Table 12a.3-2 – MCS dependent parameters Mode MCS identifier Data rate (Mb/s) Modulation Spreading factor, LSF FEC type Mode 1 (No channel bonding) 1 1630 OOK 1 RS (240,224) Mode 2 (2 channel bonding) 0 1630 2 1 3260 1 Mode 3 (3 channel bonding) 0 2445 2 1 4890 1 Mode 4 (4 channel bonding) 0 3260 2 1 6519 1 symbols specified in xxxx are included in the calculation of Data rates. RS(240,224) shall be used for encoding the frame payloads of HRCP-OOK. Block length Lblock of PHY payload shall be 512 chips when LSF=1 is used, and Lblock shall be 1024 chips when LSF=2 is used. Pilot symbol length LP shall be 4 bits when LSF=1 is used, and LP shall be 8 bits when LSF=2 is used. 12a.3.2.2 Header rate dependent parameters The header rate dependent parameters shall be set according to Table 12a.3-3 Table 12a.3-3 –Header rate dependent parameters Channel Bonding Header rate (Mb/s) Spreading factor, LSF Pilot symbol length, LP bits per block, LCBPB Number of occupied blocks, Number of stuff bits, LSTUFF No channel bonding 55 OOK 16 0 2 channel bonding 110 OOK
TP Pilot symbol duration 2.273, 1.136, 0.758, 0.568 2.273, 1.515, 1.136 ns LDC Length of data chips per subblock 508 chips Tblock Block duration 290.9 145.5 97.0 72.7 ns Lblock X Tc 12a.3.2.4 Frame-related parameters The frame parameters associated with the HRCP-OOK PHY are listed in Table 12a.3-5 where CEIL is the ceiling function, which returns the smallest integer value greater than or equal to its argument. The maximum frame duration occurs when the number of octets in the PHY Payload field is 8,388,608. Table 12a.3-5 –Frame-related parameters Description Value NSYNC Number of code repetitions in the SYNC sequence 16 TSYNC Duration of the SYNC sequence 1.16 us NSFD Number of code repetitions in the SFD 4 TSFD Duration of the SFD 0.29 us NCES Number of code repetitions in the CES 8 TCES Duration of the CES 0.58 us Npre Number of code repetitions in the PHY preamble 28 Tpre Duration of the PHY preamble 2.036 us
Lhdr Length of the base headers in octets 32 Number of blocks in the base frame header 8 Thdr Duration of the base header Nblock_hdr X Tblock Lpayload Length of frame payloads in octets variable LFCS Length of FCS in octets 4 LMFB Length of the MAC frame body in octets Lpayload + LFCS LCBPS Number of coded bits per block in the MAC frame body 508 Number of blocks for the MAC frame body CEIL[(LMFB X 8)/(RFEC X LCBPS)] (RFEC : FEC rate) TMFB Duration of the MAC frame body including Pilot symbols Nblock_MFB X Tblock Tdatafield Duration of the PHY Payload Nblock_MFB X Tblock Tframe Duration of the frame Tpre + Thdr + Tdatafield 12a.3.2.5 Modulation After channel encoding and spreading, the resulting bits shall be modulated using OOK as specified in 12a.3.2.5.1. 12a.3.2.5.1 OOK HRCP-OOK frames shall be modulated using OOK. The OOK modulation shall use variable amplitudes to represent the data. As shown in Figure 12a.3.2, OOK shall be represented by two points in the constellation map. The simplest form of OOK represents a binary '1' with the presence of the signal, and a binary '0' with the absence of it. The normalization factor, KMOD shall be sqrt(2). Figure 12a.3-2 - Constellation diagram for OOK