Added generic for bypassing the prefilter.

libraries/dsp/wpfb/src/vhdl/wpfb_unit.vhd

@@ -63,6 +63,7 @@ use work.wpfb_pkg.all;
 entity wpfb_unit is
   generic (
     g_wpfb              : t_wpfb            := c_wpfb;
+    g_use_prefilter     : boolean           := TRUE;
     g_stats_ena         : boolean           := TRUE;    -- Enables the statistics unit
     g_use_bg            : boolean           := FALSE;
     g_file_index_arr    : t_nat_natural_arr := array_init(0, 128, 1);
@@ -88,7 +89,7 @@ end entity wpfb_unit;
 
 architecture str of wpfb_unit is
 
-  constant c_nof_stats       : natural := g_wpfb.nof_points/g_wpfb.wb_factor;
+  constant c_nof_stats       : natural := 2**g_wpfb.nof_chan * g_wpfb.nof_points/g_wpfb.wb_factor;
 
   constant c_fil_ppf         : t_fil_ppf := (g_wpfb.wb_factor,
                                              g_wpfb.nof_chan,
@@ -235,6 +236,7 @@ begin
     ---------------------------------------------------------------
     -- THE POLY PHASE FILTER
     ---------------------------------------------------------------
+    gen_prefilter : IF g_use_prefilter = TRUE generate
       u_filter : entity filter_lib.fil_ppf_wide
       generic map (
         g_fil_ppf           => c_fil_ppf,
@@ -254,9 +256,15 @@ begin
         out_dat_arr    => fil_out_arr,
         out_val        => fil_out_val
       );
+    end generate;
 
-    fft_in_val <= fil_out_val; 
+    -- Bypass filter
+    gen_no_prefilter : if g_use_prefilter = FALSE generate
+      fil_out_arr <= fil_in_arr;
+      fil_out_val <= r.in_sosi_arr(0).valid;
+    end generate;
 
+    fft_in_val <= fil_out_val;
 
     ---------------------------------------------------------------
     -- THE WIDEBAND FFT