Adding Rank estimation for TM4.

Right now no feedback, only calculation.
To see the values, enable DEBUG_RANK_EST
in lte_ue_measurements.

openair1/PHY/LTE_TRANSPORT/extern.h

@@ -23,6 +23,8 @@ extern unsigned int dlsch_tbs25[27][25],TBStable[27][110],TBStable1C[32];
 extern unsigned short lte_cqi_eff1024[16];
 extern char lte_cqi_snr_dB[15];
 extern short conjugate[8],conjugate2[8];
+extern short minus_one[8];
+extern short minus_one[8];
 extern short *ul_ref_sigs[30][2][33];
 extern short *ul_ref_sigs_rx[30][2][33];
 extern unsigned short dftsizes[33];

openair1/PHY/LTE_TRANSPORT/proto.h

@@ -1138,6 +1138,58 @@ void dlsch_dual_stream_correlationTM34(LTE_DL_FRAME_PARMS *frame_parms,
                                    int **dl_ch_rho_ext,
                                    unsigned char output_shift0,
                                    unsigned char output_shift1);
+//This function is used to compute multiplications in Hhermitian * H matrix
+void conjch0_mult_ch1(int *ch0,
+                      int *ch1,
+                      int32_t *ch0conj_ch1,
+                      unsigned short nb_rb,
+                      unsigned char output_shift0);
+
+void construct_HhH_elements(int *ch0conj_ch0,
+                         int *ch1conj_ch1,
+                         int *ch2conj_ch2,
+                         int *ch3conj_ch3,
+                         int *ch0conj_ch1,
+                         int *ch1conj_ch0,
+                         int *ch2conj_ch3,
+                         int *ch3conj_ch2,
+                         int32_t *after_mf_00,
+                         int32_t *after_mf_01,
+                         int32_t *after_mf_10,
+                         int32_t *after_mf_11,
+                         unsigned short nb_rb);
+
+void squared_matrix_element(int32_t *Hh_h_00,
+                            int32_t *Hh_h_00_sq,
+                            unsigned short nb_rb);
+
+void dlsch_channel_level_TM34_meas(int *ch00,
+                                   int *ch01,
+                                   int *ch10,
+                                   int *ch11,
+                                   int *avg_0,
+                                   int *avg_1,
+                                   unsigned short nb_rb);
+
+void det_HhH(int32_t *after_mf_00,
+             int32_t *after_mf_01,
+             int32_t *after_mf_10,
+             int32_t *after_mf_11,
+             int32_t *det_fin_128,
+             unsigned short nb_rb);
+
+void numer(int32_t *Hh_h_00_sq,
+           int32_t *Hh_h_01_sq,
+           int32_t *Hh_h_10_sq,
+           int32_t *Hh_h_11_sq,
+           int32_t *num_fin,
+           unsigned short nb_rb);
+
+uint8_t rank_estimation_tm4(int *dl_ch_estimates_00,
+                            int *dl_ch_estimates_01,
+                            int *dl_ch_estimates_10,
+                            int *dl_ch_estimates_11,
+                            unsigned short nb_rb);
 
 void dlsch_channel_compensation_TM56(int **rxdataF_ext,
                                      int **dl_ch_estimates_ext,

openair1/PHY/LTE_TRANSPORT/vars.h

@@ -59,8 +59,10 @@ char lte_cqi_snr_dB[15] = { -2,
 
 unsigned char ue_power_offsets[25] = {14,11,9,8,7,6,6,5,4,4,4,3,3,3,2,2,2,1,1,1,1,1,0,0,0};
 
-short conjugate[8]__attribute__((aligned(16))) = {-1,1,-1,1,-1,1,-1,1} ;
-short conjugate2[8]__attribute__((aligned(16))) = {1,-1,1,-1,1,-1,1,-1} ;
+short conjugate[8]__attribute__((aligned(16))) = {-1,1,-1,1,-1,1,-1,1};
+short conjugate2[8]__attribute__((aligned(16))) = {1,-1,1,-1,1,-1,1,-1};
+short minus_one[8]__attribute__((aligned(16))) = {-1,-1,-1,-1,-1,-1,-1,-1};
+short plus_one[8]__attribute__((aligned(16))) = {1,1,1,1,1,1,1,1};
 
 int qam64_table[8],qam16_table[4];