e of B-IFDMA Occupied Bandwidth > 80% of the nominal channel bandwidth First RB Last RB Occupied bandwidth Channel bandwidth Power spectral density (PSD) per MHz limits maximum output power (10 dBm/MHz) 23 dBm total power with transmit power control (TPC) Guard band Occupied bandwidth (LTE channel) 6 PRB allocation 6 PRB allocation Figure 8.34 ETSI requirements for transmission 5 GHz band [22,27,29]. Operation in Unlicensed and Shared Spectrum Single subframe scheduling Multi subframe scheduling Figure 8.35 Multi-subframe scheduling versus single subframe scheduling [23]. for eLAA. The available number of resource blocks is organized in interlaces that are equally spaced in the frequency domain. A UE can now transmit on one or multiple inter- laces. Similar to LTE uplink transmissions, the total number of allocated resource blocks must be multiples of 2, 3, and 5 to minimize the complexity of the DFT precoding. To incorporate this specific access mode into the standard, 3GPP Rel-14 specified a new uplink resource allocation type 3 that is only applicable for LAA. As a result, two new scheduling grants (DCI format 0A/0B and 4A/4B) were introduced. A DCI transports downlink, uplink or sidelink scheduling information, requests for aperiodic CQI reports, LAA common infor- mation, or uplink power control commands for one cell and one RNTI. The RNTI is implic- itly encoded in the CRC. DCI formats 0A and 4A schedule single subframes for single antenna (OA) and multi-antenna (4A) transmission, whereas DCI formats OB and 4B allow scheduling of up to four consecutive subframes for SISO and MIMO, respectively. These new uplink grants provide the UE with a resource indication value RIV that is either 5 or 6 bits (5 bits for 10 MHz channel and 6 bits for 20 MHz channel). The RIV represents a start value RB start and the actual number of allocated resource blocks L. For a 20 MHz LTE channel, corresponding to 100 resource blocks, there are 10 interlaces with 10 RBs/inter- lace. Interlace 0 contains resource blocks (0, 10, 20, 3