tutorial_channels.m

fading 在无线中的应用

function tutorial

    % Create the base stations
    par.cellradius=1000;
    par.sps=1;
    par.km=1;
    par.lm=2;
    par.ncluster=2;

    [xyb,fib,rombvec]=crecells(par.cellradius,par.sps,par.km,par.lm,par.ncluster);

    % Create new mobiles
    par.vmean=10;
    par.amean=5;
    par.dt=10;
   
    nmob=30;
    xym=nans(nmob,1);
    xyv=nans(nmob,1);
    m=(1:nmob).';

    [xym,xyv]=mobmove(xym,xyv,par.vmean,par.amean,par.dt,rombvec);

    % Create the antenna lobe
    lobevector=zeros(360,1);

    % Calculate the gain between bases and mobiles
    par.attconst=-21;
    par.alpha=4;
    par.sigma=8;
    par.raa=0.5;
    par.corrdist=110;

    [lognmap, mapvec] = crelognmap(xyb, rombvec, par.corrdist);
    g=pathgain(xym,xyb,fib,rombvec,par.attconst,par.alpha, par.sigma, par.raa, lobevector, lognmap, mapvec);

    % Create a channel plan
    par.kpc=5;  % The number of channels per cell
    reuseFactor=par.km^2+par.lm^2+par.km*par.lm;
    obk=crechanplan(length(xyb),par.kpc*reuseFactor,par.ncluster);

    % Create the necessary data structures and assign the mobiles to their channels
    b=nans(nmob,1);
    k=nans(nmob,1);
    [b,k,obk]=assign(b,k,g,obk,0);
    
    % Plot the system
    figure(1);
    plothex(xyb,fib);
    hold on;
    plot(xym,'b*');
    hold off;