Home > WaveComBox > Toolbox > F_OFDM > F_OFDM_InitializeChainParameters.m

F_OFDM_InitializeChainParameters

PURPOSE ^

Initializes modulation parameters to default values.

SYNOPSIS ^

function [ Para ] = F_OFDM_InitializeChainParameters( )

DESCRIPTION ^

 Initializes modulation parameters to default values.

 function [ Para ] = F_OFDM_InitializeChainParameters(  )

 Input arguments: none

 Outputs arguments:

   Para: modulation parameters

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function [ Para ] = F_OFDM_InitializeChainParameters(  )
0002 % Initializes modulation parameters to default values.
0003 %
0004 % function [ Para ] = F_OFDM_InitializeChainParameters(  )
0005 %
0006 % Input arguments: none
0007 %
0008 % Outputs arguments:
0009 %
0010 %   Para: modulation parameters
0011 %
0012 
0013 % This file is part of WaveComBox: www.wavecombox.com and is distributed under
0014 % the terms of the MIT license. See accompanying LICENSE file.
0015 % Original author: Mathieu Van Eeckhaute, September 26, 2018.
0016 % Contributors:
0017 % Change log:
0018 
0019 Para.Modulation= 'F-OFDM';
0020 Para.nSubcarriers=1024; % Number of subcarriers
0021 Para.SubBandWidth= 150;        %number of subcarriers per subband
0022 Para.NsubBands= 4;          %number of subbands
0023 Para.guard_subcar = 0; %number of guard subcarriers between each block
0024 Para.L = Para.nSubcarriers/2+1;  %Length of the sub-band FIR filters
0025 Para.dW = 2.5; %Tone offset
0026 Para.Ns = 100; % Number of OFDM multicarrier symbols
0027 Para.T = 1/15e3; % OFDM multicarrier symbol period [s]
0028 Para.CP = 72/Para.nSubcarriers; % duration of the cyclic prefix as a fraction of the symbol period
0029 Para.CenterFrequency = 1e9; % Center frequency of the transmitted signal [Hz]
0030 Para.Velocity = 0; % Velocity [km/h]
0031 
0032 %Derived parameters
0033 Para.M = Para.SubBandWidth*Para.NsubBands; %nb of used subcarriers
0034 Para.ActiveSubcarriers = zeros(1, Para.M);
0035 for iSubBand = 1:Para.NsubBands
0036     Para.ActiveSubcarriers((iSubBand-1)*Para.SubBandWidth+1 : (iSubBand)*Para.SubBandWidth) = (iSubBand-1)*(Para.SubBandWidth+...
0037         Para.guard_subcar)+1:(iSubBand-1)*(Para.SubBandWidth+Para.guard_subcar)+Para.SubBandWidth;
0038 end
0039 Para.ActiveSubcarriers = Para.ActiveSubcarriers+(Para.nSubcarriers-(Para.SubBandWidth+Para.guard_subcar)*Para.NsubBands)/2;
0040 Para.SubBandSCset    = reshape(Para.ActiveSubcarriers, Para.SubBandWidth, Para.NsubBands);
0041 
0042 Para.N_T=1; % Number of transmitted antennas
0043 Para.N_R=1; % Number of received antennas
0044 Para.S=1; % Number of spatial streams
0045 
0046 Para.Es_N0_dB=15; % Signal-to-noise ratio [dB]
0047 Para.Es=1; % Symbol energy
0048 Para.M_QAM=4; % QAM modulation order
0049 
0050 % Parameters of the preamble
0051 Para.PreamblePilotSubcarriers=[]; % Pilot subcarriers in the preamble
0052 Para.PreambleLength=0; % Length of the preamble [T]
0053 
0054 % Parameters of scattered pilots
0055 Para.ScatteredPilotSubcarriers=[]; % Pilot subcarriers in the data frame
0056 Para.ScatteredPilotSymbols=[];
0057 Para.Ep=0; % Energy of the scattered pilot symbols
0058 
0059 end
0060

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