2 4 6 8 Number of pilot subcarrier per OFDM symbol NSP Total number of useful subcarriers per OFDM 26 NST symbol Highest data subcarrier index per OFDM 13 NSR symbol 31.25 kHz Subcarrier frequency spacing F 32 s = 1/F IDFT/DFT period TDFT 8 s Guard interval duration TGI = TDFT/4 16 s Double guard interval TDGI 4 s Short guard interval duration TSGI = TDFT/8 Duration of OFDM symbol with normal guard 40 s 1.25 TSYML = TDFT + TGI = TDFT interval Duration of OFDM symbol with short guard 36 s 1.125 TSYMS = TDFT + TGIS = TDFT interval or depending on the TSYML TSYMS OFDM symbol duration TSYM GI used 160 s 4 80 s 2 = = STF field duration TSTF TSYML TSYML n.a. 40 s MHz long preamble D-STF duration TDSTF = TSYML ≥2 160 s 4 80 s 2 = TDFT = LTF field duration TLTF1 + 2 + + TGI TGI2 TDFT TGI2 40 s Second and subsequent LTF field duration TLTFs = TSYML n.a. 40 s MHz long preamble D-LTF field duration = TSYML ≥2 240 s 6 80 s 2 = = SIG field duration TSIG TSYML TSYML n.a. 80 s 2 MHz long preamble SIGA field duration TSIGA = ≥2 n.a. 40 s MHz long preamble SIGB field duration TSIGB = TSYML ≥2 3.9 S1G PLME 3.9.1 PHY characteristics [12/1104r2, September 2012 meeting minutes] Characteristics Value aSlotTime 52 us
NSP 2 4 6 8 Number of pilot subcarrier per OFDM symbol NST 26 Total number of useful subcarriers per OFDM symbol NSR 13 Highest data subcarrier index per OFDM symbol F 31.25 kHz Subcarrier frequency spacing TDFT 32 s = 1/F IDFT/DFT period TGI 8 s = TDFT/4 Guard interval duration TDGI 16 s Double guard interval TSGI 4 s = TDFT/8 Short guard interval duration TSYML 40 s = TDFT + TGI = 1.25 TDFT Duration of OFDM symbol with normal guard interval TSYMS 36 s = TDFT + TGIS = 1.125 TDFT Duration of OFDM symbol with short guard interval TSYM TSYML or TSYMS depending on the GI used OFDM symbol duration TSTF 160 s = 4 TSYML 80 s = 2 TSYML STF field duration TDSTF n.a. 40 s = TSYML ≥2 MHz long preamble D-STF duration TLTF1 160 s = 4 TDFT + 2 TGI + TGI2 80 s = 2 TDFT + TGI2 LTF field duration TLTFs 40 s = TSYML Second and subsequent LTF field duration n.a. 40 s = TSYML ≥2 MHz long preamble D-LTF field duration TSIG 240 s = 6 TSYML 80 s = 2 TSYML SIG field duration TSIGA n.a. 80 s = 2 ≥2 MHz long preamble SIGA field duration TSIGB n.a. 40 s = TSYML ≥2 MHz long preamble SIGB field duration 3.9 S1G PLME 3.9.1 PHY characteristics [12/1104r2, September 2012 meeting minutes] Characteristics Value aSlotTime 52 us
11-11-1137-15-00ah-specification-framework-for-tgah.docx