AWR1843BOOST: Feature extraction algorithm implementation on Matlab in Vehicle Occupancy Detection demo

function feature= ODDemo_Feature_extract(zone_pair,azimuthHeatMap,feature)
      global zoneDef power_history power_historydB ph_idx;
      oddemo_parms.windowLen= 8;
      ODDEMO_MATRIX_ROW_SIZE= 6;
      ODDEMO_POWER_INIT_VAL= 48.0;
      ODDEMO_MAX_ZONES= 8;
      ODDEMO_ZONE_PAIR= (ODDEMO_MAX_ZONES / 2);
      oddemo_feature= zeros(ODDEMO_ZONE_PAIR);
      oddemo_zone= zoneDef; 
      global oddemo_parms;
      oddemo_meanVec= [30.300249 31.578581 -7.697893 -6.419561 0.306626;
                       31.655145 32.674334 -6.327176 -5.307987 0.451940;
                       31.655145 32.674334 -6.327176 -5.307987 0.451940;
                       24.971068 27.073746 -8.162031 -6.059353 0.101263];
                   
      oddemo_stdVec= [11.033930 12.032618 9.021614 8.202547 0.439775;
                      10.224506 9.922317 7.227706 5.977525 0.483263;
                      10.224506 9.922317 7.227706 5.977525 0.483263;
                      10.738818 8.905771 9.023090 8.420234 0.406470];
      ODDEMO_MAX_FRAME_HIST= 16;

      ODDEMO_MAX_AZIMUTH= 48;
      ODDEMO_MAX_RANGE= 64;

   if zone_pair== 1
       zone= 1;
   else
    zone= ((zone_pair-1) * 2);
   end
    for idx= 1:2
        
%  do 5x5 cell power sums

%         find the max 3x3 area inside the zone
        max= 0;
        heat= azimuthHeatMap + (ODDEMO_MAX_AZIMUTH * oddemo_zone{zone}(1));
        heat= heat + oddemo_zone{zone}(3);

        for rng_idx= 1:oddemo_zone{zone}(2)-2
%              point to the correct range row, then add the starting azimuth index
            for az_idx = 1:oddemo_zone{zone}(4)-2           
              offset = az_idx;
              tmp  = heat(offset) + heat(offset+1) + heat(offset+2);
              offset = offset + ODDEMO_MAX_AZIMUTH;
              tmp= tmp + heat(offset) + heat(offset+1) + heat(offset+2);
              offset= offset + ODDEMO_MAX_AZIMUTH;
              tmp= tmp + heat(offset) + heat(offset+1) + heat(offset+2);

              if (tmp > max)
                max = tmp;
                max_rng = rng_idx; %center position is actually +1, +1
                max_az  = az_idx;
              end            
            end
            heat= heat + ODDEMO_MAX_AZIMUTH;   
        end
%        Save the max positions for output.
        max_rng= max_rng + oddemo_zone{zone}(1) + 1;
        max_az= max_az + oddemo_zone{zone}(3) + 1;
        oddemo_zone{zone}(5) = max_rng;
        oddemo_zone{zone}(6) = max_az;
        sum= 0;
        heat= azimuthHeatMap + (ODDEMO_MAX_AZIMUTH * (max_rng-2));
        heat= heat + max_az - 2;
        ...