64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
#ifndef CONFIG_H
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#define CONFIG_H
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#include <liquid/liquid.h>
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/*** TIMING CONFIG ***/
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#define TX_SWITCH_BACKOFF_PREAMBLE_MS 500 // only relevant if packet cannot be decoded
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#define TX_SWITCH_BACKOFF_END_OF_PACKET_MS 1
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#define TX_SWITCH_BACKOFF_AFTER_RX_ON 500 // time the transceiver must stay in RX mode
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/*** LAYER 1 CONFIG ***/
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#define SYMBOL_RATE 100e3f
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#define PAYLOAD_CHANNEL_CODE LIQUID_FEC_CONV_V27P34
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#define PAYLOAD_MODULATION LIQUID_MODEM_QAM16
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#define HEADER_CHANNEL_CODE LIQUID_FEC_NONE
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#define HEADER_MODULATION LIQUID_MODEM_QPSK
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#define PAYLOAD_CRC_SCHEME LIQUID_CRC_16
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#define PREAMBLE_MSEQ_M 6
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#define PREAMBLE_MSEQ_POLY LIQUID_MSEQUENCE_GENPOLY_M6
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#define PREAMBLE_MSEQ_INIT 0x00000001
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#define RRC_SPS 4 // samples per symbol
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#define RRC_DELAY 7 // delay in symbols
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#define RRC_BETA 0.2f
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#define TRANSMISSION_RAMP_UP_LEN 64 // symbols
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#define TRANSMISSION_RAMP_DOWN_LEN 32 // symbols
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/*** SDR CONFIG ***/
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#define SDR_IS_FULL_DUPLEX 0
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#define SDR_OVERSAMPLING 3 // integer factor!
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#define SDR_RX_SAMPLING_RATE (SYMBOL_RATE * RRC_SPS * SDR_OVERSAMPLING)
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#define SDR_TX_SAMPLING_RATE SDR_RX_SAMPLING_RATE
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// actually transmitted or received signal frequencies, NOT the SDR center frequency.
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#define SDR_TX_FREQ 434.100e6f
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#define SDR_RX_FREQ 434.100e6f
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// shift applied in the baseband, to get rid of SDR DC peak. If the value here
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// is not 0, software mixing will be done on the received signal.
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#define SDR_TX_IF_SHIFT 0.000e6f
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#define SDR_RX_IF_SHIFT 0.150e6f
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// NOTE: the SDR center frequency will be SDR_RX_FREQ - SDR_RX_IF_SHIFT.
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// gain configuration
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#define SDR_GAIN_TX_AMP 0.0f // extra power amplifier. Set to 14.0f to activate.
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#define SDR_GAIN_TX_LNA 0.0f // normal variable gain amplifier.
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#define SDR_GAIN_RX_AMP 0.0f // extra input amplifier. Set to 14.0f to activate.
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#define SDR_GAIN_RX_LNA 30.0f // RF variable gain amplifier.
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#define SDR_GAIN_RX_VGA 24.0f // Baseband variable gain amplifier.
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#endif // CONFIG_H
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