From a88ff12555ec5d1c73e2f65ed61b39d13a8fba8b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Hamal=20Dvo=C5=99=C3=A1k?= <mordae@anilinux.org>
Date: Tue, 2 Jul 2024 01:57:20 +0200
Subject: [PATCH] Remove DC offset filter
Since we are off-tuning, we no longer need it.
---
src/main.c | 10 ----------
1 file changed, 10 deletions(-)
diff --git a/src/main.c b/src/main.c
index 78ad6f6..e56c5aa 100644
--- a/src/main.c
+++ b/src/main.c
@@ -462,8 +462,6 @@ static void rf_rx(void)
const uint32_t base = (uint32_t)rx_cos;
int pos = 0;
- int64_t dcI = 0, dcQ = 0;
-
while (true) {
if (multicore_fifo_rvalid()) {
multicore_fifo_pop_blocking();
@@ -546,10 +544,6 @@ static void rf_rx(void)
int64_t I = I1 - I3 + Q2 - Q4;
int64_t Q = Q1 - Q3 - I2 + I4;
- int64_t I16 = I << 16;
- dcI = ((dcI << 16) - dcI + I16) >> 16;
- I = (I16 - dcI) >> 16;
-
I *= gain;
I /= max_amplitude;
@@ -560,10 +554,6 @@ static void rf_rx(void)
*blockptr++ = I + 128;
- int64_t Q16 = Q << 16;
- dcQ = ((dcQ << 16) - dcQ + Q16) >> 16;
- Q = (Q16 - dcQ) >> 16;
-
Q *= gain;
Q /= max_amplitude;