insert.m

OFDM降低峰平比采用预失真技术

% insert.m
% linear interpolation
function [table_an,table_pn]=insert(table_an,table_pn,address_i,address_low,address_high)
cap=512;
if address_i==1
    xa=[address_i,(address_high)];
    ya=[table_an(address_i),table_an(address_high)];
    xa1=address_i:address_high;
    ya1=interp1(xa,ya,xa1,'linear');
    for i=address_i:address_high
        table_an(i)=ya1(i);
    end

    xp=[address_i,address_high];
    yp=[table_pn(address_i),table_pn(address_high)];
    xp1=address_i:address_high;
    yp1=interp1(xp,yp,xp1,'linear');
    for i=address_i:address_high
        table_pn(i)=yp1(i);
    end
elseif address_i==cap
    xa=[address_low,address_i];
    ya=[table_an(address_low),table_an(address_i)];
    xa1=address_low:address_i;
    ya1=interp1(xa,ya,xa1,'linear');
    for i=address_low:address_i
        table_an(i)=ya1(i-address_low+1);
    end

    xp=[address_low,address_i];
    yp=[table_pn(address_low),table_pn(address_i)];
    xp1=address_low:address_i;
    yp1=interp1(xp,yp,xp1,'linear');
    for i=address_low:address_i
        table_pn(i)=yp1(i-address_low+1);
    end
else
    xa=[address_low,address_i,(address_high)];
    ya=[table_an(address_low),table_an(address_i),table_an(address_high)];
    xa1=address_low:address_high;
    ya1=interp1(xa,ya,xa1,'linear');
    for i=address_low:address_high
        table_an(i)=ya1(i-address_low+1);
    end

    xp=[address_low,address_i,address_high];
    yp=[table_pn(address_low),table_pn(address_i),table_pn(address_high)];
    xp1=address_low:address_high;
    yp1=interp1(xp,yp,xp1,'linear');
    for i=address_low:address_high
        table_pn(i)=yp1(i-address_low+1);
    end

end