hamnet70/impl/src/config.h

#ifndef CONFIG_H
#define CONFIG_H

#include <liquid/liquid.h>

/*** SDR CONFIG ***/

#define SDR_IS_FULL_DUPLEX       0

#define SDR_RX_SAMPLING_RATE     1e6f
#define SDR_TX_SAMPLING_RATE     RX_SAMPLING_RATE

// actually transmitted or received signal frequencies, NOT the SDR center frequency.
#define SDR_TX_FREQ       434.100e6f
#define SDR_RX_FREQ       434.100e6f

// shift applied in the baseband, to get rid of SDR DC peak. If the value here
// is not 0, software mixing will be done on the received signal.
#define SDR_TX_IF_SHIFT     0.000e6f
#define SDR_RX_IF_SHIFT     0.150e6f

// NOTE: the SDR center frequency will be SDR_RX_FREQ - SDR_RX_IF_SHIFT.

/*** LAYER 1 CONFIG ***/

#define SYMBOL_RATE   100e3f

#define PAYLOAD_CHANNEL_CODE   LIQUID_FEC_CONV_V27P34
#define PAYLOAD_MODULATION     LIQUID_MODEM_QAM16

#define HEADER_CHANNEL_CODE   LIQUID_FEC_NONE
#define HEADER_MODULATION     LIQUID_MODEM_QPSK

#define PAYLOAD_CRC_SCHEME    LIQUID_CRC_16

#define PREAMBLE_MSEQ_M       6
#define PREAMBLE_MSEQ_POLY    LIQUID_MSEQUENCE_GENPOLY_M6
#define PREAMBLE_MSEQ_INIT    0x00000001

#define RRC_SPS         4   // samples per symbol
#define RRC_DELAY       7   // delay in symbols
#define RRC_BETA        0.2f

#define TRANSMISSION_RAMP_UP_LEN     64  // symbols
#define TRANSMISSION_RAMP_DOWN_LEN   32  // symbols

#endif // CONFIG_H