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WCDMA3G_SSCode


Description: Secondary synchronization code generator
Library: 3GPPFDD 10-99, Common Physical Channels
Class: SDFWCDMA3G_SSCode

Parameters

Name

Description

Default

Type

Range

Index

index of secondary synchronization code

1

int

[0, 16777215]

Pin Outputs

Pin

Name

Description

Signal Type

1

out

secondary synchronization code in one frame

int

2

IndexO

secondary synchronization code index

int

Notes/Equations
  1. This model is used to generate a secondary synchronization code according to its index array.
    Each firing, 256 × 15 tokens of out and 15 tokens of Index are produced.
  2. The secondary synchronization channel (secondary SCH) consists of 15 modulated codes of length 256 chips, the secondary synchronization codes (SSC). Each 256 chips sequence is a secondary synchronization code word, used in one slot.
    Let

    b = <0,0,0,0,0,0,1,1,1,0,1,0,1,0,0,1>. Z = <>.

    Secondary synchronization code words, , , are constructed as the position wise addition modulo 2 of a Hadamard sequence and the sequence Z.
    The Hadamard sequences are obtained as rows of a 256×256 Hadamard matrix H8, depending on the chosen code number i. This word code is chosen from every 16th row of the matrix H8 implying 16 possible code words given by row number i × 16.
    SSC binary code words are converted to real valued sequences by the transformation `0' -> `+1' and `1' -> `−1'.
    Each SSC code consists of 15 different secondary synchronization code words with an index array given in the following table.
    Secondary SCH Code (index i of code Ci)
    SSC Slot Number
    0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
    1 1 1 2 8 9 10 15 8 10 16 2 7 15 7 16
    2 1 1 5 16 7 3 14 16 3 10 5 12 14 12 10
    3 1 2 1 15 5 5 12 16 6 11 2 16 11 15 12
    4 1 2 3 1 8 6 5 2 5 8 4 4 6 3 7
    5 1 2 16 6 6 11 15 5 12 1 15 12 16 11 2
    6 1 3 4 7 4 1 5 5 3 6 2 8 7 6 8
    7 1 4 11 3 4 10 9 2 11 2 10 12 12 9 3
    8 1 5 6 6 14 9 10 2 13 9 2 5 14 1 13
    9 1 6 10 10 4 11 7 13 16 11 13 6 4 1 16
    10 1 6 13 2 14 2 6 5 5 13 10 9 1 14 10
    11 1 7 8 5 7 2 4 3 8 3 2 6 6 4 5
    12 1 7 10 9 16 7 9 15 1 8 16 8 15 2 2
    13 1 8 12 9 9 4 13 16 5 1 13 5 12 4 8
    14 1 8 14 10 14 1 15 15 8 5 11 4 10 5 4
    15 1 9 2 15 15 16 10 7 8 1 10 8 2 16 9
    16 1 9 15 6 16 2 13 14 10 11 7 4 5 12 3
    17 1 10 9 11 15 7 6 4 16 5 2 12 13 3 14
    18 1 11 14 4 13 2 9 10 12 16 8 5 3 15 6
    19 1 12 12 13 14 7 2 8 14 2 1 13 11 8 11
    20 1 12 15 5 4 14 3 26 7 8 6 2 10 11 13
    21 1 15 4 3 7 6 10 13 12 5 14 16 8 2 11
    22 1 16 3 12 11 9 13 5 8 2 14 7 4 10 15
    23 2 2 5 10 16 11 3 10 11 8 5 13 3 13 8
    24 2 2 12 3 15 5 8 3 5 14 12 9 8 9 14
    25 2 3 6 16 12 16 3 13 13 6 7 9 2 12 7
    26 2 3 8 2 9 15 14 3 14 9 5 5 15 8 12
    27 2 4 7 9 5 4 9 11 2 14 5 14 11 16 16
    28 2 4 13 12 12 7 15 10 5 2 15 5 13 7 4
    29 2 5 9 9 3 12 8 14 15 12 14 5 3 2 15
    30 2 5 11 7 2 11 9 4 16 7 16 9 14 14 4
    31 2 6 2 13 3 3 12 9 7 16 6 9 16 13 12
    32 2 6 9 7 7 16 13 3 12 2 13 12 9 16 6
    33 2 7 12 15 2 12 4 10 13 15 13 4 5 5 10
    34 2 7 14 16 5 9 2 9 16 11 11 5 7 4 14
    35 2 8 5 12 5 2 14 14 8 15 3 9 12 15 9
    36 2 9 13 4 2 13 8 11 6 4 6 8 15 15 11
    37 2 10 3 2 13 16 8 10 8 13 11 11 16 3 5
    38 2 11 15 3 11 6 14 10 15 10 6 7 7 14 3
    39 2 16 4 5 16 14 7 11 4 11 14 9 9 7 5
    40 3 3 4 6 11 12 13 6 12 14 4 5 13 5 14
    41 3 3 6 5 16 9 15 5 9 10 6 4 15 4 10
    42 3 4 5 14 4 6 12 13 5 13 6 11 11 12 14
    43 3 4 9 16 10 4 16 15 3 5 10 5 15 6 6
    44 3 4 16 10 5 10 4 9 9 16 15 6 3 5 15
    45 3 5 12 11 14 5 11 13 3 6 14 6 13 4 4
    46 3 6 4 10 6 5 9 15 4 15 5 16 16 9 10
    47 3 7 8 8 16 11 12 4 15 11 4 7 16 3 15
    48 3 7 16 11 4 15 3 15 11 12 12 4 7 8 16
    49 3 8 7 15 4 8 15 12 3 16 4 16 12 11 11
    50 3 8 15 4 16 4 8 7 7 15 12 11 3 16 12
    51 3 10 10 15 16 5 4 6 16 4 3 15 9 6 9
    52 3 13 11 5 4 12 4 11 6 6 5 3 14 13 12
    53 3 14 7 9 14 10 13 8 7 8 10 4 4 13 9
    54 5 5 8 14 16 13 6 14 13 7 8 15 6 15 7
    55 5 6 11 7 10 8 5 8 7 12 12 10 6 9 11
    56 5 6 13 8 13 5 7 7 6 16 14 15 8 16 15
    57 5 7 9 10 7 11 6 12 9 12 11 8 8 6 10
    58 5 9 6 8 10 9 8 12 5 11 10 11 12 7 7
    59 5 10 10 12 8 11 9 7 8 9 5 12 6 7 6
    60 5 10 12 6 5 12 8 9 7 6 7 8 11 11 9
    61 5 13 15 15 14 8 6 7 16 8 7 13 14 5 16
    62 9 10 13 10 11 15 15 9 16 12 14 13 16 14 11
    63 9 11 12 15 12 9 13 13 11 14 10 16 15 14 16
    64 9 12 10 15 13 14 9 14 15 11 11 13 12 16 10

References
  1. 3GP Technical Specification TS 25.213 V3.0.0, "Spreading and Modulation (FDD)," October 1999.
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