mrepslotmap.m

OFDMA 物理层开发的matlab 源码.飞思卡尔提供.对物理层开发的工程师有帮助!

function [SlotVecs] = mRepSlotMap(In,SlotVecs,ZoneD,BurstD)
% Downlink repetition and slot mapping for OFDMA of IEEE 802.16 (WiMAX) 
%
%     [SlotVecs] = mRepSlotMap(In,SlotVecs,ZoneD,BurstD)
%
% This module performes the segmentation of the encoded, interleaved and 
% modulation mapped data of one burst (In) into slots. For QPSK, the slots
% are repeated according to the repetition factor R. Then, the slots are
% mapped/added to the slot vectors of the zone (SlotVecs).
%
% In      : burst input matrix (complex)
%           one column per slot, 48 elements per slot
% SlotVecs: input/output matrix that is the IF to FP (complex)
%           one column per slot vector, 48*ZoneD.NumSubch rows
% ZoneD   : zone descriptor
% BurstD  : burst descriptor
%
% Matlab 7 Release 14 SP2

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%  Property of Freescale
%  Freescale Confidential Proprietary
%  Freescale Copyright (C) 2005 All rights reserved
%  ----------------------------------------------------------------------------
%  $RCSfile: mRepSlotMap.m.rca $
%  $Revision: 1.2 $
%  $Date: Wed Nov  8 09:17:22 2006 $
%  Target: Matlab
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

[m,n]=size(In);
[r,c]=size(SlotVecs);

if m~=48
    error('Error: Slots must contain 48 elements.');
end

if (BurstD.IUC==254) %distinguish between MAP and "normal" bursts
   %allocated slots
   Ns = BurstD.Duration;
   %check MAP burst dimension
   if (Ns>(ZoneD.NumSym*ZoneD.NumSubch-BurstD.SymOff)/ZoneD.Type-BurstD.SubchOff)
      error('Error: MAP burst does not fit into zone.');
   end
else  
   %allocated slots
   Ns = BurstD.NumSym*BurstD.NumSubch/ZoneD.Type;
   %check burst dimension
   if mod(BurstD.NumSym,ZoneD.Type)
      error('Error: Number of OFDMA symbols does not match zone type.');
   end
   if ((BurstD.NumSym+BurstD.SymOff)>ZoneD.NumSym)
      error('Error: OFDMA symbol dimension exceeds zone limit.');
   end
   if ((BurstD.NumSubch+BurstD.SubchOff)>ZoneD.NumSubch)
      error('Error: Subchannel dimension exceeds zone limit.');
   end
end

if ((n*BurstD.R)~=Ns)
    error('Error: Number of provided slots and repetition factor are not in line with burst size.');
end

%check zone dimension
if ((ZoneD.NumSym/ZoneD.Type)~=c)
    error('Error: Number of provided slot vectors does not match zone dimension.');
end
if ((ZoneD.NumSubch*48)~=r)
    error('Error: Slot vector length does not match zone dimension.');
end

%repetition
temp=In;
for k=1:(BurstD.R-1),
   temp=[temp;In];
end

%form burst according to burst dimension
if (BurstD.IUC==254) %distinguish between MAP and "normal" bursts
  %MAP burst
  temp=reshape(temp,48,Ns); %one slot per column
  subch=BurstD.SubchOff;
  timeslot=BurstD.SymOff/ZoneD.Type;
  for k=1:Ns,
     SlotVecs(subch*48+1:(subch+1)*48,timeslot+1) = temp(:,k);
     subch=subch+1;
     if subch>=ZoneD.NumSubch
        subch=0;
        timeslot=timeslot+1;
     end
  end
else
  %normal burst
  temp=reshape(temp,BurstD.NumSubch*48,BurstD.NumSym/ZoneD.Type);
  [x,y]=size(temp);
  %map burst in to zone
  RangeCarrier = BurstD.SubchOff*48+1 : BurstD.SubchOff*48+x ;
  RangeSlotVec = BurstD.SymOff/ZoneD.Type+1 : BurstD.SymOff/ZoneD.Type+y ;
  SlotVecs(RangeCarrier,RangeSlotVec) = temp;
end