Legacy Preamble PA-Preamble SA-Preamble 20 ms Superframe 5 ms Legacy Radio Frame 5 ms New Radio Frame 5 ms New Radio Frame Frame OFFSET PA-Preamble and Legacy Preamble Occupy Uncorrelated Locations in Frequency Domain Frequency Frequency Sub-carrier Assignment in PA-Preamble Sub-carrier Assignment in Legacy Preamble FIGURE 9-59 Structure of PA-preamble compared to the legacy preamble [2] 512-Point FFT Frequency 1024-Point FFT 2048-Point FFT FIGURE 9-60 The allocation of SA-preamble sequence blocks for different FFT sizes [2] Cyclic Delay Diversity (CDD) with antenna-specific delay values defined for the PA-Preamble and interleaving within a symbol (multiple antennas can transmit within a single symbol but on distinct sub-carriers) for the SA-Preamble (see Figure 9-62). Each SA-Preamble segment uses a carrier-set from the three available carrier-sets in the following manner: segment 0 uses SA-Preamble carrier-seto, segment 1 uses SA-Preamble carrier-setj, and segment 2 uses SA-Preamble carrier-set2. Each Cell ID has an integer value IDcell from 0 to 767. The IDcell parameter is defined by segment index and an index per segment as IDcell = 256n + 2(mmod 128) + [m/128] where n and m are the index of the SA-Preamble carrier-set and a running index from 0 to 255, respectively. The SA-Preamble sequences are partitioned and each partition is dedicated to a specific base station type, such as a macro-cell BS, macro hot-zone BS, or femto BS. The base stations are categorized into macro BS and non-macro BS through hard partition with 258 sequences (86 sequences per segment X 3 segments) dedicated for the macro BS. The non-macro BS information is broadcast in a hierarchical structure which consists of S-SFH SP3 and an AAI_SCD MAC control 9.13 Synchronization channel DC (256) 147 149 152 200 202 205 309 311 314 418 420 423 SA-Preamble Carrier-Seto SA-Preamble Carrier-Set1 SA-Preamble Carrier-Set2 FIGURE 9-61 SA-preamble structure for 512-point FFT [2] Antenna Antenna Ports Antenna Ports FIGURE 9-62 Multi-antenna transmission