diff options
| author | Thomas Tsou <tom@tsou.cc> | 2013-10-11 13:49:55 -0400 |
|---|---|---|
| committer | Thomas Tsou <tom@tsou.cc> | 2013-10-18 13:10:17 -0400 |
| commit | c1f7c42a33a1125f8b39f53a1b6e1bae38376857 (patch) | |
| tree | fd79543a262281b4cbf04bfb09f305b95a715dd4 /Transceiver52M/Transceiver.h | |
| parent | 2c282f5e1268146761413a145fd8ae2fb523fa4f (diff) | |
Transceiver52M: Setup dual sample rate transceiver
This patch applies oversampling, when selected with 4 sps,
to the downlink only, while running the receiver with
minimal sampling at 1 sps. These split sample rates allow
us to run a highly accurate downlink signal with minimal
distortion, while keeping receive path channel filtering
on the FPGA.
Without this patch, we oversample the receive path and
require a steep receive filter to get similar adjacent
channel suppression as the FPGA halfband / CIC filter
combination, which comes with a high computational cost.
Signed-off-by: Thomas Tsou <tom@tsou.cc>
Diffstat (limited to 'Transceiver52M/Transceiver.h')
| -rw-r--r-- | Transceiver52M/Transceiver.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Transceiver52M/Transceiver.h b/Transceiver52M/Transceiver.h index 3e4f784..d243214 100644 --- a/Transceiver52M/Transceiver.h +++ b/Transceiver52M/Transceiver.h @@ -125,7 +125,8 @@ private: /** send messages over the clock socket */ void writeClockInterface(void); - int mSPS; ///< number of samples per GSM symbol + int mSPSTx; ///< number of samples per Tx symbol + int mSPSRx; ///< number of samples per Rx symbol bool mOn; ///< flag to indicate that transceiver is powered on ChannelCombination mChanType[8]; ///< channel types for all timeslots |