t/gr-ieee802-11
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define constellation in utils.cc

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This commit is contained in:
Bastian Bloessl
2013-10-15 19:06:04 +02:00
parent be4a896626
commit 0bd43f83fe
4 changed files with 126 additions and 113 deletions
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lib/ofdm_mapper.cc
+5 -59
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@@ -63,7 +63,7 @@ void map_to_symbols(const char *bits, size_t len) {
for(int i = 0; i < len; i++) {
// the signal field is bpsk encoded
d_symbols[i] = (i < 48) ? bpsk_mapping[bits[i]] : mapping[bits[i]];
d_symbols[i] = (i < 48) ? BPSK[bits[i]] : mapping[bits[i]];
dout << d_symbols[i] << " ";
}
dout << std::endl;
@@ -194,22 +194,22 @@ void set_encoding(Encoding encoding) {
switch (encoding) {
case BPSK_1_2:
case BPSK_3_4:
mapping = bpsk_mapping;
mapping = BPSK;
break;
case QPSK_1_2:
case QPSK_3_4:
mapping = qpsk_mapping;
mapping = QPSK;
break;
case QAM16_1_2:
case QAM16_3_4:
mapping = qam16_mapping;
mapping = QAM16;
break;
case QAM64_2_3:
case QAM64_3_4:
mapping = qam64_mapping;
mapping = QAM64;
break;
default:
@@ -227,62 +227,8 @@ private:
gr::thread::mutex d_mutex;
const gr_complex *mapping;
static const gr_complex bpsk_mapping[2];
static const gr_complex qpsk_mapping[4];
static const gr_complex qam16_mapping[16];
static const gr_complex qam64_mapping[64];
};
// constellations for different modulations (normalized to avg power 1)
const gr_complex ofdm_mapper_impl::bpsk_mapping[2] = {
gr_complex(-1.0, 0.0), gr_complex(1.0, 0.0)};
const gr_complex ofdm_mapper_impl::qpsk_mapping[4] = {
gr_complex(-0.7071, -0.7071), gr_complex(-0.7071, 0.7071),
gr_complex(+0.7071, -0.7071), gr_complex(+0.7071, 0.7071)};
const gr_complex ofdm_mapper_impl::qam16_mapping[16] = {
gr_complex(-0.9487, -0.9487), gr_complex(-0.9487, -0.3162),
gr_complex(-0.9487, 0.9487), gr_complex(-0.9487, 0.3162),
gr_complex(-0.3162, -0.9487), gr_complex(-0.3162, -0.3162),
gr_complex(-0.3162, 0.9487), gr_complex(-0.3162, 0.3162),
gr_complex(0.9487, -0.9487), gr_complex(0.9487, -0.3162),
gr_complex(0.9487, 0.9487), gr_complex(0.9487, 0.3162),
gr_complex(0.3162, -0.9487), gr_complex(0.3162, -0.3162),
gr_complex(0.3162, 0.9487), gr_complex(0.3162, 0.3162)};
const gr_complex ofdm_mapper_impl::qam64_mapping[64] = {
gr_complex(-1.0801, -1.0801), gr_complex(-1.0801, -0.7715),
gr_complex(-1.0801, -0.1543), gr_complex(-1.0801, -0.4629),
gr_complex(-1.0801, 1.0801), gr_complex(-1.0801, 0.7715),
gr_complex(-1.0801, 0.1543), gr_complex(-1.0801, 0.4629),
gr_complex(-0.7715, -1.0801), gr_complex(-0.7715, -0.7715),
gr_complex(-0.7715, -0.1543), gr_complex(-0.7715, -0.4629),
gr_complex(-0.7715, 1.0801), gr_complex(-0.7715, 0.7715),
gr_complex(-0.7715, 0.1543), gr_complex(-0.7715, 0.4629),
gr_complex(-0.1543, -1.0801), gr_complex(-0.1543, -0.7715),
gr_complex(-0.1543, -0.1543), gr_complex(-0.1543, -0.4629),
gr_complex(-0.1543, 1.0801), gr_complex(-0.1543, 0.7715),
gr_complex(-0.1543, 0.1543), gr_complex(-0.1543, 0.4629),
gr_complex(-0.4629, -1.0801), gr_complex(-0.4629, -0.7715),
gr_complex(-0.4629, -0.1543), gr_complex(-0.4629, -0.4629),
gr_complex(-0.4629, 1.0801), gr_complex(-0.4629, 0.7715),
gr_complex(-0.4629, 0.1543), gr_complex(-0.4629, 0.4629),
gr_complex(1.0801, -1.0801), gr_complex(1.0801, -0.7715),
gr_complex(1.0801, -0.1543), gr_complex(1.0801, -0.4629),
gr_complex(1.0801, 1.0801), gr_complex(1.0801, 0.7715),
gr_complex(1.0801, 0.1543), gr_complex(1.0801, 0.4629),
gr_complex(0.7715, -1.0801), gr_complex(0.7715, -0.7715),
gr_complex(0.7715, -0.1543), gr_complex(0.7715, -0.4629),
gr_complex(0.7715, 1.0801), gr_complex(0.7715, 0.7715),
gr_complex(0.7715, 0.1543), gr_complex(0.7715, 0.4629),
gr_complex(0.1543, -1.0801), gr_complex(0.1543, -0.7715),
gr_complex(0.1543, -0.1543), gr_complex(0.1543, -0.4629),
gr_complex(0.1543, 1.0801), gr_complex(0.1543, 0.7715),
gr_complex(0.1543, 0.1543), gr_complex(0.1543, 0.4629),
gr_complex(0.4629, -1.0801), gr_complex(0.4629, -0.7715),
gr_complex(0.4629, -0.1543), gr_complex(0.4629, -0.4629),
gr_complex(0.4629, 1.0801), gr_complex(0.4629, 0.7715),
gr_complex(0.4629, 0.1543), gr_complex(0.4629, 0.4629)};
ofdm_mapper::sptr
ofdm_mapper::make(Encoding mcs, bool debug) {
return gnuradio::get_initial_sptr(new ofdm_mapper_impl(mcs, debug));