Feedback Strategies in LTE Systems

In this chapter, we consider feedback strategies for Long Term Evolution (LTE) and LTE-Advanced based wireless communications systems. We first give an overview on LTE standard including frame structure, transmission modes and reference signals for the different releases. We introduce respectively link adaptation considering and channel measurement reporting modes including channel quality information (CQI), precoding matrix index (PMI) and rank indicator (RI). Single user and multiuser MIMO strategies and multicell MIMO transmission schemes including static and dynamic coordination techniques are then reviewed. Finally, design criteria and codebook constructions for downlink and uplink transmission are described in detail.

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