Scale LDPC and CR to make them both integer

aungkyawthu · Oct 27, 2021 · c54dc80 · c54dc80
1 parent e4073ad
commit c54dc80
Showing 1 changed file with 23 additions and 23 deletions.
diff --git a/core/rtw_mp.c b/core/rtw_mp.c
@@ -3287,54 +3287,54 @@ UINT LDPC_parameter_generator(
 	UINT N_TCB
 )
 {
-	double	CR = 0.;
+	UINT	CR12 = 0;
 	double	N_CW = 0., N_shrt = 0.;
-	double	L_LDPC = 0., K_LDPC = 0.;
+	UINT	L_LDPC_12 = 0, K_LDPC = 0;
 	double	N_punc = 0.;
 	UINT	VHTSIGA2B3  = 0;/* extra symbol from VHT-SIG-A2 Bit 3*/
 
 	if (R == 0)
-		CR	= 0.5;
+		CR12 = 6;
 	else if (R == 1)
-		CR = 2. / 3.;
+		CR12 = 8;
 	else if (R == 2)
-		CR = 3. / 4.;
+		CR12 = 9;
 	else if (R == 3)
-		CR = 5. / 6.;
+		CR12 = 10;
 
 	if (N_TCB <= 648) {
 		N_CW	= 1.;
-		if (N_TCB >= N_pld + 912.*(1. - CR))
-			L_LDPC	= 1296.;
+		if (N_TCB >= N_pld + 76 * (12 - CR12))
+			L_LDPC_12	= 1296 / 12;
 		else
-			L_LDPC	= 648.;
+			L_LDPC_12	= 648 / 12;
 	} else if (N_TCB <= 1296) {
 		N_CW	= 1.;
-		if (N_TCB >= N_pld + 1464.*(1. - CR))
-			L_LDPC	= 1944.;
+		if (N_TCB >= N_pld + 122 * (12 - CR12))
+			L_LDPC_12	= 1944 / 12;
 		else
-			L_LDPC	= 1296.;
+			L_LDPC_12	= 1296 / 12;
 	} else if	(N_TCB <= 1944) {
 		N_CW	= 1.;
-		L_LDPC	= 1944.;
+		L_LDPC_12	= 1944 / 12;
 	} else if (N_TCB <= 2592) {
 		N_CW	= 2.;
-		if (N_TCB >= N_pld + 2916.*(1. - CR))
-			L_LDPC	= 1944.;
+		if (N_TCB >= N_pld + 243 * (12 - CR12))
+			L_LDPC_12	= 1944 / 12;
 		else
-			L_LDPC	= 1296.;
+			L_LDPC_12	= 1296 / 12;
 	} else {
-		N_CW = ceil(N_pld / 1944. / CR);
-		L_LDPC	= 1944.;
+		N_CW = ceil(N_pld / (162 * CR12));
+		L_LDPC_12	= 1944 / 12;
 	}
 	/*	Number of information bits per CW*/
-	K_LDPC = L_LDPC * CR;
-	/*	Number of shortening bits					max(0, (N_CW * L_LDPC * R) - N_pld)*/
+	K_LDPC = L_LDPC_12 * CR12;
+	/*	Number of shortening bits					max(0, (N_CW * L_LDPC_12 * 12 * R) - N_pld)*/
 	N_shrt = (N_CW * K_LDPC - N_pld) > 0. ? (N_CW * K_LDPC - N_pld) : 0.;
 	/*	Number of puncturing bits*/
-	N_punc = (N_CW * L_LDPC - N_TCB - N_shrt) > 0. ? (N_CW * L_LDPC - N_TCB - N_shrt) : 0.;
-	if (((N_punc > .1 * N_CW * L_LDPC * (1. - CR)) && (N_shrt < 1.2 * N_punc * CR / (1. - CR))) ||
-	    (N_punc > 0.3 * N_CW * L_LDPC * (1. - CR))) {
+	N_punc = (N_CW * L_LDPC_12 * 12 - N_TCB - N_shrt) > 0. ? (N_CW * L_LDPC_12 * 12 - N_TCB - N_shrt) : 0.;
+	if (((N_punc > .1 * N_CW * L_LDPC_12 * (12 - CR12)) && (N_shrt < 1.2 * N_punc * CR12 / (12 - CR12))) ||
+	    (N_punc > 0.3 * N_CW * L_LDPC_12 * (12 - CR12))) {
 		VHTSIGA2B3 = 1;
 	} else
 		VHTSIGA2B3 = 0;