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add DVB-C strength and quality

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This commit is contained in:
Ralph Metzler 2016-03-23 22:03:54 +01:00
parent f681505267
commit 65011d39ca
1 changed files with 90 additions and 82 deletions
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86
octoserve/dvb.c
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@ -733,7 +733,7 @@ int32_t dvbs2q(int32_t snr, uint32_t fec, uint32_t mod,
};
int32_t BERQuality = berq_bch(ber_num, ber_den);
int32_t Quality = 0;
int32_t SignalToNoiseRel = -1000, snc;
int32_t SignalToNoiseRel = -1000, snc = 0;
if (fec > FEC_2_5 )
return 0;
@ -785,61 +785,67 @@ static int32_t dvbcq(int32_t snr, uint32_t mod,
Quality = ((SignalToNoiseRel + 70) * BERQuality) / 100;
else
Quality = BERQuality;
return (Quality * 3) / 20;}
return (Quality * 3) / 20;
}
#if 0
int32_t CDigitalDemodulator::DVBTQuality(int32_t SignalToNoise,DVBT_Constellation Constellation,DVBT_CodeRate CodeRate,uint32_t BERNominator, uint32_t BERDenominator )
int32_t dvbtq(int32_t snr, uint32_t mod, uint32_t fec,
uint32_t ber_num, uint32_t ber_den)
{
int32_t Quality = 0;
int32_t BERQuality = BERQualityRS(BERNominator, BERDenominator);
int32_t SignalToNoiseRel = -1000;
int32_t BERQuality = berq_rs(ber_num, ber_den);
int32_t SignalToNoiseRel = -1000, snc = 0;
// SNR Values for quasi error free reception from Nordig 2.2
static const int32_t QE_SN[] =
{
51, // QPSK 1/2
69, // QPSK 2/3
79, // QPSK 3/4
89, // QPSK 5/6
97, // QPSK 7/8
108, // 16-QAM 1/2
131, // 16-QAM 2/3
146, // 16-QAM 3/4
156, // 16-QAM 5/6
160, // 16-QAM 7/8
165, // 64-QAM 1/2
187, // 64-QAM 2/3
202, // 64-QAM 3/4
216, // 64-QAM 5/6
225, // 64-QAM 7/8
static const int32_t DVBT_SN_QPSK[] = {
// 1/2 2/3 3/4 4/5 5/6 6/7 7/8 8/9 AUT 3/5 9/10 2/5
0, 51, 69, 79, 0, 89, 0, 97, 0, 0, 0, 0, 0,
};
static const int32_t DVBT_SN_QAM16[] = {
// 1/2 2/3 3/4 4/5 5/6 6/7 7/8 8/9 AUT 3/5 9/10 2/5
0, 108, 131, 146, 0, 156, 0, 160, 0, 0, 0, 0, 0,
};
static const int32_t DVBT_SN_QAM64[] = {
// 1/2 2/3 3/4 4/5 5/6 6/7 7/8 8/9 AUT 3/5 9/10 2/5
0, 165, 187, 202, 0, 216, 0, 225, 0, 0, 0, 0, 0,
};
if( Constellation <= DVBT_64QAM && CodeRate <= DVBT_CR_7_8 )
{
SignalToNoiseRel = SignalToNoise - QE_SN[int(Constellation) * 5 + int(CodeRate)];
if (fec > FEC_2_5 )
return 0;
switch (mod) {
case QPSK:
snc = DVBT_SN_QPSK[fec];
break;
case QAM_16:
snc = DVBT_SN_QAM16[fec];
break;
case QAM_64:
snc = DVBT_SN_QAM64[fec];
break;
default:
break;
}
SignalToNoiseRel = snr / 100 - snc;
if( SignalToNoiseRel < -70 ) Quality = 0;
else if( SignalToNoiseRel < 30 )
{
if (SignalToNoiseRel < -70 )
Quality = 0;
else if (SignalToNoiseRel < 30)
Quality = ((SignalToNoiseRel + 70) * BERQuality)/100;
}
else
Quality = BERQuality;
KdPrintEx((MSG_TRACE " - " __FUNCTION__ " SNR = %d(%d) Qual %d\n",SignalToNoise,SignalToNoiseRel,Quality));
return Quality;
return (Quality * 3) / 20;
}
int32_t CDigitalDemodulator::DVBT2Quality(int32_t SignalToNoise,DVBT2_Modulation Modulation,DVBT2_CodeRate CodeRate,DVBT2_FECType FECType,
DVBT2_PilotPattern PilotPattern, uint32_t BERNominator, uint32_t BERDenominator )
#if 0
int32_t dvbt2q(int32_t snr, uint32_t mod, uint32_t fec, uint32_t trans, uint32_t pilot,
uint32_t ber_num, uint32_t ber_den)
{
int32_t Quality = 0;
int32_t BERQuality = BERQualityBCH(BERNominator, BERDenominator);
int32_t SignalToNoiseRel = -1000;
static const int32_t QE_SN[] =
{
static const int32_t QE_SN[] = {
// 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 1/3, 2/5
32, 49, 59, 68, 74, 80, 15, 24, // 16K QPSK
82, 104, 116, 130, 136, 141, 62, 74, // 16K 16-QAM
@ -869,8 +875,7 @@ int32_t CDigitalDemodulator::DVBT2Quality(int32_t SignalToNoise,DVBT2_Modulation
else
Quality = 100;
KdPrintEx((MSG_TRACE " - " __FUNCTION__ " SNR = %d(%d) Qual %d\n",SignalToNoise,SignalToNoiseRel,Quality));
return Quality;
return (Quality * 3) / 20;
}
#endif
@ -893,7 +898,6 @@ static void calc_lq(struct dvbfe *fe)
// qual: 0-15 15=BER<2*10^-4 PER<10^-7
get_stat(fe->fd, DTV_STAT_CNR, &st);
snr = st.stat[0].uvalue;
dbgprintf(DEBUG_DVB, "fe%d: snr=%lld\n", fe->nr, snr);
get_property(fe->fd, DTV_INNER_FEC, &fec);
fe->param[PARAM_FEC] = fec + 1;
get_property(fe->fd, DTV_MODULATION, &mod);
@ -904,6 +908,8 @@ static void calc_lq(struct dvbfe *fe)
get_stat(fe->fd, DTV_STAT_PRE_TOTAL_BIT_COUNT, &st);
ber_den = st.stat[0].uvalue;
dbgprintf(DEBUG_DVB, "fe%d: snr=%lld ber=%llu/%llu\n",
fe->nr, snr, ber_num, ber_den);
dbgprintf(DEBUG_DVB, "fe%d: fec=%u mod=%u\n", fe->nr, fec, mod);
switch (fe->n_param[PARAM_MSYS] - 1) {
case SYS_DVBS:
@ -916,8 +922,10 @@ static void calc_lq(struct dvbfe *fe)
fe->quality = dvbcq(snr, mod, ber_num, ber_den);
break;
case SYS_DVBT:
fe->quality = dvbtq(snr, mod, fec, ber_num, ber_den);
break;
case SYS_DVBT2:
//fe->quality = dvbtq(snr, mod, fec, ber_num, ber_den);
break;
case SYS_DVBC2:
break;