trx/radio_if.py: clarify magic numbers in sample rate calculation
Change-Id: I55f283113d0324a0236b7bbf13bce5718003b857
diff --git a/python/trx/radio_if.py b/python/trx/radio_if.py
index 2aeb49a..f7f124f 100644
--- a/python/trx/radio_if.py
+++ b/python/trx/radio_if.py
@@ -75,8 +75,8 @@
GSM_TS_PERIOD_uS = GSM_SYM_PERIOD_uS * 156.25
GSM_UL_DL_SHIFT_uS = -(GSM_TS_PERIOD_uS * 3)
- # TODO: explain where do these values come from?
- SAMPLE_RATE = 4.0 * 1625000.0 / 6.0
+ GSM_SYM_RATE = (1.0 / GSM_SYM_PERIOD_uS) * 1e6
+ SAMPLE_RATE = GSM_SYM_RATE * osr
# FIXME: shall be measured (automatically?) for
# particular device and particular clock rate.