ried on PBCH which contains the basic physical layer information such as system bandwidth, number of transmit antennas, and system frame number must be detected. CHAPTER 9 The IEEE 802.16m Physical Layer (Part I) 9.15.11 PDSCH Transmission Modes The eNB determines the downlink transmit energy per resource element. A UE may assume downlink cell-specific RS Energy per Resource Element (EPRE) is constant across the downlink system band- width and constant across all subframes until a different cell-specific RS power information is received. The downlink reference-signal EPRE can be derived from the downlink reference-signal transmit- power given by the parameter reference-signal-power provided by higher layers. The downlink reference-signal transmit power is defined as the linear average over the power contributions of resource elements that carry cell-specific reference signals within the operating system bandwidth. The UE is semi-statically configured via higher layer signaling to receive PDSCH data transmissions signaled via PDCCH according to one of eight transmission modes denoted by mode 1 to mode 8. In FDD mode, the UE is not expected to receive PDSCH resource blocks transmitted on antenna port 5 in any subframe in which the number of OFDM symbols for PDCCH with normal CP is equal to four. Furthermore, the UE is not expected to receive PDSCH resource blocks transmitted on antenna port 5, 7, or 8 in the two PRBs to which a pair of VRBs is mapped if either one of the two PRBs Detection of Carrier Frequency Detection of SCH Symbol Timing Cell ID Identification Detection of Radio Frame Timing Cell ID Group Identification Detection of Multi-antenna Configuration used for PBCH Detection Detection of CP Length for Subframe to which PBCH is Mapped FIGURE 9-80 Cell search procedure 9.15 3GPP LTE physical layer protocols overlaps in frequency with a transmission of either PBCH or primary or secondary synchronization signals in the same subframe. The UE is also not expected to receive PDSCH resource blocks transmitted o