Physical broadcast channel
sym = ltePBCH(enb,cw)
a matrix containing the complex symbols of the Physical Broadcast
Channel (PBCH) for cell-wide settings structure,
sym = ltePBCH(
cw. The function performs all physical
channel processing steps, including the stages of scrambling, QPSK
modulation, layer mapping, and precoding. The size of the output matrix,
CellRefP, where N is
the number of modulation symbols for one antenna port and
the number of antenna ports.
The BCH transport channel consumes information bits every 40 ms. The coded transport block is then passed to PBCH for physical channel processing. The PBCH is transmitted in the first subframe of every frame, so four successive frames are required to transmit one transport block. As the scrambling sequence is initialized at the boundary of every 40 ms, this function expects 40 ms worth of data. For example, it expects 1920 bits for normal cyclic prefix, or 1728 bits for extended cyclic prefix. The output of this function then needs to be demultiplexed into quarter length blocks for carriage on the first subframe in each 10 ms frame.
cw is a vector containing the bit values
of the PBCH codeword for modulation.
Generate physical broadcast channel (PBCH) symbols using the master information block (MIB).
First, generate the MIB for the reference measurement
channel (RMC) R.0, as specified in ,
for cell-wide settings,
enb. Pass the MIB through
broadcast channel (BCH) transport channel coding. Finally, generate
and display the PBCH symbols.
enb = lteRMCDL('R.0'); mib = lteMIB(enb); bchCoded = lteBCH(enb,mib); pbchSymbols = ltePBCH(enb,bchCoded); pbchSymbols(1:10)
0.7071 + 0.7071i 0.7071 - 0.7071i 0.7071 + 0.7071i -0.7071 + 0.7071i -0.7071 + 0.7071i 0.7071 + 0.7071i -0.7071 + 0.7071i -0.7071 + 0.7071i -0.7071 + 0.7071i -0.7071 - 0.7071i
enb— Cell-wide settingsstructure
Cell-wide settings, specified as a structure.
contain the following fields.
NCellID— Physical layer cell identityscalar integer
Physical layer cell identity, specified as a scalar integer.
Number of cell-specific reference signal antenna ports, specified as 1, 2, or 4.
cw— PBCH codewordvector
PBCH codeword, specified as a vector.
the bit values of the PBCH codeword for modulation.
sym— PBCH symbolsnumeric matrix
PBCH symbols, returned as a numeric matrix.
sym contains the complex symbols
of the Physical Broadcast Channel (PBCH) for cell-wide settings,
cw. Its size is N-by-
where N is the number of modulation symbols for
one antenna port and
CellRefP is the number of
Complex Number Support: Yes
 3GPP TS 36.101. "User Equipment (UE) Radio Transmission and Reception." 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA). URL: http://www.3gpp.org.