diff --git a/openair1/SIMULATION/NR_PHY/ulsim.c b/openair1/SIMULATION/NR_PHY/ulsim.c
index 624351d160aa224d1b11107c4f7f13efc0f53631..2a3730c1d4695bc556a01bca018558c69e847461 100644
--- a/openair1/SIMULATION/NR_PHY/ulsim.c
+++ b/openair1/SIMULATION/NR_PHY/ulsim.c
@@ -607,7 +607,7 @@ int main(int argc, char **argv)
       printf("-f Number of frames to simulate\n");
       printf("-g [A,B,C,D,E,F,G] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) models (ignores delay spread and Ricean factor)\n");
       printf("-h This message\n");
-      printf("-i Change channel estimation technique. Arguments list: Frequency domain {0:Linear interpolation, 1:PRB based averaging}, Time domain {0:Estimates of last DMRS symbol, 1:Average of DMRS symbols}\n");
+      printf("-i Change channel estimation technique. Arguments list: Number of arguments=2, Frequency domain {0:Linear interpolation, 1:PRB based averaging}, Time domain {0:Estimates of last DMRS symbol, 1:Average of DMRS symbols}. e.g. -i 2 1 0\n");
       //printf("-j Relative strength of second intefering eNB (in dB) - cell_id mod 3 = 2\n");
       printf("-s Starting SNR, runs from SNR0 to SNR0 + 10 dB if ending SNR isn't given\n");
       printf("-m MCS value\n");
@@ -633,8 +633,8 @@ int main(int argc, char **argv)
       printf("-t Acceptable effective throughput (in percentage)\n");
       printf("-S Ending SNR, runs from SNR0 to SNR1\n");
       printf("-P Print ULSCH performances\n");
-      printf("-T Enable PTRS, arguments list L_PTRS{0,1,2} K_PTRS{2,4}, e.g. -T 2 0 2 \n");
-      printf("-U Change DMRS Config, arguments list: DMRS Mapping Type{0=A,1=B}, DMRS AddPos{0:3}, DMRS Config Type{1,2}, Number of CDM groups without data{1,2,3} e.g. -U 4 0 2 0 1 \n");
+      printf("-T Enable PTRS, arguments list: Number of arguments=2 L_PTRS{0,1,2} K_PTRS{2,4}, e.g. -T 2 0 2 \n");
+      printf("-U Change DMRS Config, arguments list: Number of arguments=4, DMRS Mapping Type{0=A,1=B}, DMRS AddPos{0:3}, DMRS Config Type{1,2}, Number of CDM groups without data{1,2,3} e.g. -U 4 0 2 0 1 \n");
       printf("-Q If -F used, read parameters from file\n");
       printf("-Z If -Z is used, SC-FDMA or transform precoding is enabled in Uplink \n");
       printf("-W Num of layer for PUSCH\n");