TheArchive/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2025-08-13 14:55:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

Improve_RF_sensitivity_NOAA_signal (#2654)

Browse Source
This commit is contained in:
Brumi-2021
2025-05-18 12:49:24 +02:00
committed by GitHub
parent db187301ab
commit 322b06d670
5 changed files with 90 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

116
firmware/common/dsp_fir_taps.hpp
View File

@@ -1327,44 +1327,88 @@ constexpr fir_taps_real<16> taps_40k_wfm_decim_1 = {
// WFMAM decimation filters ////////////////////////////////////////////////
// Used for NOAA 137 Mhz APT sat demod.
// IFIR prototype filter: fs=768000, pass=42000, stop=95000, decim=8, fout=96000
constexpr fir_taps_real<32> taps_84k_wfmam_decim_1 = {
.low_frequency_normalized = -42000.0f / 768000.0f,
.high_frequency_normalized = 42000.0f / 768000.0f,
// IFIR prototype filter: fs=768000, pass=40000, stop=95000, decim=8, fout=96000
constexpr fir_taps_real<32> taps_80k_wfmam_decim_1 = {
.low_frequency_normalized = -40000.0f / 768000.0f,
.high_frequency_normalized = 40000.0f / 768000.0f,
.transition_normalized = 53000.0f / 768000.0f,
.taps = {{
13,
-6,
-47,
-116,
-207,
-294,
-332,
-266,
-39,
386,
1012,
1795,
2648,
3452,
4079,
4423,
4423,
4079,
3452,
2648,
1795,
1012,
386,
-39,
-266,
-332,
-294,
-207,
-116,
-47,
-6,
13,
5,
-37,
-120,
-248,
-397,
-519,
-535,
-354,
106,
896,
2006,
3355,
4797,
6136,
7171,
7736,
7736,
7171,
6136,
4797,
3355,
2006,
896,
106,
-354,
-535,
-519,
-397,
-248,
-120,
-37,
5,
}},
};
// WFMAM decimation filters ////////////////////////////////////////////////
// Used for NOAA 137 Mhz APT sat demod.
// IFIR prototype filter: fs=768000, pass=19000, stop=68000, decim=8, fout=96000
constexpr fir_taps_real<32> taps_38k_wfmam_decim_1 = {
.low_frequency_normalized = -19000.0f / 768000.0f,
.high_frequency_normalized = 19000.0f / 768000.0f,
.transition_normalized = 49000.0f / 768000.0f,
.taps = {{
49,
91,
175,
303,
483,
724,
1028,
1391,
1805,
2253,
2712,
3158,
3560,
3891,
4127,
4250,
4250,
4127,
3891,
3560,
3158,
2712,
2253,
1805,
1391,
1028,
724,
483,
303,
175,
91,
49,
}},
};