Crazy Danish Hacker – GSM Sniffing 4 – GQRX Installation and usage
Episode 4: installing and using GQRX, an open-source SDR receiver front-end. First hands-on look at the GSM band with an RTL-SDR dongle.
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Crazy Danish Hacker – GSM Sniffing 3 – Identifying downlinks
Episode 3: identifying GSM downlink frequencies. Using a spectrum viewer to scan the GSM 900 and 1800 bands and pick out active downlink channels used by nearby cell towers.
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Crazy Danish Hacker – GSM Sniffing 2 – Requirements
Episode 2: hardware requirements for GSM sniffing. RTL-SDR dongle with E4000 tuner, appropriate antennas, and a Linux workstation. Overview of the toolchain needed for later episodes.
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Crazy Danish Hacker – GSM Sniffing 1
Episode 1 of Crazy Danish Hacker’s GSM Sniffing series: introduction to the topic, what the series will cover, and the legal boundaries of intercepting GSM traffic in a controlled lab.
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Building a homemade FM repeater with a Raspberry PI, RPITX and RTL SDR dongle
A radio repeater is usually a radio tower that receives weak signals from handheld, desktop or other radio, and rebroadcasts the same signal at a higher power over a wide area at a different frequency. This allows communications to be extended over a much greater area.
