Compound Module Ieee80211OFDMInterleaver

Package: inet.physicallayer.ieee80211.bitlevel
File: src/inet/physicallayer/ieee80211/bitlevel/Ieee80211Interleaver.ned

The Ieee80211OFDMInterleaver is defined by a two-step permutation. The first permutation ensures that adjacent coded bits are mapped onto nonadjacent subcarriers. The second ensures that adjacent coded bits are mapped alternately onto less and more significant bits of the constellation and, thereby, long runs of low reliability (LSB) bits are avoided. (IEEE 802.11, 18.3.5.7 Data interleaving)

The module has two modulation dependent parameters: number of coded bits per subcarrier (or constellation size, N_{BPSC}) and number of coded bits per symbol (N_{CBPS}).

The latter is simply N_{BPSC} * number of subcarriers in a symbol.

Usage diagram:

The following diagram shows usage relationships between types. Unresolved types are missing from the diagram.

Inheritance diagram:

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Parameters:

Name Type Default value Description
numberOfCodedBitsPerSymbol int
numberOfCodedBitsPerSubcarrier int

Properties:

Name Value Description
class Ieee80211OFDMInterleaverModule
display i=block/switch

Source code:

// The Ieee80211OFDMInterleaver is defined by a two-step permutation.
// The first permutation ensures that adjacent coded bits are mapped
// onto nonadjacent subcarriers. The second ensures that adjacent coded
// bits are mapped alternately onto less and more significant bits of the
// constellation and, thereby, long runs of low reliability (LSB) bits are
// avoided. (IEEE 802.11, 18.3.5.7 Data interleaving)
//
// The module has two modulation dependent parameters: number of coded bits
// per subcarrier (or constellation size, N_{BPSC}) and number of coded bits
// per symbol (N_{CBPS}).
//
// The latter is simply N_{BPSC} * number of subcarriers in a symbol.
//
module Ieee80211OFDMInterleaver like IInterleaver
{
    parameters:
        int numberOfCodedBitsPerSymbol;
        int numberOfCodedBitsPerSubcarrier;
        @class("Ieee80211OFDMInterleaverModule");
        @display("i=block/switch");
}