{"guid":"78d97d77-0eda-54df-8f51-192fdf4e5cd4","title":"Frequency hopping for SDR based GSM mobile station","subtitle":null,"slug":"osmodevcon2019-115-frequency-hopping-for-sdr-based-gsm-mobile-station","link":"https://pretalx.sysmocom.de/osmodevcon2019/talk/TS9ZX3","description":"How to add frequency hopping to GNU Radio based GSM mobile station transceiver?\n\nFrequency hopping is often regarded as significant complicator in implementation of SDR based transmission systems. But is this opinion true in case of modern SDR hardware?\n\nI will show how frequency hopping can be implemented with use of SDR on example of [gr-gsm](https://osmocom.org/projects/gr-gsm/wiki) based GSM mobile station transceiver and [USRPs](https://www.ettus.com/product-categories/usrp-bus-series/) as SDR hardware. My talk will cover solutions to the general challenges posed by frequency hopping and obstacles in particular case of GSM mobile station.","original_language":"eng","persons":["Piotr Krysik"],"tags":["osmodevcon2019","115","osmodevcon2019","Berlin","osmocom"],"view_count":619,"promoted":false,"date":"2019-04-26T00:00:00.000+02:00","release_date":"2019-04-27T02:00:00.000+02:00","updated_at":"2026-03-26T13:30:06.292+01:00","length":2294,"duration":2294,"thumb_url":"https://static.media.ccc.de/media/conferences/osmodevcon/2019/115-hd.jpg","poster_url":"https://static.media.ccc.de/media/conferences/osmodevcon/2019/115-hd_preview.jpg","timeline_url":"https://static.media.ccc.de/media/conferences/osmodevcon/2019/115-hd.timeline.jpg","thumbnails_url":"https://static.media.ccc.de/media/conferences/osmodevcon/2019/115-hd.thumbnails.vtt","frontend_link":"https://media.ccc.de/v/osmodevcon2019-115-frequency-hopping-for-sdr-based-gsm-mobile-station","url":"https://api.media.ccc.de/public/events/78d97d77-0eda-54df-8f51-192fdf4e5cd4","conference_title":"OsmoDevCon 2019","conference_url":"https://api.media.ccc.de/public/conferences/osmodevcon2019","related":[{"event_id":6966,"event_guid":"5e110e1a-e866-53a4-9c85-43ae16122ebc","weight":7},{"event_id":6968,"event_guid":"1e6dba21-c595-5b15-982d-4929a501a58b","weight":9},{"event_id":6969,"event_guid":"6ba990ca-3a7c-5b07-bc48-c166193fcadf","weight":15},{"event_id":6970,"event_guid":"e67ff2f4-5a1b-5f17-a906-357561b9c1fd","weight":10},{"event_id":7021,"event_guid":"8376f4b5-f6de-555f-860a-e3037e169eb9","weight":10},{"event_id":7026,"event_guid":"409ec906-5475-50ff-974e-4c944dbf50e4","weight":14},{"event_id":7029,"event_guid":"a68c2d2f-c237-5c2b-b016-9bde3e00b3a6","weight":12}],"recordings":[{"size":127,"length":2294,"mime_type":"video/mp4","language":"eng","filename":"osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_hd.mp4","state":"new","folder":"h264-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2019-04-27T02:31:02.863+02:00","recording_url":"https://cdn.media.ccc.de/events/osmodevcon/2019/h264-hd/osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_hd.mp4","url":"https://api.media.ccc.de/public/recordings/34866","event_url":"https://api.media.ccc.de/public/events/78d97d77-0eda-54df-8f51-192fdf4e5cd4","conference_url":"https://api.media.ccc.de/public/conferences/osmodevcon2019"},{"size":63,"length":2294,"mime_type":"video/mp4","language":"eng","filename":"osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_sd.mp4","state":"new","folder":"h264-sd","high_quality":false,"width":720,"height":576,"updated_at":"2019-04-27T02:34:36.100+02:00","recording_url":"https://cdn.media.ccc.de/events/osmodevcon/2019/h264-sd/osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_sd.mp4","url":"https://api.media.ccc.de/public/recordings/34868","event_url":"https://api.media.ccc.de/public/events/78d97d77-0eda-54df-8f51-192fdf4e5cd4","conference_url":"https://api.media.ccc.de/public/conferences/osmodevcon2019"},{"size":35,"length":2294,"mime_type":"audio/mpeg","language":"eng","filename":"osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_mp3.mp3","state":"new","folder":"mp3","high_quality":false,"width":0,"height":0,"updated_at":"2019-04-27T02:35:04.594+02:00","recording_url":"https://cdn.media.ccc.de/events/osmodevcon/2019/mp3/osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_mp3.mp3","url":"https://api.media.ccc.de/public/recordings/34869","event_url":"https://api.media.ccc.de/public/events/78d97d77-0eda-54df-8f51-192fdf4e5cd4","conference_url":"https://api.media.ccc.de/public/conferences/osmodevcon2019"},{"size":22,"length":2294,"mime_type":"audio/opus","language":"eng","filename":"osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_opus.opus","state":"new","folder":"opus","high_quality":false,"width":0,"height":0,"updated_at":"2019-04-27T02:35:27.878+02:00","recording_url":"https://cdn.media.ccc.de/events/osmodevcon/2019/opus/osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_opus.opus","url":"https://api.media.ccc.de/public/recordings/34870","event_url":"https://api.media.ccc.de/public/events/78d97d77-0eda-54df-8f51-192fdf4e5cd4","conference_url":"https://api.media.ccc.de/public/conferences/osmodevcon2019"},{"size":234,"length":2294,"mime_type":"video/webm","language":"eng","filename":"osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_webm-hd.webm","state":"new","folder":"webm-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2019-04-27T09:33:39.986+02:00","recording_url":"https://cdn.media.ccc.de/events/osmodevcon/2019/webm-hd/osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_webm-hd.webm","url":"https://api.media.ccc.de/public/recordings/34871","event_url":"https://api.media.ccc.de/public/events/78d97d77-0eda-54df-8f51-192fdf4e5cd4","conference_url":"https://api.media.ccc.de/public/conferences/osmodevcon2019"},{"size":134,"length":2294,"mime_type":"video/webm","language":"eng","filename":"osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_webm-sd.webm","state":"new","folder":"webm-sd","high_quality":false,"width":720,"height":576,"updated_at":"2019-04-27T09:34:06.759+02:00","recording_url":"https://cdn.media.ccc.de/events/osmodevcon/2019/webm-sd/osmodevcon2019-115-eng-Frequency_hopping_for_SDR_based_GSM_mobile_station_webm-sd.webm","url":"https://api.media.ccc.de/public/recordings/34872","event_url":"https://api.media.ccc.de/public/events/78d97d77-0eda-54df-8f51-192fdf4e5cd4","conference_url":"https://api.media.ccc.de/public/conferences/osmodevcon2019"}]}