This paper discusses and reports the measured throughput of a 5-GHz WLAN receiver in the presence of ultra-wideband (UWB) interference signals. Two different experimental scenarios are considered: 1) Conducted interference where the UWB signal was injected directly into the victim receiver, and 2) Radiated interference where the UWB signal was radiated from an antenna in close proximity to the victim receiver. In each scenario, the performance of the victim receiver was evaluated by measuring the average throughput (average over sending a file 10 times). The measured throughput as a function of the signal-to-interference ratio SIR indicates that, a throughput of 7.8 Mbps can be achieved with SIR of 3.5 dB at the input of the receiver. However, this achieved throughput represents 50% performance degradation. The results also indicate that, having two UWB interference sources as close as 20 cm to the victim receiver could degrade the receiver performance significantly depending on the received signal level. A separation of at least 0.5 meter between the antennas of the victim and offending devices would satisfy the system requirement for throughput greater than 7Mbps.
Two prototype ultra wideband (UWB) signal sources using the burst CW concept to generate the UWB pulses have been developed and tested. The sources can be used for testing the possibility of interference to communications equipment by UWB signals. The first source has variable pulse width and pulse repetition frequency as well as a variable centre frequency. The second source has a dithering circuit which 'whitens' the spectral output.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.