minimum code rate of 1/3, as defined in reference [1]. The CTC scheme has been extended to support additional FEC block sizes. Furthermore, FEC block sizes can be regularly increased with predetermined block size resolutions. The performance of adaptive modulation generally suffers from the power inefficiencies of multilevel modulation formats. This is due to the variations in bit reliabilities caused by the bitmapping onto the signal constellation. To overcome this issue, a constellation-rearrangement scheme is utilized where signal constellation of QAM signals between re-transmissions is rearranged, i.e., the mapping of the bits into the complex-valued symbols between successive HARQ re-transmissions is changed, resulting in averaging bit reliabilities over several re-transmissions and lower packet error rates. The mapping of bits to the constellation point depends on the constellation-rearrangement type used for HARQ re-transmissions and may also depend on the MIMO scheme. The complex-valued modulated symbols are mapped to the input of the MIMO encoder. Incremental redundancy HARQ is used in determining the starting position of the bit selection for HARQ re-transmissions. The supported physical layer burst sizes NDB are listed in Table 9-6. The burst size is inclusive of the burst CRC. Other burst sizes require padding to the next burst size. When the burst size including 16-bit burst CRC bits exceeds the maximum FEC block size, the burst is partitioned into KFB FEC blocks. The burst size index is calculated as index = Iminimum-size Isize-offset+ where size-offset {0,1, 31} a 5-bit index is signaled through A-MAP IE and Iminimum-size is calculated based on the allocation size as shown in Table 9-7. The allocation size is defined as the number of logical resource units multiplied by the MIMO rank, which are allocated to the burst. In the case of long-TTI (i.e., concate- nation of an integer number of subframes), the number of logical resource units is calculated as the number of subframes in TTI multiplied by t