codeblk = lteBCH(enb,trblk)
The input argument,
trblk, is a vector
of 24 bits. It represents the information bits delivered to the broadcast
channel (BCH) every 40 ms. The coded output vector,
contains 1920 bits for normal cyclic prefix or 1728 bits for extended
Given the small input size, which is 24, compared with the large output size, which is 1920 or 1728, the rate matching internal to the coding results in a large number of repetitions of the coded block. This repetition is deliberate so that part of a received block can be successfully decoded in isolation. For example, the receiver can recover the BCH bits from the reception of just one frame, ¼ of the transmitted block, rather than waiting 40 ms, or 4 frames, for the full block to be received.
enb— eNodeB cell-wide settingsscalar structure
eNodeB cell-wide settings structure that can contain these parameter fields.
|Parameter Field||Required or Optional||Values||Description|
1, 2, 4
Number of cell-specific reference signal (CRS) antenna ports
Cyclic prefix length
trblk— Transport blocknumeric vector
Transport block, specified as a numeric vector of length 24 bits. This argument represents the transport block delivered to the BCH every 40 ms.