 of sub- bands for system bandwidth given by NDL is defined by [NDL /k ]. The "wideband CQI" denotes a CQI value obtained over the set S. For single-antenna port and transmit diversity, as well as open-loop spatial mul- tiplexing and closed-loop spatial multiplexing with RI = 1, a single 4-b wideband CQI is reported. For RI > 1, closed-loop spatial multiplexing PUSCH-based trig- gered reporting includes reporting a wideband CQI that comprises. 5.4.2 Aperiodic/Periodic CQI Reporting Using PUSCH A UE performs aperiodic CQI reporting using the PUSCH upon receiving an indi- cation sent in the scheduling grant. The aperiodic CQI report size and message format are given by radio resource control (RRC). The minimum reporting interval for aperiodic reporting of CQI and PMI is one subframe. In the case of frequency- selective CQI and PMI reports, the sub-band size for CQI and PMI is the same. The sub-band size for CQI and PMI is the same for transmitter-receiver configurations with and without precoding. © 2009 by Taylor & Francis Group, LLC MIMO OFDM Schemes for 3GPP LTE Table 5.8 Sub-Band Size versus DL System Bandwidth System Bandwidth Sub-Band Size (Wideband CQI only) 11-26 27-64 64-110 A UE is semistatically configured by higher layers to feed back CQI on the PUSCH using one of the following CQI reporting types: wideband feedback A UE should report one wideband CQI value. higher-layer-configured sub-band feedback A UE should report a wideband CQI and one CQI for each sub-band in the set of sub-bands (S) semistatically configured by higher layers. Sub-band CQIs are encoded differentially with respect to the wideband CQIs using 3 b. Supported sub-band size (k) includes those given in Table 5.8. The k val- ues are semistatically configured by higher layers as a function of system bandwidth. UE-selected sub-band feedback The UE should select the M best sub-bands of size k (where k and M are given in Table 5.9 for each system bandwidth range) within the set of sub-bands S semistatically configured by higher layers and rep