d-loop Stream Indicator This parameter is used in open-loop MU-MIMO to indentify the spatial stream for CQI estimation STC Rate Indicator 2, 3, 5, 6 PFBCH Indicator 2, 3, 5, 6 One bit indicator is used to indicate transmission of PFBCH in the next SFBCH opportunity. In the transmission of PFBCH, Encoding Type 0 is used. The differential PMI is encoded with 2, 4, or 4 bits when the BS uses 2, 4, or 8 transmit antennas, respectively. When the MS estimates PMI using the midamble, it should consider channel variations and report the PMI with reference to the frame the PMI has reported, i.e., if the reported PMI in frame n is based on the measurements conducted on the midamble in frame n - 1 or earlier, the appropriate value of PMI for frame n should be estimated and reported. Figure 10-13 shows two example timing diagrams for uplink fast-feedback channels to visualize the operation assuming certain values for the parameters obtained from Feedback Allocation A-MAP The physical structure of the uplink fast-feedback channels can be described as follows. An uplink Table 10-18 The Modulation and Coding of the CQI Channel [2] MCS Index Modulation Code Rate 31/256 48/256 71/256 101/256 135/256 171/256 16 QAM 102/256 16 QAM 128/256 16 QAM 155/256 16 QAM 184/256 64 QAM 135/256 64 QAM 157/256 64 QAM 181/256 64 QAM 205/256 64 QAM 225/256 64 QAM 237/256 CHAPTER 10 The IEEE 802. 16m Physical Layer (Part II) Frame # 4i+10 4i+11 CQI Report A # CQI Report B # CQI for Reuse 1 CQI for Reuse 3 Short-term Long-termReport B Punctures Short-term Allocation Period (p=1) Report= 2 Short-termReport A at every 4th Long-term Allocation Period (q=0) Frames Frame Number of Reports (n=2) Frame # 8i+10 8i+11 8i+12 8i+13 8i+14 8i+15 CQI Report A # CQI Report B # Shortiterm CQI for MIMO Mode Report=2 Frames Note: Ai+4 = Ai+3 SM (Rank 2) Long-term Report B Punctures Short-term Short-term Allocation Period (p=1) CQI for MIMO Mode Report A at every Frame Long-term Allocation Period (q=1) Number of Reports (n=2) FIGURE 10-13 An example of primary and se