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TX filter coefficients for 48 kHz

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This commit is contained in:
Andy CA6JAU
2017-10-14 12:18:43 -03:00
parent e469294348
commit 551eac3140
7 changed files with 46 additions and 22 deletions
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DStarTX.cpp
+5 -3
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@@ -27,8 +27,10 @@ const uint8_t BIT_SYNC = 0xAAU;
const uint8_t FRAME_SYNC[] = {0xEAU, 0xA6U, 0x00U};
// Generated using gaussfir(0.35, 1, 5) in MATLAB
static q15_t GAUSSIAN_0_35_FILTER[] = {0, 0, 0, 0, 1001, 3514, 9333, 18751, 28499, 32767, 28499, 18751, 9333, 3514, 1001}; // numTaps = 15, L = 5
// Generated using gaussfir(0.35, 1, 10) in MATLAB
static q15_t GAUSSIAN_0_35_FILTER[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 1001, 1942, 3514, 5930,
9333, 13699, 18751, 23938, 28499, 31644, 32767, 31644,
28499, 23938, 18751, 13699, 9333, 5930, 3514, 1942, 1001}; // numTaps = 30, L = 10
const uint16_t GAUSSIAN_0_35_FILTER_PHASE_LEN = 3U; // phaseLength = numTaps/L
const q15_t DSTAR_LEVEL0 = -841;
@@ -196,7 +198,7 @@ m_poLen(0U),
m_poPtr(0U),
m_txDelay(60U) // 100ms
{
::memset(m_modState, 0x00U, 20U * sizeof(q15_t));
::memset(m_modState, 0x00U, 15U * sizeof(q15_t));
m_modFilter.L = DSTAR_RADIO_SYMBOL_LENGTH;
m_modFilter.phaseLength = GAUSSIAN_0_35_FILTER_PHASE_LEN;