Practicing a record-and-replay system on USRP

Abstract

Signal recording and replaying is widely used in data analysis, device test, etc. Motivated by this fact, our paper focuses on developing a low-cost record-and-replay prototype based on USRP (Universal Software Radio Peripheral). In particular, we designed and developed a GPS (Global Positioning System) record-and-replay system, which can sample the real GPS signal and then output the analog GPS signal to other devices with cable. In this prototype, we first design the record flow graph and the replay flow graph for USRP, which is verified in the FM band with the FM (Frequency Modulation) broadcasting. After that, we replace the passive antenna with one active antenna suit to amplify the small power GPS signal, lower the quantization bits to reduce the data rate in order to support the wide bandwidth of the GPS signal. Finally, our GPS record-and-replay system is tested and verified by a real GPS receiver. The good performance of our GPS record-and-replay system showed that USRPs can not only used in academia as experiment devices but also used in industry as low-cost wireless auxiliary devices.

Distributed and Mobile Message Level Relaying/Replaying of GNSS Signals

“…This is possible even when the victim is able to track satellites in different frequencies (e.g., simultaneous tracking of GPS L1CA and L2CA) if the attacker replays all relevant bands, by employing wide-band front-ends or coherently sampling multiple bands. The Record-and-Replay approach is extensively demonstrated in literature [9,[15][16][17][18] and is also applicable in the case of authenticated signals [10,19,20].…”

GNU Radio Based Testbed (GRaTe-BED) for Evaluating the Communication Link of Unmanned Aerial Systems

“…Unknown RF standards can be observed in a black box approach, with replaying signals we can spoof pre-recorded control signals and analyze the system responses [23]. For the "replay attack" (Fig.…”