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.

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");
}

File: src/inet/physicallayer/wireless/ieee80211/bitlevel/Ieee80211OfdmInterleaver.ned

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