{"id":15654440,"url":"https://github.com/drom/ofdm","last_synced_at":"2025-04-30T23:48:27.927Z","repository":{"id":145177329,"uuid":"100140604","full_name":"drom/OFDM","owner":"drom","description":"Orthogonal Frequency Division Multiplexing pipeline","archived":false,"fork":false,"pushed_at":"2018-10-19T00:44:42.000Z","size":700,"stargazers_count":28,"open_issues_count":7,"forks_count":17,"subscribers_count":3,"default_branch":"master","last_synced_at":"2025-04-30T23:48:22.419Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Python","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/drom.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2017-08-12T22:22:22.000Z","updated_at":"2024-12-02T12:32:15.000Z","dependencies_parsed_at":"2023-04-18T17:30:37.007Z","dependency_job_id":null,"html_url":"https://github.com/drom/OFDM","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/drom%2FOFDM","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/drom%2FOFDM/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/drom%2FOFDM/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/drom%2FOFDM/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/drom","download_url":"https://codeload.github.com/drom/OFDM/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":251801086,"owners_count":21645968,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-03T12:51:48.804Z","updated_at":"2025-04-30T23:48:27.891Z","avatar_url":"https://github.com/drom.png","language":"Python","funding_links":[],"categories":[],"sub_categories":[],"readme":"# OFDM pipeline\n\n# Protocol\n\nKeep it simple, stupid OFDM pipeline.\n\n## Signal structure\n * encode data bits\n * add preamble symbols\n * add 32 pilots\n * zeros in DC area [-7..7]\n * zeros left/right ends of spectrum [-128..-97, 97...127]\n * 128 data subcarriers per symbol\n * BPSK modulation\n * IFFT 256\n * 1/4 Guard Inteval\n\n[kiss-ofdm.grc](kiss-ofdm.grc)\n\n## Transmitter\n\n[kiss-ofdm-tx-stream.grc](https://github.com/drom/OFDM/blob/master/kiss-ofdm-tx-stream.grc)\n\n### Tx bit-stream\n\nGenerating randomized bit-stream, modulating with BPSK, tagging each 128 bit.\n\n![tx_bits](kiss-ofdm-tx-bits-bd.png)\n\n![tx_bits](kiss-ofdm-tx-bits-plot.png)\n\n### Tx OFDM modulator\n\nAllocating each of 128-bit to one of 256 subcarriers, FFT, CP\n\n![tx_bits](kiss-ofdm-tx-samples-bd.png)\n\n![tx_bits](kiss-ofdm-tx-samples-plot.png)\n\n## Channel\n\nVery simple AWGN channel.\n\n![AWGN channel BD](kiss-ofdm-chan-awgn-bd.png)\n\n![AWGN channel plot](kiss-ofdm-chan-awgn-plot.png)\n\n## Receiver\n\n### Rx OFDM demodulator\n\n[kiss-ofdm-rx-stream.grc](https://github.com/drom/OFDM/blob/master/kiss-ofdm-rx-stream.grc)\n\n![rx_samples](kiss-ofdm-rx-samples-bd.png)\n\n![rx_samples](kiss-ofdm-rx-samples-plot-time.png)\n\n![rx_samples](kiss-ofdm-rx-samples-plot-quad.png)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdrom%2Fofdm","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdrom%2Fofdm","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdrom%2Fofdm/lists"}