Identification of high speed jittered digital interconnects using bicoherence spectra

Interference due to narrowband and broadband sources in mobile computing platforms have the capability to degrade overall wireless performance. Identification of these radio frequency interference (RFI) sources allows for mitigation and improved wireless performance. While shielding gives some immunity, interference sources operating within the same platform as sensitive radio receivers presents challenges far and above traditional electromagnetic compatibility (EMC) of device integration. In this paper, bicoherence, a signal processing analysis algorithm, is used to identify the presence of high-speed interconnects in radiated platform emissions. This paper uses a practical example of RFI found in current wireless platforms and shows that detection is feasible in Gaussian and non-Gaussian additive noise environments.