Fixed memory leak in PRACH and ZC root index table lookup

lte/phy/lib/phch/src/prach.c

@@ -198,11 +198,11 @@ int prach_gen_seqs(prach_t *p)
     if(v > v_max){
       // Get a new root sequence
       if(4 == p->f){
-        u = prach_zc_roots_format4[p->rsi + p->N_roots];
+        u = prach_zc_roots_format4[(p->rsi + p->N_roots)%138];
       }else{
-        u = prach_zc_roots[p->rsi + p->N_roots];
+        u = prach_zc_roots[(p->rsi + p->N_roots)%838];
       }
-
+      printf("Seq#%d, u: %3d (rsi: %d, n_roots: %d\n", i, u, p->rsi, p->N_roots);
       for(int j=0;j<p->N_zc;j++){
         double phase = -M_PI*u*j*(j+1)/p->N_zc;
         root[j] = cexp(phase*I);
@@ -493,8 +493,9 @@ int prach_detect(prach_t *p,
   return ret;
 }
 
-int prach_free(prach_t *p){
+int prach_free(prach_t *p) {
   free(p->prach_bins);
+  free(p->corr_spec);
   free(p->corr);
   dft_plan_free(p->ifft);
   free(p->ifft);

lte/phy/lib/phch/test/prach_test_mex.c

@@ -89,7 +89,7 @@ void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
     return;
   }
 
-  uint32_t nof_samples = lte_sampling_freq_hz(n_ul_rb) * 0.001;
+  uint32_t nof_samples = lte_sampling_freq_hz(n_ul_rb) * 0.003;
   
   cf_t *signal = vec_malloc(sizeof(cf_t) * nof_samples);
   if (!signal) {
@@ -107,6 +107,10 @@ void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
     mexutils_write_cf(signal, &plhs[0], nof_samples, 1);  
   }
   
+  free(signal);
+  
+  prach_free(&prach);
+  
   return;
 }
 

matlab/tests/prach_test.m

@@ -4,16 +4,16 @@ prachConfig=struct('Format',0,'SeqIdx',0,'PreambleIdx',0,'CyclicShiftIdx',0,'Hig
 
 addpath('../../debug/lte/phy/lib/phch/test')
 
-NULRB=[6 15 25 50 100];
+NULRB=[15 25 50 100];
 
 % FreqIdx, FreqOffset and TimeOffset need to be tested
 
 for n_rb=1:length(NULRB)
-    for format=0:3
-        for seqIdx=0:837
-            fprintf('format %d, seqIdx: %d\n',format,seqIdx);
-            for preambleIdx=0:63
-                for CyclicShift=0:15
+    for format=1:3;
+        for seqIdx=0:17:837
+            fprintf('RB: %d, format %d, seqIdx: %d\n',NULRB(n_rb),format,seqIdx);
+            for preambleIdx=0:23:63
+                for CyclicShift=0:6:15
                     %for hs=0:1
                     hs=0;
                         ueConfig.NULRB=NULRB(n_rb);
@@ -22,16 +22,17 @@ for n_rb=1:length(NULRB)
                         prachConfig.PreambleIdx=preambleIdx;
                         prachConfig.CyclicShiftIdx=CyclicShift;
                         prachConfig.HighSpeed=hs;
-
-                        [mat, info]=ltePRACH(ueConfig,prachConfig);
-
+                        prachConfig.FreqIdx=5;
+                        prachConfig.FreqOffest=5;
                         lib=liblte_prach(ueConfig,prachConfig);
-                         err=mean(abs(mat(:)-lib(:)));
-                         if (err > 10^-3)
-                             disp(err)    
-                             error('Error!');
-                         end
-                  %  end
+                        
+                        [mat, info]=ltePRACH(ueConfig,prachConfig);
+                        err=mean(abs(mat(:)-lib(1:length(mat))));
+                        if (err > 10^-3)
+                            disp(err)    
+                            error('Error!');
+                        end
+                    %end
                 end
             end
         end