3GPP LTE Release 10 standards (also known as
LTE-Advanced) adopted some of the state-of the- art radio access technologies
that include carrier aggregation, eight-layer downlink spatial multiplexing,
and four-layer uplink spatial multiplexing. For facilitating these
enhancements, reference signals have significantly evolved in LTE-Advanced. This
article examines underlying design principles of the LTE-Advanced reference signals.
Specifically, newly introduced dedicated demodulation reference signals and channel
state information reference signals for downlink and improvements of
demodulation reference signals and sounding reference signals in uplink are
discussed. GET FURTHER INSIGHTS form the presentation.Evolution of Reference Signals for LTE-Advanced Systems
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