function complete=interpolate_2x2(index,value,method,TxNum);
% index: value's point location
% value: underlying function
% method: used in matlab funcion interp1,such as 'linear','spline','cubic'
% TxNum: string indicating Tx Antenna number

switch TxNum,
    case 'Tx1',     % Need remove DC before interpolate
        value(426)=[];
        index(426)=[];
        complete=interp1(index,value,2:1702,method);
        complete=[complete(1),complete,complete(end)];
    case 'Tx2',
        complete=interp1(index,value,1:1703,method);
    otherwise,
        error('Unknown Tx Antenna!');
end