al number of streams in the transmission and the index of the dedicated pilot stream are indicated in the DL Basic Assignment A-MAP IE, DL Persistent Allocation A-MAP IE, or DL Sub-band Assignment A-MAP IE. The channel estimation for demod- ulation of data burst at an MS is performed by taking the following rules into consideration: The dual stream non-adaptively precoded common pilots across the distributed LRU should be used for channel estimation by all mobile stations allocated a burst in the distributed LRU. Within each frequency partition, all pilots are shared by all mobile stations for demodulation in the distributed LRU. Only the pilots located within a physical sub-band should be used for channel estimation within that sub-band. The MS should use its dedicated pilot streams for channel estimation in the contiguous allocation. The pilots are not shared by mobile stations for demodulation in contiguous LRU whether they are non-adaptively or adaptively precoded. 9.9 Pilot structure and channel estimation ---6 OFDM Symbols -6 OFDM Symbols --6 OFDM Symbols Pilot Pattern Set 0 Pilot Pattern Set 1 Pilot Pattern Set 2 Unused Sub-carrier FIGURE 9-36 Collision-free interlaced pilot pattern for subframe type 1 (2) MIMO feedback measurements make use of non-precoded and/or precoded pilots at the MS. For MIMO feedback reports requested with a MIMO feedback mode for operation in an open-loop region, measurements are conducted on the k < min(Nt, Nr) streams non-adaptively precoded pilots in that open-loop region. All pilots are shared by all mobile stations for MIMO feedback measurements in each open-loop region. The wideband Channel Quality Indicator (CQI)iv reports iv i Channel Quality Indicator (CQI) is a measure of quality of wireless channels as experienced by a mobile station. The CQI metric can be expressed as a value (or values) representing a measure of channel quality for a given channel. Typically, a high value CQI is indicative of a channel with high quality. The CQI for a communication link can be compute