Merkebu Girmay
ccf5021072
Integrate Channel Impulse Response Database (CIRDB) to enable playback of precomputed realistic channel taps in vrtsim, with runtime selection via YAML metadata. Features: - Read precomputed channel taps from binary database with YAML sidecar - Runtime enable via --vrtsim.cirdb with optional paths (cirdb_yaml, cirdb_file, cirdb_path) - Channel parameter configuration: model_id (TDL-A..E), delay spread (ds_ns), UE speed (speed_mps) - Fallback to existing channel model options when disabled - Time-driven snapshot progression based on elapsed simulation time Fixes: - RNG initialization: Add randominit() call before gaussZiggurat() - FlatBuffers linking: Handle both 'FlatBuffers' and 'flatbuffers' package names when working with external channel emmulator - Address review comments: use pthread directly, update calloc_or_fail, simplify CMake
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#pragma once
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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int want_model_id; // 0..4 for TDL-A..E, or -1 for any
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int want_tx; // exact match
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int want_rx; // exact match
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float want_ds_ns; // nearest
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float want_speed_mps; // nearest
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int allow_shape_swap; // allow TX/RX swap when matching
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float w_ds; // DS distance weight
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float w_speed; // speed distance weight
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const char *yaml_path; // sidecar path
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} cirdb_select_req_t;
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typedef struct {
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int model_id;
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int n_tx;
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int n_rx;
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int L; // taps per link in file
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int S; // snapshots
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double fs_hz;
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double snapshot_dt_s;
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float ds_ns;
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float speed_mps;
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int pair_order;
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uint64_t offset_bytes;
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uint64_t nbytes;
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} cirdb_entry_meta_t;
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int cirdb_yaml_select(const cirdb_select_req_t *req, cirdb_entry_meta_t *out);
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int cirdb_yaml_scan(const char *yaml_path);
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#ifdef __cplusplus
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}
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#endif
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