Abstract
Cooperative jamming (CJ) can effectively improve the security of wireless communication system in the physical layer, but such improvement is conditional on effective CJ cancellation at the authorized receiver. In this letter, by considering the point-to-point communication system, a CJ cancellation architecture is provided, and a testbed is designed and implemented to verify its feasibility. In a lab environment under line-of-sight (LOS) propagation, experimental results demonstrate that the proposed CJ cancellation architecture can provide about 51 dB CJ cancellation capability, while the noise floor is raised by 5 dB because of the imperfect time-frequency synchronization and the imperfect channel estimation. Besides, the system achieves 7.3 bps/Hz on secrecy capacity, as compared to perfect CJ cancellation, it causes about 0.8 bps/Hz degradation.
Published Version
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