3GPPFDD DLPhCHSeg

3GPPFDD_DLPhCHSeg

Description: Physical channel segmentation of downlink
Library: 3GPPFDD, TrCH Multiplexers & Coders
Class: SDF3GPPFDD_DLPhCHSeg

Parameters

Pin Inputs

Pin Outputs

Notes/Equations

1. This model is used to implement physical channel segmentation. When more than one PhCH is used, physical channel segmentation divides the bits among the different PhCHs. The bits input to the physical channel segmentation are denoted by x 1, x 2, x 3, ... , x_Y where Y is the number of bits input to the physical channel segmentation block. The number of PhCHs is denoted by P.
   The bits after physical channel segmentation are denoted by u_P 1, u_P 2, u_P 3, ... , u_pU where p is PhCH number and U is the number of bits in one radio frame for each PhCH, i.e.
   .
   The relation between x_k and u_pk is given next.
   For all modes, some bits of the input flow are mapped to each code until the number of bits on the code is V. For modes other than compressed mode by puncturing, all input flow bits are taken to be mapped to the codes. For compressed mode by puncturing, only the bits of the input flow not corresponding to bits p are taken to be mapped to the codes, each bit p is removed to ensure creation of the gap required by the compressed mode, as described next.
   Bits on first PhCH after physical channel segmentation:

   u 1,_k = x_i,k k = 1, 2, ... , U

   Bits on second PhCH after physical channel segmentation:

   u 1,_k = x_i,k+U k = 1, 2, ... , U
   .
   .
   .

   Bits on the Pth PhCH after physical channel segmentation:

   u_P,k = x_{i,k + (P} -1_)U k = 1, 2, ... , U

2. This model fires once per radio frame. Each firing, this model receives a data block of one CCTrCH at pin DataIn. This model will divide the input data block if the physical channel number is more than one, then output the resulting data blocks through multiple pin DataOut.

References

1. 3GPP Technical Specification TS 25.212 V3.9.0, Multiplexing and Channel Coding (FDD) 2002-03, Release 1999.

   http://www.3gpp.org/ftp/Specs/2002-03/R1999/25_series/25212-390.zip