-specific RS ( C-RS) was designed for use in channel estimation for up to 4-layer spatial multiplexing, with separate C-RS Cell-specific RS sequences for each antenna port (0-3). cell phone) to estimate the channel and report channel quality information ( CQI Channel Quality Indicator) to the base station. ![]() CSI-RS (LTE-Advanced) CSI-RS (LTE-Advanced)ĬSI-RS Channel State Information Reference Signal is the Channel State Information Reference Signal and is used by the UE User Equipment (e.g.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |