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vicliu
108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: codec2_ofdm.h
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AUTHORS.....: David Rowe & Steve Sampson
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DATE CREATED: June 2017
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External user references to the modem library.
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2017 David Rowe
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CODEC2_OFDM_H
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#define CODEC2_OFDM_H
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/* Includes */
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#include <stdbool.h>
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#include <stdint.h>
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#include "comp.h"
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#include "modem_stats.h"
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/* Defines */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define OFDM_PEAK 16384 /* peak level of OFDM TX signal */
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#define OFDM_CLIP (32767*0.35) /* experimentally derived constant to reduce PAPR to about 8dB */
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#define UN_SYNC 0 /* Used with the ofdm_set_sync() */
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#define AUTO_SYNC 1
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#define MANUAL_SYNC 2
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#define AUTO_PHASE_EST 0
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#define LOCKED_PHASE_EST 1
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#define LOW_BW 0
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#define HIGH_BW 1
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struct OFDM_CONFIG;
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struct OFDM;
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/* create and destroy modem states */
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struct OFDM *ofdm_create(const struct OFDM_CONFIG * config);
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void ofdm_destroy(struct OFDM *);
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void ofdm_init_mode(char mode[], struct OFDM_CONFIG *config);
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/* signal processing */
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void ofdm_mod(struct OFDM *, COMP *, const int *);
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void ofdm_demod(struct OFDM *, int *, COMP *);
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void ofdm_demod_shorts(struct OFDM *, int *, short *, float);
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int ofdm_sync_search(struct OFDM *, COMP *);
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int ofdm_sync_search_shorts(struct OFDM *, short *, float);
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void ofdm_sync_state_machine(struct OFDM *, uint8_t *);
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void ofdm_sync_state_machine2(struct OFDM *, uint8_t *);
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/* getters */
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struct OFDM_CONFIG *ofdm_get_config_param(struct OFDM *ofdm);
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int ofdm_get_nin(struct OFDM *);
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int ofdm_get_samples_per_frame(struct OFDM *ofdm);
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int ofdm_get_samples_per_packet(struct OFDM *ofdm);
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int ofdm_get_max_samples_per_frame(struct OFDM *ofdm);
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int ofdm_get_bits_per_frame(struct OFDM *ofdm);
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int ofdm_get_bits_per_packet(struct OFDM *ofdm);
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int ofdm_get_phase_est_bandwidth_mode(struct OFDM *ofdm);
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/* option setters */
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void ofdm_set_verbose(struct OFDM *, int);
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void ofdm_set_timing_enable(struct OFDM *, bool);
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void ofdm_set_foff_est_enable(struct OFDM *, bool);
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void ofdm_set_phase_est_enable(struct OFDM *, bool);
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void ofdm_set_phase_est_bandwidth_mode(struct OFDM *ofdm, int val);
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void ofdm_set_off_est_hz(struct OFDM *, float);
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void ofdm_set_sync(struct OFDM *, int);
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void ofdm_set_tx_bpf(struct OFDM *, bool);
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void ofdm_set_dpsk(struct OFDM *ofdm, bool val);
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void ofdm_set_packets_per_burst(struct OFDM *ofdm, int packetsperburst);
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void ofdm_print_info(struct OFDM *);
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#ifdef __cplusplus
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}
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#endif
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#endif
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