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3GPPFDD_HS_CQI_Encoder


Description: Channel encoder for channel quality information
Library: 3GPPFDD, TrCH Multiplexers & Coders
Class: SDF3GPPFDD_HS_CQI_Encoder
Derived From: 3GPPFDD_HS_CQI_Coding

Parameters

Name

Description

Default

Type

SpecVerHSDPA

version of HSDPA specifications: Version_09_03

Version_09_03

enum

CQI_Type

CQI type: Decimal, Binary

Binary

enum

Pin Input

Pin

Name

Description

Signal Type

1

CQI_B

channel quality information bits

int

Pin Output

Pin

Name

Description

Signal Type

2

CQI_S

channel quality information symbols

int

Notes/Equations
  1. This model codes the channel quality information using a (20,5) code.
  2. Each firing, if CQI_Type is Decimal, 20 CQI_S tokens are produced when 1 CQI_B token consumed; if CQI_Type is Binary, 20 CQI_S tokens are produced when 5 CQI_B tokens consumed.
  3. The (20,5) code words are a linear combination of the 5 basis sequences denoted Mi,n defined in the following table.
    Basis Sequences for (20,5) Code

    i

    Mi,0

    Mi,1

    Mi,2

    Mi,3

    Mi,4

    0

    1

    0

    0

    0

    1

    1

    0

    1

    0

    0

    1

    2

    1

    1

    0

    0

    1

    3

    0

    0

    1

    0

    1

    4

    1

    0

    1

    0

    1

    5

    0

    1

    1

    0

    1

    6

    1

    1

    1

    0

    1

    7

    0

    0

    0

    1

    1

    8

    1

    0

    0

    1

    1

    9

    0

    1

    0

    1

    1

    10

    1

    1

    0

    1

    1

    11

    0

    0

    1

    1

    1

    12

    1

    0

    1

    1

    1

    13

    0

    1

    1

    1

    1

    14

    1

    1

    1

    1

    1

    15

    0

    0

    0

    0

    1

    16

    0

    0

    0

    0

    1

    17

    0

    0

    0

    0

    1

    18

    0

    0

    0

    0

    1

    19

    0

    0

    0

    0

    1

    The CQI values 0 to 30 (defined in [2]) are converted from decimal to binary to map them to the channel quality information bits (1 0 0 0 0) to (1 1 1 1 1) respectively. (Information bit pattern (0 0 0 0 0) is not used.) The channel quality information bits are a0, a1, a2, a3, a4 (where a0 is LSB and a4 is MSB). The output code word bits bi are given by:

    where i = 0, ..., 19.

References
  1. 3GPP Technical Specification TS 25.212 V5.6.0, "Multiplexing and channel coding (FDD)," Release 5.
  2. 3GPP Technical Specification TS 25.214 V5.6.0, "Physical layer procedures (FDD)," Release 5.
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